Eurotech Bitsy G5 User manual

www.eurotech.com
Rev A – July 2011 – 110121-4001A
USER MANUAL
Bitsy G5
i.MX31 Single Board Computer

Disclaimer
The information in this document is subject to change without notice and should not be construed as a commitment
by any Eurotech company. While reasonable precautions have been taken, Eurotech assumes no responsibility for
any error that may appear in this document.
Trademarks
All product or service names are the property of their respective owners.
Revision History
Issue no.
PWB
Date
Comments
1
Aug-2007
Preliminary release
Sections 1,2, 3, and 7
2
Sept-2007
Second preliminary release
3
Sept-2009
Third preliminary release
Eurotech style update
A
July-2011
Initial release
© 2009 Eurotech Inc.
For contact details, see page 22.

Contents
110121-4001A 3
Contents
1Introduction.......................................................................................................................................5
1.1 Overview ...............................................................................................................................5
1.2 Features..................................................................................................................................5
1.2.1 Processor......................................................................................................................5
1.2.2 Power Supply...............................................................................................................5
1.2.3 Memory .......................................................................................................................5
1.2.4 Communications..........................................................................................................6
1.2.5 User Interface and Display ..........................................................................................6
1.2.6 I/O................................................................................................................................6
1.2.7 Audio Interface ............................................................................................................6
1.3 Block Diagram.......................................................................................................................7
2Getting Started ..................................................................................................................................8
2.1 Development Systems ...........................................................................................................8
2.1.1 System Components ....................................................................................................8
2.1.2 Bitsy G5 Personality Board .........................................................................................8
2.2 Frequently Asked Questions..................................................................................................9
2.3 Errata, Addenda and Further Information..............................................................................9
3Hardware Reference........................................................................................................................10
3.1 Switches, Controls and Indicators .......................................................................................10
3.1.1 S1: DIP Switch .........................................................................................................10
3.1.2 D9: Green LED Indicator .........................................................................................10
3.2 Jumper Settings ...................................................................................................................10
3.2.1 JP2: LCD Display Power Select ...............................................................................10
3.3 Signal Connectors................................................................................................................11
3.3.1 J1 (J8): LCD Panel Interface Connector...................................................................11
3.3.2 J2 (J3): PCMCIA ......................................................................................................12
3.3.3 J3 (J9): Power, I/O, Serial 2 & 3, USB, Touch Screen and others ...........................12
3.3.4 J7 (J2): I2C and SD/MMC ........................................................................................14
3.3.5 J9 (J4): Expansion Bus .............................................................................................14
3.3.6 J10 (J5): ADSmartIO, USB, Serial 1, Stereo Audio, I/Os ........................................16
3.3.7 J11 (J7): Supercapacitor Input ..................................................................................17
3.3.8 J16 (J1): JTAG/In-System Programming .................................................................17
4Board Revision History...................................................................................................................18
4.1 Identifying the board revision..............................................................................................18
4.2 Revision History..................................................................................................................18
4.2.1 Revision 2 ..................................................................................................................18
New Features......................................................................................................18
Changes..............................................................................................................18

Bitsy G5 User Manual
4 110121-4001A
4.2.2 Revision 3 ..................................................................................................................21
4.2.3 Revision A .................................................................................................................21

Introduction
110121-4001A 5
1 Introduction
1.1 Overview
The Bitsy G5 is a full-featured single board computer using the Freescale i.MX31 multimedia
applications processor. The Bitsy G5 is designed to meet the needs of embedded and graphical
systems developers.
This manual applies to the latest revision of the Bitsy G5, as listed in Section 7.2.
1.2 Features
1.2.1 Processor
•Freescale i.MX31 32-bit ARM RISC Processor
•ARM1136JF-S core with Vector Floating Point Coprocessor and Multi-level Cache
System
•Multimedia support including VGA MPEG-4 Hardware Encoder, Image Processing Unit
and Graphics Accelerator
•Clock rates up to 532 MHz
1.2.2 Power Supply
•6-15 V main power input
•Freescale MC13783 Power Management and Audio Circuit
1.2.3 Memory
•128 MB DDR SDRAM
•32 MB NOR Flash memory 1
•PCMCIA, Type I and II, 3.3 and 5 V
•Battery-backed real-time clock
1The Bitsy G5 supports up to 64 MB of NOR flash memory.

Bitsy G5 User Manual
6 110121-4001A
1.2.4 Communications
•USB 2.0 Host port supporting high (480 Mbps), full (12 Mbps) and low (1.5 Mbps)
speeds
•On-The-Go (OTG) port supporting full and low speeds
•Three Serial ports
Serial 1: EIA-232 (9-wire)2
Serial 2: 3.3 V logic level (3-wire)3
Serial 3: EIA-232 (5-wire)2
•I2C bus with I2C master device
•Serial Peripheral Interface (SPI) port
•Secure Digital (SD/SDIO) and Multimedia Card (MMC) support
•Expansion bus
•10/100BT Ethernet, RJ45 with optional personality board
1.2.5 User Interface and Display
•Flat Panel interface
•Analog Touch Panel interface (four- or five-wire options)
1.2.6 I/O
•Nine ADSmartIOTM ports configurable for digital I/O, A/D inputs (up to four) and/or up
to 4x5 keypad
•Ten digital I/Os
•Backlight control signals for Intensity and On/Off
1.2.7 Audio Interface
•Codec implemented by Freescale MC13783 Power Management and Audio Circuit
•Stereo microphone input
•Stereo 1W speaker outputs
•Headphone output with optional personality board
2A 3.3 V logic level configuration is available as a volume production option.
3Optional personality board supports EIA-232 levels on Serial 2.

Introduction
110121-4001A 7
1.3 Block Diagram
The following diagram illustrates the system organization of the Bitsy G5.Arrows indicate the
direction of control and not necessarily signal flow. Optional circuitry is drawn with dotted lines.
Connector reference designators given are for the Bitsy family products. Connector reference
designators on the Bitsy G5 are labeled differently and are shown as (Jx).
The diagram also illustrates the Bitsy G5 Personality Board.See Section 2.1.2 for additional
details about the personality board.
Ethernet
DDR SDRAM and
Flash Memory
Audio I/F
System Bus
+
Bitsy G5
J9
USB Host
Power
Supply
Personality Board
J10
PCMCIA
J1
J13
buffers
Serial 1
Serial 2
Serial 3
LCD
buffers
buffers
Freescale
i.MX31
SD/MMC
digital I/O
amp
I2C
Touch Panel
Controller
USB OTG
buffers
LCD
Serial 2
Serial 3
Serial 1
JP4-5
J18
J22
J20
J31
J16
J9
J43
J12
J44
J45
USB Function
Backlight
Touch panel
Power input
/IRDAON
J36
Wakeup
USB Host
System
Controller
Logic
buffers
buffers
J24
J2
J10
Reset button
I/O
J3 J3J1
ADSmartIO
J37
J11
J6
J34
Power
Supplies
Touch Panel
Controller
RTC
Codec
Interfaces
BATTPOS
preamp
MIC_IN
SPKR
SPKR
MIC_IN
BATTPOS
xcvr
I2C
Board Power
SPI1.0
SPI2.0
MC13783
(J8) (J9)
(J3)
xcvr
digital I/O
SPI1.1
digital I/O
SPI2.2
J7
SD/MMC
J21
J19
(J5)(J4)
J8
(J2)
LED
Backlight
I2C/SPI
SW1
I2C
I/O

Bitsy G5 User Manual
8 110121-4001A
2 Getting Started
2.1 Development Systems
Bitsy G5 boards are shipped as development systems designed to get the developer up and running
quickly.
To use the system, simply plug the power supply into the mini DIN-8 receptacle on the system.
If the screen does not display anything after five to ten seconds, check the Frequently Asked
Questions, below. Most operating systems cold boot within twenty seconds.
2.1.1 System Components
A typical development system is shown at right. It consists of the following components:
•Bitsy G5 single-board computer
•Bitsy G5 Personality Board
•Flat panel display and cable
•Backlight inverter and cable
•Touch screen and cable
•100-240 VAC power adapter
•Plexiglas mounting
•Developer's Cable Kit including
•Serial Port DB9 adapter (Eurotech cable #610111-80001)
•DB9F/F null modem cable
•USB A-B cable
•Operating system of your choice
•User's Guide (this document and operating system guide)
Please make sure you have received all the components before you begin your development.
2.1.2 Bitsy G5 Personality Board
The Bitsy G5 often works in tandem with another board to add functionality and customize the
system for its application. The Bitsy G5 Personality Board adds custom circuits and locates
connectors best suited for the application design.
Signals from the Bitsy G5 are brought out to standard interface connectors and dedicated headers.
Connectivity is included for a wide range of functions including power, touch panel, USB, serial,
backlight, I2C, SPI, SD/MMC, LCD display and audio.A reset button is provided also.
The personality board expands the Bitsy G5 functionalities. An Ethernet chip and associated line
drivers connected to the Bitsy G5 expansion bus provide Ethernet capability. An EIA-232 option
is included for the Serial 2 port. Likewise, an optional step-up DC/DC converter can be populated
to drive up to 20 White LED backlights.

Getting Started
110121-4001A 9
2.2 Frequently Asked Questions
The following are some of the most commonly asked questions about development systems:
Q: When I plug in power, my screen is white and nothing comes up on it.
A: Check the connector seating. The flat panel connector may have come loose in shipping.
Press it firmly into the panel and reapply power to your system.
Q: Is there online support?
A: Yes. Information about the Bitsy G5 hardware and software is available on the Eurotech
support site at http://www.eurotech-inc.com. See Section 2.3 for further details.
Q: When I plug in power, the LED doesn't turn on.
A: Your system may still be booting. The LED is software-controlled and is not necessarily
turned on at boot.
Q: Do I have to turn off the system before I insert a PCMCIA?
A: No. The Bitsy G5 supports hot-swapping of PCMCIA cards. Consult the operating system
documentation for details.
Q: Do I need to observe any ESD precautions when working with the system?
A: Yes. If possible, work on a grounded anti-static mat. At a minimum, touch an electrically
grounded object before handling the board or touching any components on the board.
Q: What do I need to start developing my application for the system?
A: You will need a flash ATA card (32 MB or larger, 128 MB recommended) and the cables
supplied with your system to interface your development station to the system. For further
direction, consult the Eurotech guide for the installed operating system.
Q: Who can I call if I need help developing my application?
A: Eurotech provides technical support to get your development system running. For customers
who establish a business relationship with Eurotech, we provide support to develop applications
and drivers.
Q: Can I upgrade the version of the operating system?
A: Yes. Eurotech provides regular operating system updates on its developers' web site. For
operating systems not maintained by Eurotech, contact the operating system vendor.
Q: I would like to interface to a different display panel. How can I do this?
A: Eurotech may have already interfaced to the panel of which you are interested. Consult
Eurotech for availability.
2.3 Errata, Addenda and Further Information
Errata and addenda to this manual are posted on the Eurotech support forums along with the latest
release of the manual. Consult the support forums any time you need further information or feel
information in this manual is in error. You may access the forums from the Eurotech support site,
http://www.eurotech-inc.com
In addition to manuals, the support forums include downloads, troubleshooting guides, operating
system updates and answers to hundreds of questions about developing applications for Eurotech
products. You may also post questions you have about Eurotech products on the forums.

Bitsy G5 User Manual
10 110121-4001A
3 Hardware Reference
This section gives an overview of the hardware features of the Bitsy G5. The overview includes a
description of the switches, jumper settings, connectors, and connector pinouts.
Many connectors and headers have a visible number or marking on the board that indicates pin 1.
As seen from the component side, double-row headers on the board are
numbered as shown in the figure to the right.
If that pin is not clearly marked, there are two ways to locate pin 1:
1. For through-hole connectors, look at the underside of the board. The square pad is pin 1.
2. For surface-mount connectors, look for numbers silk screened on the component side of the
Bitsy G5. The "component side" of the Bitsy G5 is the one on which the PCMCIA ejector is
installed.
3.1 Switches, Controls and Indicators
3.1.1 S1: DIP Switch
S1 is a two-position DIP switch located on the edge of the board at the opening of the PCMCIA
socket. When in the "ON" position, switches are closed and connect to ground. Otherwise, they
are pulled up.
DIP switch positions "1" and "2" connect to the i.MX31. Most operating systems on the Bitsy G5
reserve these switches for their use. Consult the operating system manual for details.
3.1.2 D9: Green LED Indicator
The Bitsy G5 has one onboard green light-emitting diode (LED), located on the corner of the
board next to JP2, that is controlled by the processor. The LED is driven by the same buffers as
the display driver data lines. The LED will be off when the display buffers are disabled.
3.2 Jumper Settings
There is one user-selectable jumper on the Bitsy G5. It uses a 2 mm shorting block (shunt) to
select the setting. Turn off power to the Bitsy G5 before changing the position of a shunt.
3.2.1 JP2: LCD Display Power Select
Type: 3-post header, 2 mm
This jumper selects the supply voltage for the LCD display. The three-pin header is located near
the PCMCIA ejector button.
Jumper Setting Voltage Selected
1-2 Vcc (5.0 V)
2-3 Vddx (3.3 V)
WARNING! The pin out of JP2 on the Bitsy G5 is not the same as the pin out for the BitsyXb.
Make sure you have selected the correct voltage before connecting the panel. Flat panels can be
irreparably damaged by incorrect voltages.
2 4 6 8...
1 3 5 7...

Hardware Reference
110121-4001A 11
3.3 Signal Connectors
The following tables describe the electrical signals available on the connectors of the Bitsy G5.
Each section provides relevant details about the connector including part numbers, mating
connectors, signal descriptions, and references to related chapters.
Legend:
n/c Not connected
GND Bitsy G5 ground plane
(4.1) Reference section(s) for signals
Signal Types:
I signal is an input to the system
O signal is an output from the system
IO signal may be input or output
P power and ground
A analog signal
OC open collector output
The reference designators on the Bitsy G5 are labeled differently than the previous four
generations of Bitsy family products or mating personality boards. The reference designators for
the Bitsy family products are given in the following sections with the Bitsy G5 reference
designators shown as (Jx).
3.3.1 J1 (J8): LCD Panel Interface Connector
Board Connector: 2x17 shrouded header, 2 mm, Samtec STMM-117-02-G-D
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-117-02-F-D-500)
The following table describes the signals on the LCD panel interface connector. Signal names
shown are for TFT active matrix color LCDs at 18 bpp (bit-per-pixel). Signals from the i.MX31
are buffered and RFI filtered before reaching J1 (J8). The LCD panel output buffers operate at a
fixed 3.3 V.
Pin
i.MX31
Signal Name
Color Active TFT Display at 18bpp
Eurotech Signal
Name
Description
1
n/c
2
GND
ground
3
FPSHIFT
PNL_PIXCLK
Pixel Clock
4
HSYNC
PNL_HSYNC
Horizontal Sync
5
VSYNC3
PNL_VSYNC
Vertical Sync
6
GND
ground
7
LD12
PNL_RED0
Red Bit 0
8
LD13
PNL_RED1
Red Bit 1
9
LD14
PNL_RED2
Red Bit 2
10
LD15
PNL_RED3
Red Bit 3
11
LD16
PNL_RED4
Red Bit 4
12
LD17
PNL_RED5
Red Bit 5
13
GND
ground
14
LD6
PNL_GREEN0
Green Bit 0
15
LD7
PNL_GREEN1
Green Bit 1
16
LD8
PNL_GREEN2
Green Bit 2
17
LD9
PNL_GREEN3
Green Bit 3
18
LD10
PNL_GREEN4
Green Bit 4

Bitsy G5 User Manual
12 110121-4001A
Pin
i.MX31
Signal Name
Color Active TFT Display at 18bpp
Eurotech Signal
Name
Description
19
LD11
PNL_GREEN5
Green Bit 5
20
GND
ground
21
LD0
PNL_BLUE0
Blue Bit 0
22
LD1
PNL_BLUE1
Blue Bit 1
23
LD2
PNL_BLUE2
Blue Bit 2
24
LD3
PNL_BLUE3
Blue Bit 3
25
LD4
PNL_BLUE4
Blue Bit 4
26
LD5
PNL_BLUE5
Blue Bit 5
27
GND
ground
28
DRDY0
PNL_LBIAS
Data Enable
29
PNL_PWR Vcc (5 V) or 3.3 V (3.2.1)
30
31 PNL_RL
Horizontal mode select
(set by R247 or R246)4
32 PNL_UD
Vertical mode select
(set by R248 or R249)
4
33
reserved
34
ADSmartIO
(PD4)
VCON
low-voltage adjust for contrast
control of some displays
3.3.2 J2 (J3): PCMCIA
Integrated Ejector: FCI 95620-050CA
The 68-pin PCMCIA socket conforms to the PCMCIA standard for 5V-tolerant Type II cards, and
can also be run at 3.3 V. Normally, the socket is de-energized. The operating system is
responsible for turning on the socket when a card is inserted and turning it off when the card is
removed. Ejector hardware is standard. Vpp (pins 18 and 52), which is 12 V in older PCMCIA
implementations, is left unconnected in this implementation.
3.3.3 J3 (J9): Power, I/O, Serial 2 & 3, USB, Touch Screen and others
Board Connector:2x25 shrouded header, 2 mm, Samtec STMM-125-02-G-D
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-125-02-F-D-500)
Pin
Name
Pin
Type
Description
1
EIO9
IO
General-purpose Digital I/Os
EIO8
2
IO
3
EIO7
IO
GND
4
P ground
6
VCC
8
PO 5 V
10
5
reserved
7
reserved
9
/IRDAON
O
External IRDA control
4The LCD panel scan direction is selected by changing the voltage on the PNL_RL and PNL_UD
signals. These signals are pulled up on standard Bitsy G5 boards.

Hardware Reference
110121-4001A 13
Pin
Name
Pin
Type
Description
11
TSPX
AIO
right
UL
Touch screen
13
TSMY
AIO
top
LR
15
TSMX
AIO
left
LL
17
TSPY
AIO
bottom
UR
EIO5
12
IO
General-purpose Digital I/Os
EIO6
14
IO
BACKLIGHT
PWM
16 AO Backlight Intensity
/BACKLIGHT
ON 18 OC Backlight On/Off
19
RXD2T
I
Serial 2
(3.3 V logic level)
TXD2T
20
O
21 WIPER AI Touch screen wiper (optional 5-wire touch)
reserved
22
23
GND
P
ground
PE2
24
O
Power Enable #2 for external devices
25
CTS3
I
Serial 3
(EIA-232)
TXD3
26
O
27
RTS3
O
RXD3
28
I
29
USB+
IO
USB Client
USB-
30
IO
31
GND
P
ground
HP_IN
32
I
Headphone connected
33
USB_RECONN
O
USB Client power management 5
GND
34
P ground
36
35
STXD
O
MOSI
SPI signals
37
SRXD
I
MISO
39
SCLK2
O
SCLK
43
SFRM2
O
SS
VBATT_POS
38
PI
External battery
reserved
40
41
POWERENABLE
O
Power supply control
/PE1
42
O
Power Enable #1 for external devices
DCIN_POS
44
PI External power
48
45
/RQONOFF
I
"Request On/Off" Switch
GND
46
P ground
47
49
BATPOS
50
PI
Real-time clock backup battery
5The USB_RECONN output does not have series resistance or ESD protection.

Bitsy G5 User Manual
14 110121-4001A
3.3.4 J7 (J2): I2C and SD/MMC
Board Connector: 2x8 shrouded header, 2 mm, Samtec STMM-108-02-G-D-SM
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-108-02-F-D-450) 6
This header supplies the signals for the I2C bus and SD/MMC interface.
Pin
Name
Type
Description
1
I2C_SDA
IO
I2C bus
2
I2C_SCL
IO
3
GND
P
ground
4
P
5
SD_DAT2
IO
SD/MMC signals7
6
SD_DAT3
IO
7
SD_CMD
IO
8
SD_DAT0
IO
9
SD_CLK
O
10
/SD_CD
I
11
VDDX
PO
3.3 V
12
VCC
PO
5 V
13
/SD_WP
I
SD/MMC signals
14
/SDIO_IRQ
I
15
/SD_PWREN
O
16
SD_DAT1
IO
3.3.5 J9 (J4): Expansion Bus
Board Connector: 2x25 shrouded header, 2 mm, Samtec STMM-125-02-G-D
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-125-02-F-D-500)
These signals function as a 3.3 V digital expansion bus to expand the capabilities of the Bitsy G5.
Pin
Name
Pin
Type
Description
1
GND
P
ground
n/c
2
n/c
4
3
PCBD10
IO
Data8-10
5
PCBD9
IO
7
PCBD8
IO
PCBD2
6
IO
Data0-2
PCBD1
8
IO
PCBD0
10
IO
9
n/c
11
n/c
n/c
12
13
PCBA11
O
Address 11
15
VCC
PO
5 V
6Note that the STMM header is 0.050-inch higher than the other 2 mm headers on the board
because it is a surface-mount part. Use a correspondingly shorter socket on mating boards.
7Signal /SD_CD includes a 4.7kΩpull-up resistor.

Hardware Reference
110121-4001A 15
Pin
Name
Pin
Type
Description
17
/CARDBWAIT
I
Wait
19
CARDBRES
O
Reset
PCBA0
14
O
Address0-6
PCBA1
16
O
PCBA2
18
O
PCBA3
20
O
PCBA4
22
O
PCBA5
24
O
PCBA6
28
O
21
n/c
23
+3.3V
PO
+3.3 V
25
/CARDBON
O
5 V power control
n/c
26
27
/CF_INT
I
Interrupt
29
/CARDBMWR
O
Memory Write
31
n/c
33
/BEB1
O
IO Read
PCBA7
30
O
Address7-9
PCBA8
32
O
PCBA9
36
O
/CARDBMRD
34
O
Memory Read
35
n/c
37
CS_CF O Chip Select
38
39
PCBD15
IO
Data11-15
41
PCBD14
IO
43
PCBD13
IO
45
PCBD12
IO
47
PCBD11
IO
PCBD7
40
IO
Data3-7
PCBD6
42
IO
PCBD5
44
IO
PCBD4
46
IO
PCBD3
48
IO
49
n/c
/CARDBON_3P3V
50
O
3.3 V power control

Bitsy G5 User Manual
16 110121-4001A
3.3.6 J10 (J5): ADSmartIO, USB, Serial 1, Stereo Audio, I/Os
Board Connector: 2x25 shrouded header, 2 mm, Samtec STMM-125-02-G-D
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-125-02-F-D-500)
Pin
Name
Pin
Type
Description
1
/EXT_IRQ1
I
External Interrupt 1
3
/EXT_IRQ2
I
External Interrupt 2
5
EIO4
IO
General-purpose Digital I/Os
EIO3
2
IO
EIO2
4
IO
EIO1
6
IO
EIO0
8
IO
7
reserved
9
reserved
USB_PWR_
SENSE 10 I
Sense from external
USB Host power switch
USB_PWR_
CTRL
12 O
Control to external
USB Host power switch
USB_UDC-
14
IO
USB Host
USB_UDC+
16
IO
11
I2C_SCL
IO
PC6
I2C clock 8
13
reserved
15
reserved
SPKR_R-
18
AO
Stereo Speaker, right channel
SPKR_R+
20
AO
SPKR_L-
22
AO
Stereo Speaker, left channel
SPKR_L+
24
AO
17
ROW0
IO
PC0
ADSmartIO
19
ROW1
IO
PC1
21
ROW2
IO
PC2
23
ROW3
IO
PC3
25
ROW4
IO
PC4
27
COL0
IO
PA0
29
COL1
IO
PA1
31
COL2
IO
PA2
33
COL3
IO
PA3
RI1
26
I
Serial 1
(EIA-232)
DCD1
28
I
DSR1
30
I
DTR1
32
O
RXD1
34
I
TXD1
36
O
CTS1
38
I
RTS1
40
O
35
/EXT_IRQ3
I
External Interrupt 3
37
VDDX
PO
3.3 V
8Standard Bitsy G5 boards do not connect PC6 and PC7 of the ADSmartIO controller to the I2C
bus.

Hardware Reference
110121-4001A 17
Pin
Name
Pin
Type
Description
39
MIC_GND P Microphone ground
41
MIC_L
42
AI
Stereo Microphone
MIC_R
44
AI
43
reserved
45
/RESET_IN
I
External reset
47
VDDX
PO
3.3 V
VCC
46
PO 5 V
48
49
I2C_SDA
IO
PC7
I2C data 8
GND
50
P
Ground
3.3.7 J11 (J7): Supercapacitor Input
Supercapacitors are not supported by the Bitsy G5.This socket may not be populated on all
boards.
3.3.8 J16 (J1): JTAG/In-System Programming
Board Connector: 2x10 shrouded header, 2 mm, Samtec STMM-110-02-T-D
Recommended Board-to-Cable Connector: TCSD series
Recommended Board-to-Board Connector: ESQT series (e.g. ESQT-110-02-F-D-500)
This header is used during manufacturing for programming and debug, but is not otherwise
supported for application use. Production customers may use this header to reprogram boot code.
Pin
Name
Type
Description
1
/PM_RSTMCU
I
System reset
2
/TRST
I
JTAG
3
TMS
I
4
GND
P
5
TCLK
I
6
GND
P
7
TDI
I
8
GND
P
9
TDO
O
10
GND
P
11
RTCK
O
12
JTAG_VREF
PO
Reference voltage
13
PRG
I
ATMega/ADSmartIO
14
VDDX
PO
AVR Vref
15
MISO
O
ATMega/ADSmartIO
16
/DE
I
JTAG
17
MOSI
I
ATMega/ADSmartIO
18
GND
P
19
SCK
I
20
GND
P

Board Revision History
110121-4001A 18
4 Board Revision History
4.1 Identifying the board revision
The product revision number of the Bitsy G5 is etched on the underside of the printed circuit
board. That number is 170121-4000x, where "x" is the board revision.
4.2 Revision History
This section describes the differences between the revisions of the Bitsy G5.
4.2.1 Revision 2
Pre-production
If you are using a Bitsy G5 as a replacement for the BitsyXb, please note these differences from
revision A of the BitsyXb.
New Features
Freescale i.MX31 processor replaces XScale PXA270.
Freescale MC13783 Power Management and Audio Circuit:
•Replaces discrete microphone preamp circuitry and Crystal CS4202 AC’97 stereo codec.
•Replaces discrete switching regulator, linear voltage regulator, and step down converters
providing supply voltages for processor, memories, CPLD, and IO.
•Provides 4-wire analog touch panel capability.
•Replaces discrete RTC component.
DDR SDRAM replaces SDR SDRAM.
USB 2.0 Host port and USB 2.0 On-The-Go (OTG) port replaces USB 1.1 ports.
Changes
Pinout of JP2 swapped.
Voltage Setting
Jumper Setting
From
To
Vddx (3.3 V)
1-2
2-3
Vcc (5.0 V)
2-3
1-2
Connector reference designators labeled differently. In this manual, all Bitsy G5 reference
designators are shown as (Jx).
Input Power connector, J6, removed.
Vee Adapter connector, J8, removed.
Series resistor removed from USB_RECONN output, J3 (J9) pin 33.
Option to operate LCD panel buffers at either 3.3 V or 5 V removed. Supports LCD display data
at 3.3 V only.
Supercapacitor Input connector, J11 (J7), not supported.

Board Revision History
110121-4001A 19
SD/MMC not supported.
RTC interface changed from I2C bus to SPI.
Pull-up resistor value on I2C bus changed from 1.2kΩto 2.2kΩ.
Crystal frequencies changed. Removed 24.576 MHz, 32.768 kHz, and 13.000 MHz.
Added 19.2 MHz and 26.000 MHz.
USB OTG transceiver added to I2C bus at address 010 1101.
Signals on J1 (J8) changed as follows:
Pin
From
To
1
PNL_VEE
n/c
33
PNL_ENA
reserved
External CompactFlash not supported.
Connector J9 (J4) used for 3.3 V expansion bus only.
Signals on J9 (J4) changed as follows:
Pin
From
To
2
/CARDBDET2
n/c
4
/CARDB16
n/c
9
CARDBSTSCHG
n/c
11
CARDBSPK
n/c
12
PCBA0
n/c
13
/CARDBREG
PCBA11
14
PCBA1
PCBA0
16
PCBA2
PCBA1
18
PCBA3
PCBA2
20
PCBA4
PCBA3
21
/CARDBVS2
n/c
22
PCBA5
PCBA4
24
PCBA6
PCBA5
26
CARDBVCC
n/c
27
CARDBIRQ
/CF_INT
28
PCBA7
PCBA6
30
PCBA8
PCBA7
31
/CARDBIOWR
n/c
32
PCBA9
PCBA8
33
/CARDBIORD
/BEB1
35
/CARDB_VS1
n/c
36
PCBA10
PCBA9
37
/CARDBCE2
CS_CF
38
/CARDBCE1
CS_CF
49
/CARDBDET1
n/c

Bitsy G5 User Manual
20 110121-4001A
External temperature probe not supported.
Battery trickle charger not supported.
Signals on J3 (J9) changed as follows:
Pin
From
To
5
TEMP_SENSOR_MINUS
reserved
7
TEMP_SENSOR_PLUS
reserved
22
CHARGE
reserved
40
VBATT_NEG
reserved
External PS/2 keyboard not supported.
Signals on J10 (J5) changed as follows:
Pin
From
To
7
SIGPS2
reserved
9
CLKPS2
reserved
13
SMTIO1
reserved
15
SMTIO0
reserved
43
VREF
reserved
Connector J16 (J1) changed from 16-pin STMM-108-02-G-D-SM to 20-pin STMM-110-02-T-D.
Pinout changed as follows:
Name
From
To
/TRST
1
2
TMS
2
3
GND
3
4
TDI
4
7
TCLK
5
5
VDDX
6
14
GND
7
6
TDO
8
9
/FEW
9
FRDY
10
MISO
11
15
VCC
12
SCK
13
19
MOSI
14
17
PRG
15
13
GND
16
18
/PM_RSTMCU
1
GND
8
GND
10
RTCK
11
JTAG_VREF
12
/DE
16
GND
20