Critical Link MityARM-335x User manual

Critical Link, LLC
www.CriticalLink.com MityARM-335x Development Kit
www.MityDSP.com 12 April 2013
1 Copyright © 2007-2013, Critical Link LLC
FEATURES
MityARM-335x Development Board
MityARM-335x SoM Module
Additional Hardware Included:
RS485/422 Expansion Kit
RS232 Expansion Kit
Serial & Ethernet Cables
AC to DC 12V 1.2A Adapter
Integrated +3V/+5V Power Supplies
Digital Interfaces:
HDMI Video Only Interface with
2048x2048 maximum resolution
Audio Output and Microphone Input
10/100/1000 MBit Ethernet Interface
8-Channel ADC
RS-232 Serial Interface
USB Host Interface
USB OTG Interface
Dual Electrically Isolated CAN Bus
Interfaces
SD/MMC Card Socket
Expansion
2 UART Expansion Headers
41-Pin with SPI, I2C and GPIO
LCD Interface
Software and Documentation:
Real-Time Linux Kernel
uBoot
Development Environment - Virtual
Machine
Development Board Schematics
Development Board Gerber Files
Development Board BOM
APPLICATIONS
MityARM-335x Evaluation
Process Automation
Factory Automation
Industrial Automation
Embedded Instrumentation
Rich Displays
Rapid Prototyping
DESCRIPTION
The MityARM-335x Development Kit provides all the hardware and software support for
system designers and developers to evaluate the Critical Link MityARM-335x System on
Module. The MityARM-335x Development Kit comes complete with the MityARM-
335x module that meets your project’s needs.
The MityARM-335x Development Kit includes on-board RS-232, 10/100/1000 GBit
Ethernet, Universal Serial Bus (USB 2.0) Host and USB-On-The-Go (OTG)
communication interfaces. Dual electrically isolated CAN and dual UART expansion
ports provide a wide range of communication interfaces. Included are RS232 and
RS485/422 expansion kits from Critical Link, Table 18.

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The High-Definition Multimedia Interface (HDMI) supports displays up to a resolution
of 2048 x 2048 through a standard HDMI connector, video only. An interface to support
an XGA LCD display with SPI or ADC interfaces for resistive touch control is available
via an expansion kit, Table 18. Multi Media Card (MMC) interface supporting Secure
Digital (SD) cards and an I/O Expansion connector for an 802.11b/g/n Wireless with
Bluetooth module from Critical Link, Table 18, or a user designed custom add-on card.
All powered from a single 12VDC input with onboard +3V/+5V power supplies.
A block diagram of the MityARM-335x Development Kit is illustrated in Figure 1 on the
following page. All available processor GPIO ports are used directly by the MityARM-
335x Development Kit. Control of the on-board interface hardware and connected
Expansion IO cards require proper configuration of the MityARM-335x Module. While
not required, it is strongly recommended that the MityARM software development kit
and supplied API be used to manage these interfaces.

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USB-A
Connector
Mini-USB
Connector
SD
Connector
10-pin Header
Power
Management
Texas Instruments
Sitara AM335x
550MHz to 720MHz
Cortex-A8
HDMI Jack
+12V
UART Expansion
1
SD Card
PC
HID / Thumb drive
1/8" stereo
jack
Audio Line Out
TLV320AIC26
Filter
+3.3V
+5V
MityARM-335x Development Kit
+5V ISO 1 (CAN 1)
+5V ISO 2 (CAN 2)
LCD / Touch 34-pin
Header
(Optional) XGA LCD
10-pin Header
8 SAR ADC Inputs 0-10V Signal
Conditioning
TFP410
Transmitter
DB-9 Header
MityARM-335x
10-pin Header
UART Expansion
2
10-pin Header
CAN 1 ISO 1050
10-pin Header
CAN 2 ISO 1050
1/8" jack FilterMicrophone Input
RJ-45 &
Magnetics Ethernet PHY
Ethernet 10/100/1000
Modbus TCP
EtherCAT Master
Standard HDMI Display LCD
335x Module Serial Port
41-Pin Expansion
Header
I2c & SPI &
16 GPIO
(Optional) WiFI /BT
Or
GPIO Usage
RS232 Driver
Battery
(RTC)
Figure 1: MityARM-335x Development Kit Block Diagram
Additional details about the AM335x Sitara ARM MPU, available peripherals and their
features are provided in the data sheet at the TI website (www.ti.com/am335x).

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Feature Descriptions
RS-232 Interface Description ..........................................................................................5
Dual UART Expansion Port Description .........................................................................5
Audio Input/Output Description ......................................................................................5
USB 2.0 Interface Description.........................................................................................5
MultiMedia Card (SD) Interface Description...................................................................5
Gigabit Ethernet Interface Description.............................................................................5
XGA LCD with Touch Interface Description...................................................................6
HDMI (Video Only) Interface Description ......................................................................6
8-Channel Analog to Digital Converter Description.........................................................6
Dual CAN Interface Description......................................................................................6
Expansion Port Interface Description...............................................................................7
Boot Configuration Header Description...........................................................................7
TI JTAG Interface Description ........................................................................................7
Electrical Interface Descriptions
Input Power –J601..........................................................................................................9
Analog to Digital Converter Interface –J900...................................................................9
MultiMedia Card (SD) Interface –J501...........................................................................9
Auxiliary / LCD Interface –J401...................................................................................10
HDMI Interface –J400..................................................................................................12
Expansion Port Interface –J700 ....................................................................................12
Debug/Boot RS232 Interface –J507..............................................................................14
Dual CAN Interface –J503 & J504 ...............................................................................14
UART Expansion Interface Port0 - J506 (Use with 80-000450 and 80-000358).............15
UART Expansion Interface Port1 - J505 (Use with 80-000450 and 80-000358).............15
10/100/1000 Ethernet Interface –J200...........................................................................16
Audio Input/Output Interface –J300 and J301...............................................................16
Boot Configuration header –J106 .................................................................................17
TI JTAG Interface –J101..............................................................................................17

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RS-232 Interface Description
The on-board RS-232 level driver provides a standard serial interface at data rates up to
115,200 baud. The serial interface, J507, is routed to the primary MityARM serial
bootloading port, UART0, in order to allow remote code download and FLASH upgrades
on an attached MityARM from this connector.
Dual UART Expansion Port Description
The dual UART expansion ports each contain a set of TX and RX connections as well as
an enable GPIO from the MityARM-335x module. A custom user designed driver board
can be designed to provide any desired signaling or you can select an off-the-shelf
solution available from Critical Link for RS232 and RS485/422 drivers. Each MityARM-
335x Development includes both a RS232 and RS485/422 driver expansion kits, Table
18.
The electrical interfaces are provided via J505 and J506, 10-pin shrouded headers. HW
flow control is not supported on these interfaces.
Linux Driver and API examples are available to support the UART functionality.
Audio Input/Output Description
Standard 3.5mm / 1/8th inch audio jacks are provided for both stereo audio output and a
microphone audio input from/to a TLV320AIC26 16-bit audio CODEC connected to the
MityARM-335x module.
The electrical interfaces are provided via 1/8th inch jacks J300, Audio Out, and J301,
Microphone In.
Linux Driver and API examples are available to support the audio functionality.
USB 2.0 Interface Description
The on-board USB interface utilizes dedicated HOST, A type connector J502, and OTG,
mini B type connector J500, controllers inside Sitara processor. Linux drivers are
available.
MultiMedia Card (SD) Interface Description
The on-board MultiMedia Card (MMC) slot uses a Secure Digital connector J501 which
supports standard (3.3V) and SDHC (1.8V) cards up to 32GB. U-Boot configuration
information and Linux drivers are available.
Gigabit Ethernet Interface Description
The on-board Ethernet interface features a network PHY capable of running at
10/100/1000Mbit including link auto-negotiation and MII/MDIO capability. An industry
standard RJ-45 connector is provided for external connection. This Ethernet interface
may be used to perform remote code download via U-Boot and FLASH upgrades on an
attached MityARM-335x module.

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LCD with Touch Interface Description
The MityARM-335x Development Kit provides a flat-ribbon cable low profile Digital
Video Interface (DVI). In addition to custom user interfacing, the signals may be used to
interface to either a XGA (1024x768) or VGA (640x480) LCD screen using the
MityARM hardware and software development kit LCD interface libraries and an
appropriate daughterboard interface. Off-the-shelf display solutions for XGA or VGA
interfaces are provided by Critical Link.
Combining five of the interface pins with P400, P401 and P402 jumper settings allow for
SPI or up to 5-channel Analog based touch screen controls.
Note: ADC Channels 1 through 5 are shared with the Analog to Digital Converter
interface connections and are enabled or disabled depending on P402 and P401 jumpers.
The interface can also be customized to support 20 GPIO lines at +3.3V CMOS/LVTTL
signaling levels based on the AM335x configuration.
HDMI (Video Only) Interface Description
The MityARM-335x Development Kit provides a standard HDMI interface for external
monitor connection. With a maximum resolution of 2048 x 2048 the MityARM-335x
development kit can drive the display you need.
8-Channel Analog to Digital Converter Description
The on-board 8-channel analog to digital converter (ADC) accepts 0 to 10V input levels
through the 10-pin header, J900.
Note: Channels 1 through 5 are shared with the LCD analog touch interface connections
and are enabled or disabled depending on P402 and P401 jumpers.
Dual CAN Interface Description
The on-board CAN provides a set of CAN V2.0B compliant interfaces. These interfaces
are managed by the MityARM-335x module directly.
The galvanic isolation is provided by a dedicated TI ISO1050 transceiver for each
interface. The ISO1050 is powered by an isolated power supply with 1000V* isolation
from the primary supply.
Jumpers JP500 (CAN 1) and JP501 (CAN 0) can provide dedicated bus termination of
120Ohm. To enable termination, place shorting jumper across JP504.
The electrical interfaces are provided via J503 and J504, 10-pin shrouded headers.
Linux Driver and API examples are available to support CAN functionality.

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Expansion Port Interface Description
This 41-pin port can be used for a multitude of expansion functions. Both SPI and I2C
connections are available as well as 16 Address/Data pins with control logic. Both 1.8V
from the MityARM-335x module and 3.3V power supply connections are available on
the connector.
In addition to custom user interfacing Critical Link provides off-the-shelf add-on
modules for this port that include an 802.11 b/g/n with Bluetooth module.
Boot Configuration Header Description
The 335x Development Kit features a 12 bit, [0] to [11] series of boot configuration
jumpers, based off the LCD_DATA pins, to determine the search order of peripherals for
a valid boot image.
By default the MityARM-335x Development Kits is required to boot initially from the
MMC/SD card. Note that there are a total of 16 bits for the boot configuration with pins
[12] to [15] already pulled high/low on the MityARM-335x module.
TI JTAG Interface Description
The 14-pin JTAG header J101 is available onboard for debugging of the MityARM
AM335x module with a TI Emulator.

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ABSOLUTE MAXIMUM RATINGS
If Military/Aerospace specified cards are
required, please contact the Critical Link
Sales Office or unit Distributors for
availability and specifications.
Maximum Supply Voltage
13.2 V
Storage Temperature Range
0 to 80C
OPERATING CONDITIONS
Ambient Temperature
Range
0 to 70C
Humidity
0 to 95%
Non-condensing
ELECTRICAL CHARACTERISTICS
Symbol
Parameter
Conditions
Typical
Limit
Units
(Limits)
Maximum Power Supply Output
IMax
12V Supply (AC Adapter)1 all components
1.2
A
IMax
5.0V Supply2 for external components
1.0
A
IMax
3.3V Supply2 for external components
1.0
A
Power Dissipation
VS
Supply Voltage
12±5%
V
IS
Supply Current3
3301
mA
Notes:
1. An alternative higher amperage AC/DC 12V adapter is available upon request. Contact Critical Link for
details and ordering information.
2. The maximum current supplied to external components should be limited to the specified maximum for
both the 5.0V and 3.3V supplies.
3. Expansion card not attached, 100% ARM utilization, RS-232 and Ethernet are enabled and active.

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ELECTRICAL INTERFACE DESCRIPTIONS
Input Power –J601
The MityARM-335x Development Kit power interface, J601, requires a single +12Volt
power supply.
Table 1: Input Power Interface Pin Description
Signal
J601 Position
+12V
1
GND
2
Analog to Digital Converter Interface –J900
The MityARM-335x Development Kit provides an 8-channel Analog to Digital converter
(ADC). This 10-pin header, J900, has 8 ADC input pins and 2 ground pins, Figure 2
below and Table 2. It can accept voltage levels from 0 to 10V.
Note: Inputs 0 to 4 are shared with the LCD Interface and may not be used for both
functions simultaneously, see Table 4.
Table 2: J900 Connector Pin Assignments
Pin
Signal
SoM Pin Post Conversion1
Type
Standard
Notes
1
A_INP_7
198
I
Analog 0V to 10V
2
+12V
-
Power
200mA Max
Total external draw on 12V supply should
not exceed 800mA
3
A_INP_5
194
I
Analog 0V to 10V
4
A_INP_6
196
I
Analog 0V to 10V
5
A_INP_3
190
I
Analog 0V to 10V
6
A_INP_4
192
I
Analog 0V to 10V
7
A_INP_1
186
I
Analog 0V to 10V
8
A_INP_2
188
I
Analog 0V to 10V
9
GND
-
Power
10
A_INP_0
184
I
Analog 0V to 10V
Note 1: Each analog input pin passes through a series of OPAMPs to convert the 0V to
10V levels to 0V to 1.8V levels so that the MityARM-335x module can process them.
The “SoM Pin Post Scaling” is the pin after the OPAMPs and also after the headers of
Table 4 in the cases of inputs 0 to 4.
2 4 6 8 10
1 3 5 7 9
Figure 2: J900 Pin-out (Top View)
MultiMedia Card (SD) Interface –J501
The MityARM-335x Development Kit provides a MMC interface that uses a standard
Secure Digital (SD) card slot for the physical interface. Through the use of SD card
adapters MicroSD and MiniSD cards can be used in this slot. By default the slot is
supplied with 3.3V for use with standard SD cards and the R140 resistor can be de-
populated while R139 is populated to provide a 1.8V supply for SDHC cards.

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Auxiliary / LCD Interface –J401
The Auxiliary / LCD interface connector provides the necessary connections to connect
either an XGA or VGA display as well as pins to support touch screen controls. The
interface uses a standard 2mm 34 position male header. Table 3 defines the LCD
connector, J401, pin out which contains DVI signals that are routed directly from the
MityARM-335x to this connector.
There are also 5 interface pins that are used for the touch screen controls which can
support either SPI or Analog to Digital based interfaces depending on P400, P401 and
P402 jumper settings as defined in Table 3.
A ribbon cable using Molex 87568-3463 connector (or equivalent) can be used. There are
a variety of 2mm mating connectors that can be utilized.
Table 3: J401 Aux / LCD Interface Pin Description
Pin
Schematic Signal
SoM
Pin
Type
Standard
Notes
1
DVI R4
63
I/O
3.3V LVCMOS
Software configurable AM335x IO
2
DVI R3
61
I/O
3.3V LVCMOS
Software configurable AM335x IO
3
DVI R2
59
I/O
3.3V LVCMOS
Software configurable AM335x IO
4
DVI R1
57
I/O
3.3V LVCMOS
Software configurable AM335x IO
5
DVI R0
53
I/O
3.3V LVCMOS
Software configurable AM335x IO
6
DVI G5
51
I/O
3.3V LVCMOS
Software configurable AM335x IO
7
DVI G4
49
I/O
3.3V LVCMOS
Software configurable AM335x IO
8
DVI G3
47
I/O
3.3V LVCMOS
Software configurable AM335x IO
9
DVI G2
45
I/O
3.3V LVCMOS
Software configurable AM335x IO
10
DVI G1
43
I/O
3.3V LVCMOS
Software configurable AM335x IO
11
DVI G0
41
I/O
3.3V LVCMOS
Software configurable AM335x IO
12
DVI B4
39
I/O
3.3V LVCMOS
Software configurable AM335x IO
13
DVI B3
35
I/O
3.3V LVCMOS
Software configurable AM335x IO
14
DVI B2
33
I/O
3.3V LVCMOS
Software configurable AM335x IO
15
DVI B1
31
I/O
3.3V LVCMOS
Software configurable AM335x IO
16
DVI B0
29
I/O
3.3V LVCMOS
Software configurable AM335x IO
17
GND
-
Power
-
18
GND
-
Power
-
19
DVI CLK
65
I/O
3.3V LVCMOS
Software configurable AM335x IO
20
DVI DE
71
I/O
3.3V LVCMOS
Software configurable AM335x IO
21
DVI HSYNC
69
I/O
3.3V LVCMOS
Software configurable AM335x IO
22
DVI VSYNC
67
I/O
3.3V LVCMOS
Software configurable AM335x IO
23
GND
-
Power
-
24
GND
-
Power
-
25
+12V
-
Power
200mA max
Total external draw on 12V supply should
not exceed 800mA
26
+5.0V
-
Power
200mA max
Total external draw on 5V supply should not
exceed 1000mA
27
+3.3V
-
Power
200mA max
Total external draw on 3.3V supply should
not exceed 1000mA
28
BACKLIGHT_PWM
152
I/O
3.3V LVCMOS
Software configurable AM335x IO
29
SPI0 D1/A2D 0
185/184
I/O
3.3V or 0 to 10V ADC
Touch Screen SPI or ADC - Table 4
30
SPI0 D0/A2D 1
183/186
I/O
3.3V or 0 to 10V ADC
Touch Screen SPI or ADC - Table 4
31
SPI0 SCLK/A2D 2
187/188
I/O
3.3V or 0 to 10V ADC
Touch Screen SPI or ADC - Table 4
32
SPI0 CS0/A2D 3
191/190
I/O
3.3V or 0 to 10V ADC
Touch Screen SPI or ADC - Table 4
33
TS IRQ N/A2D 4
201/192
I/O
3.3V or 0 to 10V AD
Touch Screen SPI or ADC - Table 4
34
TS BUSY
203
I/O
3.3V LVCMOS
Software configurable AM335x IO
Note: These signals are pin-muxed in the CPU and may be available for a variety of functions.

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Table 4: J104 Aux / LCD Interface Touch Screen Pin Description
Pin
P400
P401
P402
Notes
SPI Touch Only
Jumpered
-
-
Figure 3
ADC Touch Only
-
Jumpered
-
Figure 4
ADC J900 Only
-
-
Jumpered
Figure 5
ADC J900 and SPI Touch
Jumpered
-
Jumpered
Figure 6
Figure 3: P400 - SPI Touch Only
Figure 4: P401 - ADC Touch Only
Figure 5: P402 –ADC J900 Only
Figure 6: P400 and P402 - ADC J900 and
SPI Touch

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HDMI Interface –J400
The MityARM-335x Development Kit provides a 19-pin standard HDMI connector with
video only, J400. Supporting HDMI 1.3, the MityARM-335x can output up to a
resolution of 2048 x 2048 pixels.
Table 5: J400 Connector Pin Assignments
Pin
Signal
Type
Standard
Notes
1
TMDS Data2+
O
2
Shield
Power
3
TMDS Data2-
O
4
TMDS Data1+
O
5
Shield
Power
6
TMDS Data1-
O
7
TMDS Data0+
O
8
Shield
Power
9
TMDS Data0-
O
10
TMDS Clock+
O
11
Shield
Power
12
TMDS Clock-
O
13
Reserved (CEC)
-
14
Reserved
-
15
Reserved (DDC Data/SDA)
-
16
Reserved (DDC Clock/SCL)
-
17
GND
Power
18
+5.0V
Power
19
Hot Plug Detect
O
Expansion Port Interface –J700
The MityARM-335x Development Kit provides a single 41-pin general expansion
connector on the bottom of the board. A Hirose DF9-41P-1V(32) connector is used and
mates with a Hirose DF9A-41S-1V(22) (or equivalent) connector.
This expansion interface can be used for many different add-on cards due to it having
I2C, SPI and 16 General Purpose Memory Controller (GPMC) Address/Data pins with
control signals directly from the MityARM-335x module. Two 3.3V Supply pins are
provided on the connector as well as a 1.8V connection from the MityARM-335x module
itself.
In addition to custom user interfacing Critical Link provides off-the-shelf add-on
modules for this port that include an 802.11 b/g/n with Bluetooth module.
Table 6 provides signal descriptions for each pin.

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Table 6: J700 Connector Pin Assignments
Pin
Schematic Signal
SoM Pin
Type
Standard
Notes
1
GPMC_AD15
107
I/O
3.3V LVCMOS
Software configurable GPIO
2
+3.3V
-
Power
-
250mA Max (Per pin)
3
GPMC_AD14
105
I/O
3.3V LVCMOS
Software configurable GPIO
4
+3.3V
-
Power
-
250mA Max (Per pin)
5
GPMC_AD13
103
I/O
3.3V LVCMOS
Software configurable GPIO
6
GND
-
Power
-
7
GPMC_AD12
101
I/O
3.3V LVCMOS
Software configurable GPIO
8
GPMC_CS1_N
113
I/O
3.3V LVCMOS
Software configurable GPIO
9
GPMC_AD11
99
I/O
3.3V LVCMOS
Software configurable GPIO
10
GPMC_CS2_N
111
I/O
3.3V LVCMOS
Software configurable GPIO
11
GPMC_AD10
97
I/O
3.3V LVCMOS
Software configurable GPIO
12
GPMC_WP_N
104
I/O
3.3V LVCMOS
Software configurable GPIO
13
GPMC_AD9
95
I/O
3.3V LVCMOS
Software configurable GPIO
14
GPMC_BEN1
102
I/O
3.3V LVCMOS
Software configurable GPIO
15
GPMC_AD8
93
I/O
3.3V LVCMOS
Software configurable GPIO
16
GPMC_WAIT0
100
I
3.3V LVCMOS
Software configurable GPIO
17
GPMC_AD7
89
I/O
3.3V LVCMOS
Software configurable GPIO
18
GND
-
Power
-
19
GPMC_AD6
87
I/O
3.3V LVCMOS
Software configurable GPIO
20
GPMC_WE_N
98
I/O
3.3V LVCMOS
Software configurable GPIO
21
GPMC_AD5
85
I/O
3.3V LVCMOS
Software configurable GPIO
22
GPMC_CS3_N
94
I/O
3.3V LVCMOS
Software configurable GPIO
23
GPMC_AD4
83
I/O
3.3V LVCMOS
Software configurable GPIO
24
GPMC_OEN_RE_N
90
I/O
3.3V LVCMOS
Software configurable GPIO
25
GPMC_AD3
81
I/O
3.3V LVCMOS
Software configurable GPIO
26
GPMC_ADVN_ALE
88
I/O
3.3V LVCMOS
Software configurable GPIO
27
GPMC_AD2
79
I/O
3.3V LVCMOS
Software configurable GPIO
28
GPMC_BEN0_CLE
86
I/O
3.3V LVCMOS
Software configurable GPIO
29
GPMC_AD1
77
I/O
3.3V LVCMOS
Software configurable GPIO
30
GPMC_CLK
84
O
3.3V LVCMOS
Software configurable GPIO
31
GPMC_AD0
75
I/O
3.3V LVCMOS
Software configurable GPIO
32
GND
-
Power
-
33
GND
-
Power
-
34
VIO_1P8
-
Power
-
1.8V direct from MityARM-335x module
35
Reserved
-
-
-
36
SPI1_D1_MISO
197
I
3.3V LVCMOS
Software configurable GPIO
37
GPIO3_14
122
I/O
3.3V LVCMOS
Software configurable GPIO
38
SPI1_D0_MOSI
195
O
3.3V LVCMOS
Software configurable GPIO
39
I2C0_SDA
177
I/O
3.3V LVCMOS
Software configurable GPIO
40
SPI1_SCLK
193
O
3.3V LVCMOS
Software configurable GPIO
41
I2C0_SCL
179
I/O
3.3V LVCMOS
Software configurable GPIO
Note that these signals are pin-muxed in the CPU and may be available for a variety of
functions.
1The I2C bus controlled by MityARM hardware. Slave address 0x90 reserved for Power Management
Controller IC, I2C1. User should not attempt to write any data to this address as it will result in module
damage.

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Expansion Port Naming Description
Table 7: J700 Expansion Port Signal Description
Signal
Type
Standard
Notes
GPMC_CS#_N
I/O
3.3V CMOS
Chip select signals to MityARM
GPMC_AD##
I/O
3.3V CMOS
GPMC Address/Data Direct Interface to
MityARM-335x Module
GPMC_CLK
O
3.3V CMOS
GPMC Clock output maximum 100Mhz
GPMC_Wait0
I
3.3V CMOS
GPMC Wait0 signal to MityARM-335x
Module
GPMC_XXXX_XXX
I/O
3.3V CMOS
Other GPMC control I/O signals to
MityARM-335x Module
SPI1_D1_MISO
I
3.3V CMOS
SPI input signal
SPI1_SCLK &
SPI1_DO_MOSI
O
3.3V CMOS
SPI output signals
I2C0_XXX
I/O
3.3V CMOS
I2C bus signals
Debug/Boot RS232 Interface –J507
Table 8: J507 DB9 Connector Pin Assignments
Pin
Signal
Type
Standard
Notes
1
RESERVED
-
-
2
BOOT_RS232_RX
O
RS232
RS232 RX to MityARM Debug Port
3
BOOT_RS232_TX
I
RS232
RS232 TX from MityARM Debug Port
4
RESERVED
-
-
5
GND
Power
-
RS232 Ground
6
RESERVED
-
-
7
RESERVED
-
-
8
RESERVED
-
-
9
RESERVED
-
-
Dual CAN Interface –J503 & J504
Table 9: J503 CAN1 & J504 CAN0 Connector1Pin Assignments
Pin
Signal
Type
Standard
Notes
1
RESERVED
-
-
2
CANL
I/O
CAN Bus Signal L
3
GND_ISOCANx2
Power
-
CAN Bus Isolated Ground
4
RESERVED
-
-
5
RESERVED
-
-
6
RESERVED
-
-
7
CANH
I/O
CAN Bus Signal H
8
RESERVED
-
-
9
+5V_CANx2
Power
-
Isolated +5V Output, 20mA Max
10
RESERVED
-
-
Note 1: Please see Figure 7 for physical pin-out of connector
Note 2: The ‘x’ at the end of the signal names is either a 1 or a 0 depending on which
CAN interface you are using.

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UART Expansion Interface Port0 - J506 (Use with 80-000450 and 80-000358)
Table 10: J506 Connector Pin Assignments
Pin
Schematic Signal
SoM Pin
Type
Standard
Notes
1
EXPANSION0_TX_ENB
114
I/O
Software configurable MityARM-335x GPIO
2
EXPANSION0_RX
165
O
Software configurable MityARM-335x GPIO
3
+3.3V
-
Power
200mA Max
Total external draw on 3.3V supply should not
exceed 1000mA
4
RESERVED
-
-
5
RESERVED
-
-
6
EXPANSION0_TX
167
I
Software configurable MityARM-335x GPIO
7
RESERVED
-
-
8
GND
-
Power
9
RESERVED
-
-
10
RESERVED
-
-
Notes: Please see Figure 7 for physical pin-out of connector
UART Expansion Interface Port1 - J505 (Use with 80-000450 and 80-000358)
Table 11: J506 Connector Pin Assignments
Pin
Schematic Signal
SoM Pin
Type
Standard
Notes
1
EXPANSION1_TX_ENB
126
I/O
Software configurable MityARM-335x GPIO
2
EXPANSION1_RX
118
O
Software configurable MityARM-335x GPIO
3
+3.3V
-
Power
200mA Max
Total external draw on 3.3V supply should not
exceed 1000mA
4
RESERVED
-
-
5
RESERVED
-
-
6
EXPANSION1_TX
116
I
Software configurable MityARM-335x GPIO
7
RESERVED
-
-
8
GND
-
Power
9
RESERVED
-
-
10
RESERVED
-
-
Notes: Please see Figure 7 for physical pin-out of connector
2 1345
789 6
10
Figure 7: J503, J504, J505 and J506 Pin-out (Top View)

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10/100/1000 Ethernet Interface –J200
The MityARM-335x Development Kit provides a RJ-45 connection for a Gigabit
10/100/1000 Ethernet connection. This connection follows standard TIA/EIA-568B pin-
out as shown in Table 12 below. The Ethernet PHY will auto negotiate to the speed of the
device it is connected to.
Table 12: J200 Ethernet RJ45 Pin Assignments
Pin
Signal
Type
Standard
Notes
1
TXVA_P
I/O
2
TXVA_N
I/O
3
TXVB_P
I/O
4
TXVB_N
I/O
5
TXVC_P
I/O
6
TXVC_N
I/O
7
TXVD_P
I/O
8
TXVD_N
I/O
Audio Input/Output Interface –J300 and J301
The MityARM-335x Development Kit provides both an Input, biased microphone, and
Output, L/R stereo speaker connections. The 3.5mm/1/8” connections are through J300
for output and J301 for input with the pin-outs shown below.
Table 13: J300 Audio Output Pin Assignments
Pin
Signal
Type
Standard
Notes
Tip
Audio Out Left
O
Unbalanced audio output
Ring
Audio Out Right
O
Unbalanced audio output
Sleeve
GND
Power
Audio Ground
Table 14: J301 Audio Output Pin Assignments
Pin
Signal
Type
Standard
Notes
Tip
Mic Bias
O
2.2V bias from TLV320AIC26
Ring
Mic Input
I
Sleeve
GND
Power
Audio Ground

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Boot Configuration header –J106
The boot mode, as determined by the 12 BOOTCONFIG pins, is selected on the rising
edge of the PWRONRSTn Reset Input Pin of the AM335x processor which is controlled
by the PMIC of the MityARM-335x module. Each boot configuration pin on the
development kit is connected to a weak pull up, ‘1’, unless a jumper is placed across the
header pins which pulls that configuration pin down to ground, ‘0’.
The MityARM-335x Development Kits default boot configuration header mode is shown
in Figure 8 below. As seen this equates to a boot configuration setting of [0] to [11],
111011111111. Please reference the AM335x Technical Reference Manual for
complete details on how the vast array of boot mode options.
There are a total of 16 boot configuration pins that are registered by the AM335x
processor however [12] to [15] are fixed, 0010, on the MityARM-335x module.
Figure 8: Default Development Kit Boot Jumper Mode
TI JTAG Interface –J101
Table 15: J101 JTAG Pin Assignments
Pin
Schematic Signal
SoM Pin
Type
Standard
Notes
1
TMS
172
2
TRST_N
174
3
TDI
168
4
GND
-
Power
5
+3.3V
-
Power
6
Key
-
-
-
7
TDO
170
8
GND
-
Power
9
TCK_RET
166
10
GND
-
Power
11
TCK
166
12
GND
-
Power
13
EMU0
160
14
EMU1
162

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Included Components
The following table lists the components that are included with a MityARM-335x
Development Kit. See Table 17 for specific development kit ordering information and
Table 18 for expansion kit ordering information.
Table 16: Included Items
Description
Interface Port
Qty. Included
MityARM-335x Development Kit Board
n/a
Qty. 1
MityARM-335x Module
n/a
Qty. 1
Serial cable M/F
J507
Qty. 1
RS485/422 Expansion Kit
J505 and J506
Qty. 1
RS232 Expansion Kit
J505 and J506
Qty. 1
12V 1.2A AC to DC Supply
J601
Qty. 1
Ethernet cable –7 foot
J200
Qty. 1
USB Drive with Development Environment
n/a
Qty. 1
Development Kit Schematic Files
n/a
Development Kit Gerber Drawings
n/a
Development Kit Bill Of Materials
n/a
MityARM-335x Development Kit Board with MityARM-335x Module
12V Input Power
Console
RS-232
CAN
(Isolated)
LCD
USB OTG
Gigabit
Ethernet
Audio Line In
and Out USB
Serial
Expansion (x2)
RS-232, RS-485,
or RS-422
HDMI
MityARM-335x System on Module Analog Input (x8)
0V –10V
ARM JTAG
Option
Jumpers
Boot Option
Jumpers
WiFi Expansion and SD
Card on Bottom Side

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ORDERING INFORMATION
Development Kits
The following table lists the standard MityARM-335x Development Kit configurations.
For shipping status, availability, and lead time of these or other configurations please
contact your Critical Link representative.
Table 17: Standard Model Numbers
Development Kit Model
Module Included
Operating Temp
80-000512
3359-GX-226-RC
0oC to 70o C
80-000587
3354-GX-X38-RC
0oC to 70o C
Expansions Kits
The following table lists the standard expansion kits for the above development kits. For
shipping status, availability, and lead time of these or other configurations please contact
your Critical Link representative.
Table 18: Standard Expansion Kit Numbers
Expansion Kit
Model
Type
Interface Port
80-000541
RS232
J505 and J506
80-000540
RS485/422
J505 and J506
80-000535
WiFi 802.11b/g/n
w/ Bluetooth
J700
Contact Us
XGA LCD w/Resistive Touch
Screen and Driver Board
J401
Contact Us
VGA LCD w/Resistive Touch
Screen and Driver Board
J401

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MECHANICAL INTERFACE DESCRIPTION
Main Board Interface / Mounting
3.750
0.140
0.140
5.200
2.080
8x Ø .130
3.610
5.060
0.900
1.435
2.885
1
3
2
2
4
1
3
34
41
40
J700 Bottom Side
(2.202;1.8699) (2.202;2.7793)
(2.1205;1.401)
(0.9395;1.401) J401 Top Side
33
Figure 9: MityARM-335x Development Kit Outline, Mounting Hole Locations,
Hirose DF9-41P-1V(32) expansion header J700 and Molex 87832-3420 LCD header J401
(Top View, inches)
REVISION HISTORY
Date
Change Description
29-FEB-2012
Initial revision.
15-MAR-2012
Updates and changes from review.
12-APR-2013
Added boot jumper information and revised available
development kit part numbers.