Texas Instruments DLPC3430 Manual

DLPC3430, DLPC3432, DLPC3433, DLPC3435
and DLPC3438 Software
Programmer's Guide
Literature Number: DLPU020C
July 2014–Revised May 2018

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Table of Contents
Contents
1 Trademarks......................................................................................................................... 7
2 Introduction......................................................................................................................... 7
2.1 Software Programmer’s Guide Overview ............................................................................. 7
3 Interface Specification.......................................................................................................... 8
3.1 I2C Interface and Ports for DLPC343x................................................................................. 8
4 System Initialization ............................................................................................................. 8
4.1 Boot ROM Concept ...................................................................................................... 8
4.2 Resident Boot Software ................................................................................................. 8
4.3 HOST_IRQ Initialization Sequence.................................................................................... 8
5 Software Interface................................................................................................................ 9
5.1 I2C Considerations ....................................................................................................... 9
Revision History.......................................................................................................................... 68

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List of Figures
List of Figures
1 DLPC343x Embedded Configuration...................................................................................... 7
2 HOST_IRQ Timing Diagram................................................................................................ 9
3 Write Parameters........................................................................................................... 11
4 Return Parameters......................................................................................................... 15
5 Byte 1 Write Parameter.................................................................................................... 17
6 Byte 2 Write Parameter.................................................................................................... 17
7 Example of Solid Field Test Pattern (Red).............................................................................. 19
8 Example of Fixed Step Horizontal Ramp Test Pattern................................................................ 20
9 Example of Fixed Step Vertical Ramp Test Pattern................................................................... 20
10 Example of Horizontal Lines Test Pattern .............................................................................. 21
11 Example of Vertical Lines Test Pattern.................................................................................. 21
12 Example of Diagonal Lines Test Pattern................................................................................ 22
13 Example of Grid Lines Test Pattern ..................................................................................... 23
14 Example of Checkerboard Test Pattern................................................................................. 23
15 Example of Color Bars Test Pattern..................................................................................... 24
16 Return Parameters......................................................................................................... 24
17 Cropping Rules when Crop Size exceeds Input Size ................................................................. 28
18 Write Parameters........................................................................................................... 30
19 Rotation and Non-Rotation of Portrait Source.......................................................................... 31
20 Long-Axis Flip............................................................................................................... 31
21 Short-Axis Flip .............................................................................................................. 31
22 Return Parameters......................................................................................................... 32
23 Write Parameters........................................................................................................... 32
24 Return Parameters......................................................................................................... 33
25 Write Parameters........................................................................................................... 34
26 Return Parameters......................................................................................................... 35
27 Write Parameters........................................................................................................... 36
28 Byte 1 Return Parameters ................................................................................................ 37
29 Byte 2 Return Parameters ................................................................................................ 37
30 Bit Weight and Bit Order for Duty Cycle Data.......................................................................... 38
31 Maximum Number of Sequence Vectors................................................................................ 38
32 Return Parameters......................................................................................................... 39
33 Write Parameters........................................................................................................... 42
34 Return Parameters......................................................................................................... 43
35 Write Parameters........................................................................................................... 43
36 Return Parameters......................................................................................................... 44
37 Byte 1 Return Parameters ................................................................................................ 48
38 Return Parameters......................................................................................................... 49
39 Byte 1 Return Parameters ................................................................................................ 49
40 Bit Weight Definition for LABB Gain Value ............................................................................. 49
41 Byte 1 Write Parameters .................................................................................................. 50
42 Bit Weight Definition for the CAIC Maximum Gain Value............................................................. 50
43 Bit Weight Definition for the CAIC Clipping Threshold Value......................................................... 50
44 Bit Weight Definition for the CAIC RGB Intensity Gain Values....................................................... 51
45 Byte 1 Return Parameters ................................................................................................ 52
46 Write Parameters........................................................................................................... 52
47 Return Parameters......................................................................................................... 53

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List of Figures
48 Byte 1 Write Parameters .................................................................................................. 53
49 Bit Weight Definition for the Optical Throw Ratio Data................................................................ 54
50 Visual Definition and Calculation for Optical Throw Ratio Data...................................................... 54
51 Bit Weight Definition for the Optical DMD Offset Data ................................................................ 54
52 Method for Calculation for Optical DMD Offset Data.................................................................. 55
53 Sign Determination for Optical DMD Offset Data ...................................................................... 55
54 Examples of Non-Inverted and Inverted Projector Orientations...................................................... 56
55 Byte 1 Return Parameters ................................................................................................ 57
56 Write Parameters........................................................................................................... 57
57 Pillar-Box Border Example................................................................................................ 58
58 Return Parameters......................................................................................................... 58
59 Bit Weight Definition for the Projection Pitch Angle Data............................................................. 59
60 Examples of Projection Pitch Angle...................................................................................... 60
61 Byte 1 Return Parameters ................................................................................................ 61
62 Byte 1 Return Parameters ................................................................................................ 62
63 Byte 2 Return Parameters ................................................................................................ 62
64 Byte 3 Return Parameters ................................................................................................ 63
65 Byte 4 Return Parameters ................................................................................................ 63
66 Byte 1 Read Parameters.................................................................................................. 64
67 Byte 5 Return Parameters ................................................................................................ 65
68 Byte 6 Return Parameters ................................................................................................ 66
69 Return Parameters......................................................................................................... 66
70 Read Parameters........................................................................................................... 67

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List of Tables
List of Tables
1 I2C Write and Read Transactions.......................................................................................... 9
2 Supported TI Generic Commands ....................................................................................... 10
3 Source Specific Associated Commands ................................................................................ 13
4 Common Commands ...................................................................................................... 14
5 Write Parameters........................................................................................................... 15
6 Return Parameters......................................................................................................... 16
7 Write Parameters........................................................................................................... 16
8 Foreground and Background Color Use ................................................................................ 18
9 Descriptions and Bit Assignments for Parameters 1-4................................................................ 18
10 Number of Bytes Required based on Pattern Selection .............................................................. 19
11 Parameter Bytes............................................................................................................ 24
12 Write Parameters........................................................................................................... 25
13 Return Parameters......................................................................................................... 26
14 Read Parameters........................................................................................................... 26
15 Return Parameters......................................................................................................... 26
16 Splash Screen Header Definitions ....................................................................................... 27
17 Write Parameters........................................................................................................... 27
18 Scaling Limits............................................................................................................... 28
19 Return Parameters......................................................................................................... 28
20 Write Parameters........................................................................................................... 29
21 Return Parameters......................................................................................................... 30
22 Partial List of Commands that May Benefit from the Use of Image Freeze........................................ 34
23 Splash Screen Example Using Image Freeze ......................................................................... 35
24 Test Pattern Generator Example Using Image Freeze................................................................ 35
25 Return Parameters......................................................................................................... 36
26 Return Parameters......................................................................................................... 37
27 Write Parameters........................................................................................................... 39
28 Write Parameters........................................................................................................... 40
29 Input Source Limits for Active Data...................................................................................... 40
30 Return Parameters......................................................................................................... 41
31 Available Commands Based on LED Control Method................................................................. 42
32 Write Parameters........................................................................................................... 44
33 Return Parameters......................................................................................................... 45
34 Return Parameters......................................................................................................... 45
35 Write Parameters........................................................................................................... 46
36 Return Parameters......................................................................................................... 46
37 Return Parameters......................................................................................................... 47
38 Write Parameters........................................................................................................... 48
39 Write Parameters........................................................................................................... 49
40 LABB and CAIC Modes ................................................................................................... 51
41 Return Parameters......................................................................................................... 51
42 Write Parameters........................................................................................................... 53
43 Return Parameters......................................................................................................... 56
44 Write Parameters........................................................................................................... 59
45 Return Parameters......................................................................................................... 60
46 Return Parameters......................................................................................................... 61
47 Return Parameters......................................................................................................... 62

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List of Tables
48 Return Parameters......................................................................................................... 64
49 Read Parameters........................................................................................................... 64
50 Return Parameters......................................................................................................... 65
51 Controller Device ID Decode ............................................................................................. 66
52 DMD Device ID Reference Table ........................................................................................ 67
53 Return Parameters......................................................................................................... 67

...
LED_SEL(2)
DC Supplies
BAT
+
±
1.1 V
WVGA
DDR DMD
DLP2010
(WVGA
DMD)
RESETZ
Included in DLP® Chip Set
CMP_PWM
1.8 V
PROJ_ON
PROJ_ON
2.3 to 5.5 V
CMP_OUT
Projector Module Electronics
INTZ
DLPA200x
PARKZ
1.1 V
1.8 V
VCORE
VIO
Illumination
Optics
3
BIAS, RST, OFS
Thermistor
LABB
I2C
28
Parallel I/F
HOST_IRQ
VCC_INTF
4
EEPROM
DLPC343x
VCC_FLSH
SPI_1
I2C_1
L3
SYSPWR
1.8 V
1.8 V
Other
Supplies 1.1-V
Reg
Sub-LVDS DATA
CTRL
Cal data
(optional)
FLASH,
SDRAM
Keypad
Front-End
Chip
- OSD
- AutoLock
- Scaler
- Microcontroller
HDMI
Receiver
Triple
ADC
Charger
DC_IN
VDD
On/Off
HDMI
VGA
SD Card
Reader, and
so forth
(optional)
FLASH
L1
L2
VLED
BLUE
GREEN
RED
Current
Sense
Spare R/W
GPIO
18
TVP5151
Video
Decoder
CVBS BT.656
Keystone
Sensor
WPC
GPIO_8 (Normal Park)
1.8 V VSPI
4SPI_0
eDRAM
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DLPC3430, DLPC3432, DLPC3435, DLPC3433, and DLPC3438 Software
Programmer’s Guide
Programmer's Guide
DLPU020C–July 2014–Revised May 2018
DLPC3430, DLPC3432, DLPC3435, DLPC3433, and
DLPC3438 Software Programmer’s Guide
1 Trademarks
LightCrafter is a trademark of Texas Instruments.
2 Introduction
2.1 Software Programmer’s Guide Overview
This guide details the software interface requirements for a DLPC343x ASIC-based system. It defines all
applicable communication protocols including I2C initialization, default settings and timing. The DLPC343x
system can be used in Figure 1.
Figure 1. DLPC343x Embedded Configuration
2.1.1 I2C-Based Command Data Interface
The legacy interface configurations make use of an I2C interface for commands and a 24-bit parallel
interface.

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3 Interface Specification
The protocol used in communicating information to DLPC343x consist of a serial data bus conforming to
the Philips I2C specification, up to 100 kHz. MIPI DSI is supported in DLPC343x, but this feature is not
supported in LightCrafter™ Display EVM.
3.1 I2C Interface and Ports for DLPC343x
DLPC343x commands are executed using I2C and support two I2C ports, port-0 and port-1.
Port-0 is primarily used for command and control interface. While using this port, DLPC343x behaves as
an I2C slave.
4 System Initialization
This section describes the methodology used for system initialization.
4.1 Boot ROM Concept
The DLPC343x employs a boot ROM and associated boot software. This resident boot code consists of
the minimum code necessary to complete the program loading. For most DLPC343x product
configurations, an external flash device can store the main application code, along with the other
configuration and operational data required by the system for normal operation.
4.2 Resident Boot Software
The resident boot code consists of the minimum code necessary to load the ARM software from flash to
internal RAM for execution.
4.3 HOST_IRQ Initialization Sequence
HOST_IRQ is a signal indicating the status of DLPC343x initialization. While reset is applied, HOST_IRQ
resets to tri-state (an external pullup pulls the line high). HOST_IRQ remains tri-state (pulled high
externally) until the microprocessor boot completes. While the signal is pulled high, the controller performs
boot-up and auto-initialization.
Immediately after boot-up, the microprocessor drives HOST_IRQ to a logic high state to indicate that the
controller is performing auto-initialization (no real state change occurs on the external signal). Upon
completion of auto-initialization, ARM software sets HOST_IRQ to a logic low state to indicate the
completion of auto-initialization. At the falling edge, the system is said to enter the INIT_DONE state.
After auto-initialization completes, HOST_IRQ generates a logic high interrupt pulse to the host through
software control; this interrupt indicates that the controller detects an error condition or requires service.

RESETZ 500 ms max
I2C access to DLPC343x should not start until HOST_IRQ goes low
(this should occur within 500 ms from the release of RESETZ.
HOST_IRQ
(with External Pullup)
0 ms min
(INIT_BUSY)
(ERR IRQ)
3 µs min
An active-high pulse on HOST_IRQ following the
initialization period will indicate an error condition has been
detected. The source of the error is reported in the system
status.
The first falling edge of HOST_IRQ
indicates auto-initialization done.
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Figure 2. HOST_IRQ Timing Diagram
5 Software Interface
There is generally one set of software commands supported by the DLPC343x controller.
5.1 I2C Considerations
5.1.1 I2C Transactions
Since all I2C commands are processed by software, only one type of I2C transaction is supported. This
transaction type is shown in Table 1 for both writes and reads. The I2C interface supports variably-sized
transactions for example, a one byte transaction, a nine byte transaction) to match the TI commands
discussed later in this document.
(1) The address corresponds to the chip address of the controller.
(2) The subaddress will correspond to a TI command.
(3) The data (if present) will correspond to any required command parameters.
Table 1. I2C Write and Read Transactions
Transaction Address(1) Sub-Address(2) Remaining Data Bytes(3)
Write 8-bits 8-bits 8-bit parameter bytes (0 →N)
36h (or 3Ah) Command value Parameter values
Read Request 8-bits 8-bits 8-bit parameter bytes (0 →N)
36h (or 3Ah) Command value Parameter values
Read Response 8-bits 8-bit parameter bytes (0 →N)
37h (or 3Bh) Parameter values
5.1.1.1 Data Flow Control
While the I2C interface inherently supports flow control by holding the clock, this is not sufficient for all
transactions (for example, sequence and CMT updates). In this case, the host software should use the
Read Short status to determine if the system is busy.
5.1.2 List of System Write/Read Software Commands
The commands supported by the I2C interfaces are discussed in the following sections.

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Table 2. Supported TI Generic Commands
Command Type Command Description Reset Value OpCode (hex) Default Action Section
General Operation
Write Write Input Source Select 1 05 Test pattern Section 5.1.3.1
Read Read Input Source Select 06 Section 5.1.3.2
Write Write External Video Source
Format Select 43h 07 RGB888 Section 5.1.3.3
Write Write Test Pattern Select 7000h 0B White solid field Section 5.1.3.5
Read Read Test Pattern Select 0C Section 5.1.3.6
Write Write Splash Screen Select 0D User-specified Section 5.1.3.7
Read Read Splash Screen Select 0E Section 5.1.3.8
Read Read Splash Screen Header 0F Section 5.1.3.9
Write Write Image Crop ffffffff000000
00h 10 No crop Section 5.1.3.10
Read Read Image Crop 11 Section 5.1.3.11
Write Write Display Size DMD Res 12 Section 5.1.3.12
Read Read Display Size 13 Section 5.1.3.13
Write Write Display Image Orientation 14 User-specified Section 5.1.3.14
Read Read Display Image Orientation 15 Section 5.1.3.15
Write Write Display Image Curtain 1 16 Black Section 5.1.3.16
Read Read Display Image Curtain 17 Section 5.1.3.17
Write Write Image Freeze 0 1A No freeze Section 5.1.3.18
Read Read Image Freeze 1B Section 5.1.3.19
Write Write LOOK Select 22 User-specified Section 5.1.3.20
Read Read LOOK Select 23 Section 5.1.3.21
Read Read Sequence Header
Attributes 26 Section 5.1.3.22
Read Read DMD Sequencer Sync
Mode 2C Section 5.1.3.23
Write Write Execute Batch File 0 2D Section 5.1.3.24
Write Write External Input Image Size DMD Res 2E Section 5.1.3.25
Read Read External Input Image Size 2F Section 5.1.3.26
Write Write Splash Screen Execute 35 Section 5.1.3.27
Illumination Control
Write Write LED Output Control
Method 50 User-specified Section 5.1.3.28
Read Read LED Output Control
Method 51 Section 5.1.3.29
Write Write RGB LED Enable 7h 52 Enabled Section 5.1.3.30
Read Read RGB LED Enable 53 Section 5.1.3.31
Write Write RGB LED Current 54 User-specified Section 5.1.3.32
Read Read RGB LED Current 55 Section 5.1.3.33
Read Read CAIC LED Max Available
Power 57 Section 5.1.3.34
Write Write RGB LED Max Current 5C User-specified Section 5.1.3.35
Read Read RGB LED Max Current 5D Section 5.1.3.36
Read Read CAIC RGB LED Current 5F Section 5.1.3.37
Image Processing Control
Write Write Local Area Brightness
Boost Control 1 80 Manual strength control Section 5.1.3.38
Read Read Local Area Brightness
Boost Control 81 Section 5.1.3.39

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Table 2. Supported TI Generic Commands (continued)
Command Type Command Description Reset Value OpCode (hex) Default Action Section
Write Write CAIC Image Processing
Control 84 User-specified Section 5.1.3.40
Read Read CAIC Image Processing
Control 85 Section 5.1.3.41
Write Write CCA Control 1 86 Enabled Section 5.1.3.42
Read Read CCA Control 87 Section 5.1.3.43
Write Write Keystone Correction
Control 0 88 Disabled Section 5.1.3.44
Read Read Keystone Correction
Control 89 Section 5.1.3.45
General Setup
Write Write Border Color 0 B2 Black Section 5.1.3.46
Read Read Border Color B3 Section 5.1.3.47
Write Write Keystone Projection Pitch
Angle 0 BB 0 Pitch angle Section 5.1.3.48
Read Read Keystone Projection Pitch
Angle BC Section 5.1.3.49
Administrative Commands
Read Read Short Status D0 Section 5.1.3.50
Read Read System Status D1 Section 5.1.3.51
Read Read System Software Version D2 Section 5.1.3.52
Read Read Communication Status D3 Section 5.1.3.53
Read Read Controller Device ID D4 Section 5.1.3.54
Read Read DMD Device ID D5 Section 5.1.3.55
Read Read Flash Build Version D9 Section 5.1.3.56
5.1.3 System Write/Read Commands
5.1.3.1 Write Input Source Select (05h)
5.1.3.1.1 Write
This command selects the image input source for the display module.
5.1.3.1.2 Write Parameters
Figure 3 describes the command parameters.
Figure 3. Write Parameters
MSB Byte 1 LSB
b7 b6 b5 b4 b3 b2 b1 b0
b(7:2) Reserved
b(1:0) Input Source:
• 0h: External Video Port
• 1h: Test Pattern Generator
• 2h: Splash Screen
• 3h: Reserved

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Default: 01h
NOTE: When selecting the external video port, there is a set of associated commands applicable
only to this source selection. These associated commands are the Write External Input
image Size and the Write External Video Source Format Select.
When selecting the test pattern generator, only one associated command is applicable to this
source selection. This associated command is the Write Test Pattern Select command.
When selecting the splash screen, only two associated commands are applicable to this
source selection. These associated commands are the Write Splash Screen Select and Write
splash Screen Execute commands.
These associations are also shown in Table 3.

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(1) The Write Splash Screen Execute command is special in that there is no maintained state or history. Thus this command has no settings
to be stored and reused by the system.
Table 3. Source Specific Associated Commands
Source Specific Associated Commands Input Source Select Options
External Video Port Test Pattern Generator Splash Screen(1)
Write External Video Source Format Select Only N/A N/A
Write External Input Image Size Only N/A N/A
Write Test Pattern Select N/A Only N/A
Write Splash Screen Select N/A N/A Only
Write Splash Screen Execute N/A N/A Special
These commands (other than Write Splash Screen Execute) describe the characteristics of their
associated source, and once these settings are defined the system stores them. Afterwards, each time an
input source selection is made (using the Write Input Source Select command), the system remembers
the settings described by the commands associated with the selected source, and automatically applies
them. The user only needs to send these associated commands when the source is first defined, or when
the source characteristics for that port must be changed. The appropriate associated commands must be
updated when source characteristics change.
The user can send source-associated commands every time they make an input source selection. The
source associated commands should be sent prior to sending the Write Input Source Select command.
When source-associated commands are sent when that source is not active, the controller software saves
the new settings, but does not execute these commands. When that source becomes active (via the Write
Input Source Select command), the controller applies these new settings, as in the following example:
1. The user sends the following commands (active input source = test pattern generator):
•Write image Freeze = freeze
•Write External Video Source Format Select (settings stored, command not executed)
•Write External Input Image Size (settings stored, command not executed)
•Write Input Source Select = external port (see step 2 below)
•Write Image Freeze = unfreeze
2. When the Write Input Source Select command is received, the software applies the settings from these
external video port-associated commands:
•External Video Source Format Select
•External input Image Size
If source-associated commands are sent for a source that is already active, the controller software
executes these commands when received, as in the following example:
• The user sends the following commands (active input source = external video port):
–Write Image Freeze = freeze
–Write external Video Source Format Select (command executed)
–Write Image Freeze = unfreeze
The rest of the commands that apply to image setup have settings applicable across all source selections,
and typically remain the same across the three input source selections. A few examples are Write Display
Size and Write Display Image Orientation. A representative list of these commands is shown in Table 4.

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Table 4. Common Commands
Common Commands Input Source Select Options
External Video Port Test Pattern Generator Splash Screen
Write Image Crop Common Common Common
Write Display Image Size Common Common Common
Write Keystone Correction Control Common Common Common
Write Display Image Orientation Common Common Common
Write Display Image Curtain Common Common Common
Write Look Select Common Common Common
Write Local Area Brightness Boost Control Common Common Common
Write CAIC Image Processing Control Common Common Common
While the values for these commands may be the same across the different input source types, the
hardware settings may change (for example: display image size = 1080p = DMD size – the external port
input source size is WXGA, which is scaled up to the display size of 1080p. If the user changes to the
TPG Input Source, the size of the test pattern must match the size of the DMD. Therefore, the scaler
settings must to be changed). The controller software manages the underlying hardware settings. This
also applies to those commands which specify automatic operation. While the automatic setting remains
the same, the underlying algorithm might change its settings based on the characteristic of the selected
source.
NOTE: The user is required to specify the active data size for all external input sources, using the
Write Input Image Size command.
NOTE: When a test pattern is selected, it is generated at the resolution of the DMD, modified by the
settings specified by the Write Image Crop command, and displayed at the resolution
specified by the Write Display Size command.
NOTE: The user should see the Write Image Freeze command for information on hiding on-screen
artifacts when selecting an input source.
5.1.3.2 Read Input Source Select (06h)
5.1.3.2.1 Read
This command reads the state of the image input source for the display module.
5.1.3.2.2 Read Parameters
This command has no command parameters.
5.1.3.2.3 Return Parameters
Figure 4 describes the return parameters.

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Figure 4. Return Parameters
MSB Byte 1 LSB
b7 b6 b5 b4 b3 b2 b1 b0
b(7:2) Reserved
b(1:0) Input source
• 0h: External video port
• 1h: Test Pattern generator
• 2h: Splash screen
• 3h: Reserved
5.1.3.3 Write External Video Source Format Select (07h)
5.1.3.3.1 Write
This command specifies the active external video port and the source data type for the display module.
5.1.3.3.2 Write Parameters
Table 5 describes the command parameters.
Table 5. Write Parameters
CMD Parameter Port Bits/Pixel Data Type Bus
Width Clks/Pix el Notes
40h Parallel 16 RGB 565 16 1 Auto-select RGB CSC
41h Parallel 18 RGB 666 18 1 Auto-select RGB CSC
42h Parallel 24 RGB 888 8 3 Auto-select RGB CSC
43h Parallel 24 RGB 888 24 1 Auto-select RGB CSC
50h Parallel 18 YCbCr 666 18 1 Auto-select YCbCr CSC
51h Parallel 24 YCbCr 888 24 1 Auto-select YCbCr CSC
60h Parallel 16 YCbCr 4:2:2 88 8 2 Auto-select YCbCr CSC
Auto-select 4:2:2 →4:4:4
61h Parallel 16 YCbCr 4:2:2 88 16 1 Auto-select YCbCr CSC
Auto-select 4:2:2 →4:4:4
Default: 43h
This command is used in conjunction with the Write Input Source Select command. This command
specifies which input port displays when the Write Input Source Select command selects external video
port as the image source. The settings for this command are retained until changed using this command.
These settings are automatically applied each time the external video port is selected.
When the external video port is selected as the input source, the software automatically selects and loads
the proper CSC, based on the selected parameter of this command (appropriate matrix for RGB, selected
matrix for YCbCr including offset).The appropriate data path is also automatically selected for 4:2:2 versus
4:4:4 processing.
The selection of video source port is independent from the selected command port.
The user should review the notes for the Write Input Source Select command to understand the concept
of source-associated commands. This concept determines when source-associated commands are
executed by the system. This command is a source-associated command.

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5.1.3.4 Read External Video Source Format Select (08h)
5.1.3.4.1 Read
This command reads the state of the active external video port and the source data type for the display
module.
5.1.3.4.2 Read Parameters
This command has no read parameters.
5.1.3.4.3 Return Parameters
Table 6 describes the return parameters.
Table 6. Return Parameters
CMD
Parameter Port Bits/Pixel Data Type Bus Width Clks/Pix el Notes
40h Parallel 16 RGB 565 16 1 Auto-select RGB CSC
41h Parallel 18 RGB 666 18 1 Auto-select RGB CSC
42h Parallel 24 RGB 888 8 3 Auto-select RGB CSC
43h Parallel 24 RGB 888 24 1 Auto-select RGB CSC
50h Parallel 18 YCbCr 666 18 1 Auto-select YCbCr CSC
51h Parallel 24 YCbCr 888 24 1 Auto-select YCbCr CSC
60h Parallel 16 YCbCr 4:2:2 88 8 2 Auto-select YCbCr CSC
Auto-select 4:2:2 →4:4:4
61h Parallel 16 YCbCr 4:2:2 88 16 1 Auto-select YCbCr CSC
Auto-select 4:2:2 →4:4:4
5.1.3.5 Write Test Pattern Select (0Bh)
5.1.3.5.1 Write
This command specifies an internal test pattern for display on the display module.
5.1.3.5.2 Write Parameters
Table 7 describes the command parameters.
Table 7. Write Parameters
Parameter Bytes Description
Byte 1 TPG pattern select
Byte 2 Foreground and background color (see Table 8)
Byte 3 Parameter 1 (see Table 9)
Byte 4 Parameter 2 (see Table 9)
Byte 5 Parameter 3 (see Table 9)
Byte 6 Parameter 4 (see Table 9)

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Figure 5. Byte 1 Write Parameter
MSB Byte 1 LSB
b7 b6 b5 b4 b3 b2 b1 b0
b(7) Test pattern border:
• 00h: Disabled
• 01h: Enabled
b(6:4) Reserved
b(3:0) Left pattern select:
• 00h: Solid field
• 01h: Fixed step horizontal ramp
• 02h: Fixed step vertical ramp
• 03h: Horizontal lines
• 04h: Diagonal lines
• 05h: Vertical lines
• 06h: Horizontal and vertical grid
• 07h: Checkerboard
• 08h: Color bars
• 09h-0Fh: Reserved
Byte 1 default: 00h
Figure 6. Byte 2 Write Parameter
MSB Byte 2 LSB
b7 b6 b5 b4 b3 b2 b1 b0
b(7) Reserved
b(6:4) Foreground color:
• 0h: Black
• 1h: Red
• 2h: Green
• 3h: Blue
• 4h: Cyan
• 5h: Magenta
• 6h: Yellow
• 7h: White
b(3:0) Reserved
b(2:0) Background color:
• 0h: Black
• 1h: Red
• 2h: Green
• 3h: Blue
• 4h: Cyan
• 5h: Magenta
• 6h: Yellow
• 7h: White

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Table 8. Foreground and Background Color Use
Pattern Byte 2
Foreground Color Background Color
Solid field Yes No
Fixed step horizontal ramp Yes No
Fixed step vertical ramp Yes No
Horizontal lines Yes Yes
Vertical lines Yes Yes
Diagonal lines Yes Yes
Grid lines Yes Yes
Checkerboard Yes Yes
Color bars No No
Byte 2 default: 70h
Table 9. Descriptions and Bit Assignments for Parameters 1-4
Pattern Byte 6 (Parameter 4) Byte 5 (Parameter 3) Byte 4 (Parameter 2) Byte 3 (Parameter 1)
Description Bits Description Bits Description Bits Description Bits
Solid field N/A N/A N/A N/A
Fixed step
horizontal ramp N/A N/A End value 8 Start value 8
Fixed step
vertical ramp N/A N/A End value 8 Start value 8
Horizontal lines N/A N/A Background line
width 8 Foreground line width 8
Vertical lines N/A N/A Background line
width 8 Foreground line width 8
Diagonal lines N/A N/A Vertical spacing 8 Horizontal spacing 8
Grid lines Vertical background line
width 8Vertical foreground
line width 8Horizontal
background line
width 8Horizontal foreground
line width 8
Checkerboard Number of vertical
checkers 3Number of vertical checkers 8Number of horizontal checkers 3Number of horizontal checkers 8
Color bars N/A N/A N/A N/A
This command is used in conjunction with the Write Input Source Select command. This command
specifies which test pattern displays when the Write Input Source Select command selects test pattern
generator as the image source. The settings for this command are retained until changed using this
command. These settings automatically apply each time the test pattern generator is selected.
Batch files are created and stored in flash, and recall the settings for predefined test patterns.
Test patterns are created at the resolution of the display (DMD), are modified by the Write Image Crop
command, and displayed at the resolution specified by the Write Display Size command.
Test patterns display at the default frame rate 60 Hz.
The Test Pattern Border Selection creates a white border, a single pixel wide and tall, around the specified
test pattern.
The user must review the notes for the Write Input Source Select command to understand the concept of
source-associated commands. This concept determines when source-associated commands are executed
by the system. This command is a source-associated command.
When a foreground or background color is not used, the bit values are ignored (see Table 8). If both
foreground and background color are not used, or when a parameter byte (bytes 3 thru 6) is not used, the
byte should not be sent. Table 10 shows the number of bytes required, based on the specified pattern.

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Table 10. Number of Bytes Required based on Pattern Selection
Specified Pattern Number of Bytes Required
Solid field 2
Fixed step horizontal ramp 4
Fixed step vertical ramp 4
Horizontal lines 4
Vertical lines 4
Diagonal lines 4
Grid lines 6
Checkerboard 7
Color bars 1
As noted in Table 8, the color for the solid field pattern is specified using the foreground color. An example
of a solid field pattern is shown in Figure 7.
Figure 7. Example of Solid Field Test Pattern (Red)
As noted in Table 8, the color for the fixed step horizontal ramp pattern is specified using the foreground
color. As noted in Table 9, the user specifies the start value and the stop value for the ramp. For this
pattern, the system automatically determines the step size based on the start and stop values and the size
of the display (DMD). The minimum start value is 0, the maximum stop value is 255, and the start value
must always be smaller than the stop value. For example, if the start value = 0, the stop value = 255, and
the DMD resolution is 1280 wide, the step size would be 5 (1280 pixels / 256 values = 5). Thus every gray
shade value from 0 to 255 would have a step size of 5 pixels (such that each step would have 5 columns
of pixels with the same gray scale value). The gray scale value always increments by 1 for each step
between the start and stop values. An example of a fixed step horizontal ramp pattern is shown in
Figure 8.

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Figure 8. Example of Fixed Step Horizontal Ramp Test Pattern
As noted in Table 8, the color for the fixed step vertical ramp pattern is specified using the foreground
color. As noted in Table 9, the user specifies the start value and the stop value for the ramp. For this
pattern, the system automatically determines the step size based on the start and stop values and the size
of the display (DMD). The minimum start value = 0, the maximum stop value = 255, and the start value
must always be smaller than the stop value. For example, if the start value = 0, the stop value = 255, and
the DMD resolution is 768 tall, then the step size would be 3 (768 pixels / 256 values = 3). Thus every
value from 0 to 255 would have a step size of 3 pixels (such that each step would have 3 rows of pixels
with the same gray scale value). The gray scale value always increments by 1 for each step between the
start and stop values. An example of a fixed step vertical ramp pattern is shown in Figure 9.
Figure 9. Example of Fixed Step Vertical Ramp Test Pattern