Advantech RISC Module SOM-A2552 User manual

User’s Manual for Advantech SOM-A2552 series module V1.00
User’s Manual
Of
Advantech RISC SOM-A2552 Series Module
System Module with Intel XScale PXA255 processor, SMI SM501
Graphic chip with Windows®CE.NET
Released Version:V1.00
Released Date: May. 19. 2004
Advantech Co., Ltd
Risc Embedded Computing Division
http://www.advantech.com/risc
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ABSTRACT
This manual describes the SOM-A2552 series module functions.
Copyright
This document is copyrighted, © 2003. All rights are reserved. The original manufacturer
reserves the right to make improvements to the products described in this document at any
time without notice.
No part of this document may be reproduced, copied, translated or transmitted in any
form or by any means without the prior written permission of the original manufacturer.
Information provided in this document is intended to be accurate and reliable. However, the
original manufacturer assumes no responsibility for its use, nor for any infringements upon the
rights of third parties that may result from such use.
Acknowledgements
IBM, PC/AT, PS/2 and VGA are trademarks of International Business Machines Corporation.
Intel® is trademark of Intel Corporation.
Microsoft® Windows® CE.NET is a registered trademark of Microsoft Corp.
All other product names or trademarks are properties of their respective owners.
For more information on this and other Advantech products please visit our
website at：
http://www.advantech.com
http://www.advantech.com/risc
For technical support and service for please visit our support website at：
http://eservice.advantech.com.tw/eservice/
Or directly mail to Advantech RISC platform application engineer：
[email protected]
Advantech RISC SOM design-in member can login-in the Advantech SOM
Design-in Zone for professional & real-time technical support & service：
http://risc-designin.advantech.com.tw
PS. The RISC design-in zone web portal is only for SOM design-in member
only.

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Revision History
Version Date Reason
V1.00 2004.05.19 1st Official released version. (For
9696255201, 9696255801, 9696255F01
& 9696255F12)

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Chapter 1 SOM-A2552series Architecture
1.1 Introduction
The SOM-A2552is WinCE ready, compact size module platform with
SBC-function-level functionality that is emphasis at high performance VGA
capability that offers Ultra low power consumption with SXGA LCD, Dual
Display, Analogy VGA in/out put, Audio Interface into a compact 68x68x6.8mm
size module.
By the integration of Intel PXA-255 32-bit SoC and SMI SM-501 VGA
controller, SOM-A2552 is perfect for Multimedia, mobility, battery powered,
great heavy display base embedded Internet appliance or so called smart
embedded devices.
SOM-A2552series Design highlight:
-WinCE.NET-ready platform as functional system engine
-SoC Intel XScale PXA255 & Companion Graphic Chip SMI SM501provide
complete SBC functionality & high performance Graphic function in a
module
-Pre-define I/O Ready bus thru SODIMM-200 interface
-Design-in package: Reference kit with full design-in documentation
-Advantech RISC WinCE builder offers friendly application migration
interface
-Low profit 68x68mm
SOM-A200 architecture
SOM-A255x series are based on Advantech SOM-A200 architecture to
design. SOM-A200 is Advantech RISC ultra-low power series SOM
architecture. The following block diagram is the SOM-A200 architecture.

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Based on SOM-A200 architecture to design, SOM-A255x series have two
kinds of PCB form factors.
lSOM-A2552 & SOM-A2558 series: 68mm x 68mm x 6.8mm
lSOM-A255Fseries: 68mm x 102mm x 6.8mm
SOM-A2552benefit
The SOM-A2552series are very compact (68mm x 68mm x 6.8mm) and
highly integrated system module. SOM-A2552series products have a
standardized form factor and standardized connectors (DDR-SODIMM
Memory Connector and two 100-pin board-to-board connectors) that carry a
specified set of signals. This standardization allows users to create
application-specified User Solution Board (CSB) which can accept a variety of
present and future SOM-A200 series modules.
SOM-A2552 series include popular & common peripheral functions such
as serial ports, USB, etc. The CSB designer can optimize exactly how each of
these functions is physically implemented. Connectors can be placed precisely
where they are needed for the application, on a baseboard designed to
optimally fit the system configuration and layout.
A CSB design may be used with a range of SOM-A2552 modules. This
flexibility can be used to differentiate products at various price/ performance
points, or to design “future proof” systems that have a built-in upgrade path.
The modularity of an SOM-A2552 solution also insures against obsolescence
as computer technology continues to evolve. A properly designed SOM-A2552
CSB can be used with several successive generations of SOM-A2552
modules. An SOM-A2552 CSB design thus has many of the advantages of a
custom computer board design, but delivers better obsolescence protection,
greatly reduced engineering effort, and faster time to market.
Based embedded platform integrates both low-level hardware and
software design and is always agreed to require heavy R&D resources, huge
development effort, risk as well as long time to market lead-time. Moreover,
the fast develop RISC SoC technology and short product life that has been
challenging System Integrators how to make a right product development
approach while foreseeing the huge advantage & benefit by adopting
RISC-base solution.
SOM-A2552 series are an innovate platform architecture of
WinCE.NET-ready complete functional system in a low profit module with
SODIMM 200-pin unified I/O ready bus interface that is designed to fit into
application-specified User Solution Board (CSB) with easy, risk-less, robust,
fast implementation approach. Dual expansion interface and Pre-select
Embedded OS also are well integrated on module. OS Board Support
Package (BSP) and advantech own-develop system utility & tools are also
supported for an easy design-in business philosophy.
SOM-A2552 series is designed for
lWireless broadband terminals: Wireless access to video/TV/DVD/PVR,
wireless access to broadband connection, digital picture viewer, remote
access to Internet/email, remote control of AV functions

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lSmart display devices: Kiosks, small DTV, thin client, high end mobile
consumer devices, videoconferencing
lMobile, battery-powered device platforms with large display demand
lVehicle computing/telemetric platforms for navigation/entertainment
demands
lMultimedia terminal device platforms with large display
lSecurity surveillance platforms with digital or analog video input/output
SOM-A2552 series design-in package
The Design-in Kit package provides developer complete reference
design-in suit for application evaluation/ development and own Customer
Solution Board (CSB) development. It contains the needed information,
documentation and tools for starting their hands-on work as the followings
items:
lTarget SOM (SOM-A2552-440B0): SOM-A2552 standard version
board.
SOM-A255x series Reference Carrier Board (RCB): Sample CSB
for developer reference. The board can be used in SOM-A255x
series board. (SOM-A255x means SOM-A2552, SOM-A2558 and
SOM-A2552)
l64MB compact flash card : the CF card is empty without any file
inside.
lSOM-A255x series support CD : includes
-sample image & boot loader
-manuals & datasheets
-SOM-A255x series CSB design guide
-S/W utility(upgrade utility, testing utility)
-SOM-A255x series WinCE 4.2 BSP & SDK
-Application note
lTesting Set:
It is designed for sample CSB or user own CSB/mass production test.
It includes:
-H/W testing tools: RS232 loop-back testing tool, ADAM-4520
for RS485 testing, null MODEM cable, JTAG cable, USB
ActiveSync cable, Audio cable, RS232 cable and RS485
cable.
-S/W testing Utility: Advantech-developed testing Utility. Testing
process will be implemented by S/W testing Utility and H/W
testing tools.
-Document: “User's manual of SOM-A255x series testing kit”.
User can base on the documents to know how to implement
testing process.
lSoftware Development Tools:
Software tools is the complete package for user developed their
target image to align with their target CSB and applications
-BSP: Binary Board Support Package of target SOM Design-in Kit.
User can integrate their target WinCE platform in components &
Apps & drivers
-SDK: For user target Apps development

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-Reference Image: Reference Image for the selected model of
SOM.
-Bootloader: Bootloader for the SOM-A255x series board.
-Upgrade Utility: User can use Upgrade utility to upgrade boot
logo, image & bootloader.
Except the Design-in package, Advantech also supply many types of LCD
kits for users to reduce their developing effort. The LCD kit include the
following items :
lLCD
lInverter
lCables: includes LCD signals cable, Inverter signals cable.
lDocument: The LCD kit installation guide.
Advantech supply the following LCD kits for user to choose
lLCD-A057-STQ1-0 (Optional item)
5.7” STN QVGA LCD kit. The kit includes 5.7” STN QVGA LCD
(NAN-YA/ LCBFBTB61M23), 4-wires resistive T/S, inverter, cables
and installation guide. SOM-A2552 & SOM-A255F series don’t
support 320*240 STN panel in this moment, if user have this kind of
requirement, please contact with [email protected] or
advantech regional sales for further support.
lLCD-A064-TTV1-0 (Optional item)
6.4” TFT VGA LCD kit. The kit includes 6.4” TFT VGA LCD
kit(PRIMEVIEW PD064VT2), 4-wires resistive T/S, inverter, cables
and installation guide. All SOM-A255x series support this LCD kit in
reference image.
lLCD-A104-TTS1-0(Optional item)
10.4” TFT SVGA LCD kit. The kit includes 10.4” TFT SVGA LCD
(AUO/ G104SN03v2), 4-wires resistive T/S, inverter, cables and
installation guide. Only SOM-A255F& SOM-A2552 series can
support this LCD-out mode.
lLCD-A150-TTX2-0 (Optional item)
15” TFT XGA LCD kit. The kit includes 15” TFT XGA LCD (AUO/
M150XN07), 4-wires resistive T/S, inverter, cables and installation
guide. Only SOM-A255F & SOM-A2552 series can support this
LCD-out mode.
SOM-A2552 series design-in kit(SOM-ADK2552-B00) is not included
any LCD kit. If user needs LCD kit to evaluate, please order your suitable
size LCD kit.
Risc CE-Builder
SOM-A255x series all support the Advantech optional RISC CE-Builder by
which developers can manage the BSP for their own platform development
thru a friendly users interface over the web.
RISC CE-Builder Solution is constituted by two parts: Web Image Builder
and CE-TUner.
Web Image Builder offers developers an online image building
mechanism through a friendly user interface to remotely conduct low-level

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software and platform customization / integration for their target application
without knowing / using Microsoft Platform Builder. The image building
machine links to Advantech’s Board Support Package (BSP) library so
developers can leverage Advantech’s low-level software solution database.
CE-TUner is a powerful value-added system utility / tool suit for
developers easily and simply develop, validate and upgrade their own SW
platform solution. CE-Tuner helps users fine-tune their target SW image for
optimized performance, verify settings, and platform tests before the
production image is certified.
RISC CE-Builder is not included in Design-in kit. If you need more
information about it, please contact with [email protected] or
advantech regional sales for further support.
1.12 SOM-A2552 Block diagram
SOM-A2552 series bases on Dual-Chips design concept, SoC Intel
XScale PXA255 & Graphic chip SMI SM501. The Block diagram is as
following:

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SoC Intel XScale PXA255 introduction
Intel XScale PXA255 processor is continuing the advance in handheld
multimedia functionality.
PXA255 is Low power, high performance 32-bit Intel XScale® core-based
CPU (200, 300 and 400 MHz). The SoC is ARM Architecture v.5TE compliant.
0.18µ process for high core speeds at low power.
Intel® Media Processing Technology including 40-bit accumulator and 16-bit
SIMD to enhance audio/video decode performance.
In power field, Low Power and Turbo modes enables enhanced optimal
battery life. 32 KB data and 32 KB instruction caches, 2 KB Mini data cache for
streaming data.
About PXA255 I/O expansion function, Integrated Memory and
PCMCIA/Compact Flash Controller with 100 MHz Memory Bus, 16-bit or 32-bit
ROM/Flash/SRAM (six banks), 16-bit or 32-bit SDRAM, SMROM (four banks),
as well as PCMCIA and Compact Flash for added functionality and
expandability. System Control Module includes 17 dedicated general-purpose
interruptible I/O ports, real-time clock, watchdog and interval timers, power
management controller, interrupt controller, reset controller, and two on-chip
oscillators.
Peripheral Control Module offers 16 channel configurable DMA controller,
integrated LCD controller with unique DMA for fast color screen support,
Bluetooth** I/F, serial ports including IrDA, I2C, I2S, AC97, three UARTs(1 Full
H/W flow control), SPI and enhanced SSP, USB end point interface, and
MMC/SD Card Support for expandable memory and I/O functionality.
About Intel PXA255 SoC detail information, user could visit Intel web site
for more.
Enhance Graphic Chip SMISM501 introduction
The SM501 is a Mobile System-on-a-Chip (MSOC™) device. This robust device
delivers high-performance video and 2D operation, providing a solution for embedded
mADKets. The SM501 also contains a wide variety of I/Os, such as analog RGB and
digital LCD Panel interfaces, an 8-bit parallel interface, USB, UART, IrDA, Zoom
Video, AC97 or I2S, SSP, PWM, and I2C interfaces. These built-in functionalities help
to reduce overall system cost. Additional programmable GPIO bits can be used to
interface to external devices as well.
About SMI SM501 display chip detail information, user could visit SMI web
site for more.
System Memory
SOM-A2552 SDRAM can be configured as 4/8/16/32/64/128/256MB.
Users can base on their requirement to reconfigure the SDRAM size.
There are two functions Flash on SOM-A2552 series. One is Boot Flash,
the other is Storage Flash.
Boot Flash is 1MB NOR flash. In standard SOM-A2552 series product,
Advantech will pre-install the WinCE bootloader in it.
Storage Flash is used to save image & user APs. Storage Flash size is
also reconfigurable. The Storage Flash is M-system Flash. Storage Flash size
could be 0/16/32/64 MB. SOM-A2552 series have Multiple boot options
through the on-board Flash or Compact Flash Card (CFC) for easy maintain
and cost saving. If Storage Flash is 0MB that means user should put the image
in Compact Flash Card.

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CPLD
SOM-A2552 series have one CPLD on board. The CPLD take charges of
the following function:
lSystem memory assignments
lI/O control
lRTC control
Base on Advantech policy, Advantech won’t release the CPLD code to
user. In fact, when user designs their own target carrier board, they don’t need
to know the CPLD code. Advantech will release memory map of available
memory block and available GPIOs. These are fully enough to users to
develop their own carrier board.
1.2 System Specifications
The following table is SOM-A2552 series functional specifications.
SOM-A2552 standard product specification table
Model Name
Func. SOM-A2552-440B0 Reconfiguration Option
CPU PXA255-400MHz 200/300/400 MHz
Graphic Chip SMI SM501 with 8MB embedded
SDRAM SM501 with /without 8MB embedded SDRAM
System Memory(SDRAM) 64MB 16/32/64/128 MB
Booting Flash 1MB NOR Flash -
On-board Flash (Image &
Storage ) 0MB 0/16/32/64MB
OS Image Storage WinCE.NET Linux(By customer request)
AMI Bus(X1 Bus) 100-pin B2B connector with driving
buffers Yes
Feature Extension
Bus(X2 Bus) 100-pin B2B connector (Provide ZV & SD/MMC I/F) Yes
Watch Dog PXA255 internal -
RTC External RTC w/backup power pin Yes
System Backup battery RTC/SDRAM -
Serial Port 3x Full RS-232 (TTL), 1x 2-wires
RS-232 (TTL),1x 3-wires
RS-232/RS-485 -
PCMCIA/Compact flash
I/F 2 slots PCMCIA/CF or 1xPCMCIA, 1xCF -
USB Host 1x USB 1.1 Host -
USB Client 1x USB Client -
SD/MMC Ix Ch(Support
Memory mode) -
CRT-out Up to 1280*1024 -
TV Interface TV out
ZV port Yes -
LCD TTL Interface SM501 24 bit LCD interface,
resolution up to 1280*1024 -
Touch Screen Interface 4-wire resistive Yes

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Audio Codec AC’97 codec on board, support
Microphone-in, Line-in, Line-out
Speaker-out Yes
Buzzer control Yes -
SM Bus Interface Yes -
System Reset H/W Reset, S/W Reset,
Suspend/Wake Up I/F -
Power input 3.3V/5V -
Operating temperature 0~60℃Optional for -10~60 &℃-20~80℃
Operating humidity 0%~90% relative humidity -
Certification FCC/CE -
Form factor 68mm*68mm*6.8mm -
Ps.. “Reconfiguration Option” column provide users many choices. “-“means
no option. If standard product SOM-A2552-440B0’s spec. doesn’t fit user’s
requirement, user could contact with Advantech for SOM-A2552
reconfiguration.
* Advantech SOM-A255x series have wide temperature products. About detail product
information, user could visit website http://www.advantech.com.tw/epc/phoenix/ . User also
could contact with [email protected] or advantech regional sales for further
information.
SOM-A2552-440B0 is off-the-shelf standard product. Advantech welcome
SOM-A2552 re-configuration demand. Users could base on the column of
SOM-A2552 spec. to re-configurate userized SOM-A2552. “Reconfiguration
Option” column provide users many choices. “-“means no option. If standard
product SOM-A2552-440B0’s spec. doesn’t fit user’s requirement, user could
contact with Advantech for SOM-A2552 reconfiguration.

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1.2.1 Mechanical Specification
Following figure shows the mechanical drawing of SOM-A2552 series.
The above figure shows the SOM-A2552 mechanical drawing. Users
could follow the above figure to implement the layout procedure.
1st drawing shows the SOM-A2552 module PCB mechanical data. When
users enter the layout procedure, user could follow the 1st drawing to place the
connector. SOM-A2552 series PCB form factor is 68mm*68mm*68mm.
The 2nd drawing shows the PCB thickness limitation. The component side
height is 2.8mm, and the solder side maximum height is 3.00mm and the PCB
thickness is 1.00mm.
The 3rd drawing shows allied mechanical data of SOM-A2552 series
board and CSB. Users could see that the matting height is 3.00mm and the
solder side maximum height of SOM-A2552 is also 3.00mm. So, Advantech
don’t suggest users to place any components between SOM module and
CSB in layout stage. It could be short!

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Most users will question the height of SOM structure product. Does
product be too thick based on SOM structure product? User could see the
answer in the 3rd mechanical drawing. Maximum height of SOM module allied
with CSB is 5.20mm. One port USB 1.1 host connector height is 8.37mm, 1
DB-9 RS-232 connector is 12.53mm, 1 type-II CF slot is 8.72mm. So, this is
the answer! If users want to use any standard I/O connector on CSB, then
SOM structure is not the maximum height maker. The maximum highness is
decided by I/O connector, not SOM structure.
1.2.2 Power System Requirement
SOM-A2552 Operating DC value table
Symbol Description Min. Typ. Max.
SYS_VCC3P
3SOM system DC 3.3V DC-in power source 33.3 3.6
SYS_VCC SOM system DC 5.0V DC-in
power source 4.5 5.5 5.5
BAT_VCC Back-up power source for RTC &
SDRAM -SYS_VC C3P3
Input DC Operating Conditions
VIH Input High Voltage, all standard
input and I/O pins 0.8*VCC VCC
VIL Input Low Voltage, all standard
input and I/O pins VSS 0.2*VCC
Output DC Operating Conditions
VOH Output High Voltage, all standard
output and I/O pins VCC-0.1 VCC
VOL Output Low Voltage, all standard
output and I/O pins VSS VSS+0.4
1.2.3 Power Consumption
In WinCE O.S. environment, SOM-A2552 series products have 3 kinds of
operating model :
lNormal mode: I/O and system all work well. All component on
SOM-A55x are powered.
lIdle mode: I/O and system all work well except backlight control
circuit. In order to do power-saving, LCD backlight control circuit
will disable the LCD backlight inverter.
lSuspend mode: all devices are no-powered except SDRAM,
RTC(real time clock) & some CPU(PXA255) power pins. In
suspend mode, SOM-A255x series are only powered by
BAT_VCC pin ( Li-ion 3.0V coin battery from CSB).If user doesn’t
design coin battery to power BAT_VCC pin, then Suspend mode
doesn’t work on SOM-A55x series products.
About detail power consumption of every SOM-A255x series, please
contact with [email protected].

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Chapter 2 Assignments and Descriptions
2.1 Connector Locations
Figure SOM-A2552 series component side
Figure SOM-A2552 series solder side
SOM Connector vendor table
Connector vendor PN
AMI bus (X1) Matsushita electric works,
LTD. AXK600335

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SOM-R200 (X2) Standard Golden finger
200-pin -
Feature extension bus
(X3) Matsushita electric works, LTD. AXK600335
JP1 PXA255 JTAG pin header -
JP2 SOM CPLD JTAG port -
PS.JP1 & JP2 are 2.00 mm 6*1 pin-headers.
CSB Mating Connector table
Connector vendor PN
AMI bus (X1) Matsushita electric works,
LTD. AXK500135
SODIMM-200 (X2) QUASAR SYSTEM INC. CA0075-200N31
Feature extension bus
(X3) Matsushita electric works, LTD. AXK500135
Advantech RISC SOM-A200 ultra low power series (SOM-A2552,
SOM-A2558 and SOM-A255F) all follow the same pin definition in X1,X2 and
X3. So, users could design their own CSB to be compatible with all advantech
RISC ultra low power series SOM easily. In this way, users’ CSB will be
powerful upgrade capability & option choice.
X1: AMI bus
AMI bus connector is PXA255 ARM bus. It includes complete system
address lines, data lines, GPIOs (for interrupt source) and Chip select pins
(nCS). Users could use this bus to extend any other IC controller on CSB to
implement the function which SOM modules not provide. In order to keep the
system bus signals well, every address lines and data lines are driven by
buffers. Buffers’ signals direction controls are implemented by CPLD.
X2: SODIMM-200 connector
Most I/O functions fog in X2. X2 includes PCMCIA/CF, T/S, Audio, system
reset control, SOM system power input pins, I2C, USB host, USB client,
RS-232 ports, RS-485 port, LCD out, CRT out and PS/2 ports. Every I/O
functions will be described in the following content in detail.
X3: Feature Extension connector
Advantech SOM-A series products use dual-chip or triple-chip design
concepts. The companion chip’s I/O function will come out through the X3. In
SOM-A255F series, SD/MMC & ZV (zoom video) I/F are included in X3.
ADVANTECH SOM-A200 is a powerful and helpful architecture for users
to implement a RISC system. There are three types of interfaces. One is
SO-DIMM 200 gold finger interface and two 100-pin B2B connectors.

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Pin Definition
¦JP1 PXA255 JTAG pin header
Pin Num. Description Note
1TCK
2TDI
3TDO
4TMS
5nJTAGTRST
6GND
7nRESET
Pin type
P : DC power pin or system ground pin
I : digital input pin
O : digital output pin
IO : bidirectional pin
AI : analog input pin
AO : analog output pin
-: no function
¦SODIMM-200 Pin Out Table (X2)
Pin
No.
Signals Typ
eDescription Default state
1SA_SKT_D0 AIO PCMCIA/CF data 0 No pulling
2SA_SKT_D8 IO PCMCIA/CF data 8 No pulling
3SA_SKT_D1 IO PCMCIA/CF data 1 No pulling
4SA_SKT_D9 IO PCMCIA/CF data 9 No pulling
5SA_SKT_D2 IO PCMCIA/CF data 2 No pulling
6SA_SKT_D10 IO PCMCIA/CF data 10 No pulling
7SA_SKT_D3 IO PCMCIA/CF data 3 No pulling
8SA_SKT_D11 IO PCMCIA/CF data 11 No pulling
9SA_SKT_D4 IO PCMCIA/CF data 4 No pulling
10 SA_SKT_D12 IO PCMCIA/CF data 12 No pulling
11 SA_SKT_D5 IO PCMCIA/CF data 5 No pulling
12 SA_SKT_D13 IO PCMCIA/CF data 13 No pulling
13 SA_SKT_D6 IO PCMCIA/CF data 6 No pulling
14 SA_SKT_D14 IO PCMCIA/CF data 14 No pulling
15 SA_SKT_D7 IO PCMCIA/CF data 7 No pulling
16 SA_SKT_D15 IO PCMCIA/CF data 15 No pulling
17 SA_SKT_A14 IO PCMCIA/CF address 14 No pulling
18 SA_SKT_A15 IO PCMCIA/CF address 15 No pulling
19 SA_SKT_A12 IO PCMCIA/CF address 12 No pulling
20 SA_SKT_A13 IO PCMCIA/CF address 13 No pulling
21 SA_SKT_A10 IO PCMCIA/CF address 10 No pulling
22 SA_SKT_A11 IO PCMCIA/CF address 11 No pulling
23 SA_SKT_A8 IO PCMCIA/CF address 8 No pulling

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24 SA_SKT_A9 IO PCMCIA/CF address 9 No pulling
25 SA_SKT_A6 IO PCMCIA/CF address 6 No pulling
26 SA_SKT_A7 IO PCMCIA/CF address 7 No pulling
27 SA_SKT_A4 IO PCMCIA/CF address 4 No pulling
28 SA_SKT_A5 IO PCMCIA/CF address 5 No pulling
29 SA_SKT_A2 IO PCMCIA/CF address 2 No pulling
30 SA_SKT_A3 IO PCMCIA/CF address 3 No pulling
31 SA_SKT_A0 IO PCMCIA/CF address 0 No pulling
32 SA_SKT_A1 IO PCMCIA/CF address 1 No pulling
33 SA_SKT_A16 IO PCMCIA/CF address 16 No pulling
34 SA_SKT_A17 IO PCMCIA/CF address 17 No pulling
35 SA_SKT_A18 IO PCMCIA/CF address 18 No pulling
36 SA_SKT_A19 IO PCMCIA/CF address 19 No pulling
37 SA_SKT_A20 IO PCMCIA/CF address 20 No pulling
38 SA_SKT_A21 IO PCMCIA/CF address 21 No pulling
39 SA_SKT_A22 IO PCMCIA/CF address 22 No pulling
40 nSA_SKT_IOR O PCMCIA I/O read. Performs read
transactions from PCMCIA I/O
space.
No pulling
41 SA_SKT_A24 IO PCMCIA/CF address 24 No pulling
42 XP AI 4-wires resistive touch screen
signals: X+ Position Input. No pulling
43 nSA_SKT_WE O PCMCIA write enable. (output)
Performs writes to PCMCIA
memory and to PCMCIA attribute
space. Also used as the write
enable signal for Variable Latency
I/O.
No pulling
44 YP AI 4-wires resistive touch screen
signals: Y+ Position Input. No pulling
45 nSA_SKT_IOW O PCMCIA I/O write signal. (output)
Performs write transactions to
PCMCIA I/O space.
No pulling
46 XN AI 4-wires resistive touch screen
signals: X–Position Input No pulling
47 nSA_SKT_RE
GO
PCMCIA Register select. (output)
Indicates that the target address
on a memory transaction is
attribute space. Has the same
timing as the address bus.
No pulling
48 YN AI 4-wires resistive touch screen
signals: Y–Position Input No pulling
49 SA_SKT_A23 IO PCMCIA/CF address 23 No pulling
50 GND PGround -
51 SA_SKT_A25 IO PCMCIA/CF address 25 No pulling
52 AC97_EAPD O External audio Amplifier power
down control No pulling
53 nSA_SKT_OE O PCMCIA output enable. (output)
Reads from PCMCIA memory and No pulling

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to PCMCIA attribute space.
54 LINEOUT_R AO Audio line-Out right channel -
55 nSA_SKT1_CD
1IPCMCIA/CF slot 0 card detect pin
No pulling
56 LINEOUT_L AO Audio line-Out left channel -
57 nSA_SKT0_CD
1IPCMCIA/CF slot 1 card detect pin 1. No pulling
58 AC97_LINEIN_
RAI
Audio line input right channel. -
59 nSA_SKT1_CE
1O
PCMCIA/CF slot 0 card enable pin
1. No pulling
60 AC97_LINEIN_
LAI
Audio line input left channel. -
61 nSA_SKT0_CE
1O
PCMCIA/CF slot 0 card enable pin
1. No pulling
62 MIC_IN AI First Microphone input -
63 nSA_SKT1_CE
2O
PCMCIA/CF slot 1 card enable pin
2. No pulling
64 GND PGround -
65 SA_SKT1_VCC PPCMCIA/CF slot 1 power pin -
66 nSA_SKT0_VS
1IPCMCIA/CF slot 0 voltage sense pin 1.
Pull high with
10Kohm
67 nSA_SKT1_VS
1IPCMCIA/CF slot 1 voltage sense pin 1.
Pull high with
10Kohm
68 nSA_SKT0_CE
2O
PCMCIA/CF slot 0 card enable pin
2. No pulling
69 SA_SKT1_RDY IPCMCIA/CF slot 1 ready pin.
Pull high with
10Kohm
70 SA_SKT0_RDY IPCMCIA/CF slot 0 ready pin.
Pull high with
10Kohm
71 nSA_SKT0_VS
2IPCMCIA/CF slot 0 voltage sense pin 2.
Pull high with
10Kohm
72 nSA_SKT1_VS
2IPCMCIA/CF slot 1 voltage sense pin 2.
Pull high with
10Kohm
73 SA_SKT0_RST O PCMCIA/CF slot 0 reset pin.
Pull high with
10Kohm
74 SA_SKT1_RST O PCMCIA/CF slot 1 reset pin.
Pull high with
10Kohm
75 nSA_SKT0_W
AIT I
PCMCIA/CF slot 0 wait signals.
Driven low by the PCMCIA card to
extend the
length of the transfers
to/from the PXA255 processor.
Pull high with
10Kohm
76 nSA_SKT1_CD
2I
PCMCIA/CF slot 1 card detect pin
2. No pulling
77 nSA_SKT1_W
AIT IPCMCIA/CF slot 1 wait signals. Driven low by the PCMCIA card to
extend the length of the transfers
to/from the PXA255 processor.
Pull high with
10Kohm
78 nSA_SKT0_CD I
PCMCIA/CF slot 0 card detect pin
No pulling

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22.
79 nSA_SKT0_IOI
S16 IIO Select 16. (input) Acknowledge from the PCMCIA card that the
current address is a valid 16 bit
wide I/O address.
Pull high with
10Kohm
80 SA_SKT0_VCC PPCMCIA/CF slot 0 power pin. Powered
81 nSA_SKT1_IOI
S16 IPCMCIA/CF slot 0 IO Select 16. Acknowledge from the PCMCIA
card that the current address is a
valid 16 bit wide I/O address.
Pull high with
10Kohm
82 nSA_PWR_ON I
System suspend/wakeup input pin.
Falling edge triggered.
Pull high with
10Kohm
83 nBATT_FALT IMain Battery Fault. Signals that
main battery is low or removed.
Assertion causes PXA255
processor to enter sleep mode or
force an Imprecise Data Exc
eption,
which cannot be masked. PXA255
processor will not recognize a
wakeup event while this signal is
asserted. Minimum assertion time
for nBATT_FAULT is 1 ms.
Pull high with
100Kohm
84 nSW_RESET ISystem software reset input pin.
Falling edge triggered.
Pull high with
10Kohm
85 nVDD_FALT IVDD Fault. Signals that the main
power source is going out of
regulation. nVDD_FAULT causes
the PXA255 processor to enter
sleep mode or force an Imprecise
Data Exception, which cannot be
masked. nVDD_FAULT is ignored
after a wakeup event until the
power supply timer completes
(approximately 10 ms). Minimum
assertion time for nVDD_FAULT is
1 ms.
Pull high with
100Kohm
86 nRESET_OUT O Reset Out. Asserted when
nRESET is asserted and deasserts
after nRESET is deasserted but
before the first instruction fetch.
nRESET_OUT is also asserted for
“soft” reset events: sleep,
watchdog reset, or GPIO reset.
No pulling
87 GND PGround -
88 PWR_EN
O
Power Enable for the power
supply. (output) When negated, it
signals the power supply to
remove power to the core because
the system is entering sleep mode.
Pull high with
100Kohm
89 BAT_VCC P3.0V li-
ion coin battery positive
No pulling

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pole input pin.
90 nRESET ISystem hardware reset input pin.
Falling edge triggered. Hard reset.
(input) Level sensitive input used
to start the processor from a known
address. Assertion causes the
current instruction to terminate
abnormally and causes a reset.
When nRESET is driven high, the
processor starts execution from
address 0. nRESET must remain
low until the power supply is stable
and the internal 3.6864 MHz
oscillator has stabilized.
Pull high with
10Kohm
91 nDC_IN ISystem DC input indicator pin.
When the pin is low, it means
system is powered by external DC
power source. If user target dev
ice
is not power by battery, use could
use this pin as GPIO. The pin
connects to SoC PXA255 GPIO16.
Pull low with
1Kohm
92 SYS_VCC PSOM system DC power 5V input
pin. SYS_VCC should always be
powered by DC 5V even in sleep
mode.
-
93 SYS_VCC3P3 PSOM system DC power 3.3V input
pin. SYS_VCC should always be
powered by DC 3.3V even in sleep
mode.
-
94 SYS_VCC PSOM system DC power 5V input
pin. SYS_VCC should always be
powered by DC 5V even in sleep
mode.
-
95 SYS_VCC3P3 PSOM system DC power 3.3V input
pin. SYS_VCC should always be
powered by DC 3.3V even in sleep
mode.
-
96 SMBUS_CLK IO
System Management Bus clock
pin. The pin is implemented by
SoC PXA255 I2C bus.
Pull high with
4.7Kohm
97 SYS_VCC3P3 PSOM system DC power 3.3V input
pin. SYS_VCC should always be
powered by DC 3.3V even in sleep
mode.
-
98 SMBUS_DAT IO
System Management Bus data pin.
The pin is implemented by SoC
PXA255 I2C bus.
Pull high with
4.7Kohm
99 SYS_VCC3P3 PSOM system DC power 3.3V input
pin. SYS_VCC should always be
powered
by DC 3.3V even in sleep
-