Advantech SOM-A2552 User Manual

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User’s Manual for Advantech SOM-A2552 series module V1.00

Advantech RISC SOM-A2552 Series Module

User’s Manual

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.

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.

User’s Manual for Advantech SOM-A2552 series module V1.00

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：

AE.RISC@advantech.com.tw

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

V1.00 2004.05.19 1st Official released version. (For

User’s Manual for Advantech SOM-A2552 series module V1.00

Date Reason

9696255201, 9696255801, 9696255F01

& 9696255F12)

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User’s Manual for Advantech SOM-A2552 series module V1.00

Chapter 1 SOM-A2552 series Architecture

1.1 Introduction

The SOM-A2552 is 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-A2552 series 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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User’s Manual for Advantech SOM-A2552 series module V1.00

Based on SOM-A200 architecture to design, SOM-A255x series have two

kinds of PCB form factors.

l SOM-A2552 & SOM-A2558 series: 68mm x 68mm x 6.8mm l SOM-A255F series: 68mm x 102mm x 6.8mm

SOM-A2552 benefit

The SOM-A2552 series are very compact (68mm x 68mm x 6.8mm) and

highly integrated system module. SOM-A2552 series 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 l Wireless 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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User’s Manual for Advantech SOM-A2552 series module V1.00

l Smart display devices: Kiosks, small DTV, thin client, high end mobile

consumer devices, videoconferencing

l Mobile, battery-powered device platforms with large display demand l Vehicle computing/telemetric platforms for navigation/entertainment

demands

l Multimedia terminal device platforms with large display l Security 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:

l Target 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)

l 64MB compact flash card : the CF card is empty without any file

inside.

l SOM-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

l Testing 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.

l Software 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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User’s Manual for Advantech SOM-A2552 series module V1.00

- 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 :

l LCD l Inverter l Cables: includes LCD signals cable, Inverter signals cable. l Document: The LCD kit installation guide.

Advantech supply the following LCD kits for user to choose

l LCD-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 ae.risc@advanch.com.tw or advantech regional sales for further support. l LCD-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. l LCD-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. l LCD-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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User’s Manual for Advantech SOM-A2552 series module V1.00

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 ae.risc@advanch.com.tw 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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User’s Manual for Advantech SOM-A2552 series module V1.00

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 SMI SM501 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:

l System memory assignments

l I/O control

l RTC 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.

CPU PXA255-400MHz 200/300/400 MHz Graphic Chip System Memory(SDRAM)

Booting Flash 1MB NOR Flash On-board Flash (Image &

Storage ) OS Image Storage WinCE.NET Linux(By customer request)

AMI Bus(X1 Bus) Feature Extension

Bus(X2 Bus) Watch Dog PXA255 internal -

RTC External RTC w/backup power pin System Backup battery

Serial Port

PCMCIA/Compact flash I/F

USB Host 1x USB 1.1 Host USB Client 1x USB Client -

SD/MMC CRT-out Up to 1280*1024 -

TV Interface TV out ZV port Yes -

LCD TTL Interface Touch Screen Interface 4-wire resistive Yes

100-pin B2B connector with driving

100-pin B2B connector (Provide ZV

SOM-A2552-440B0 Reconfiguration Option

SMI SM501 with 8MB embedded

SDRAM

64MB 16/32/64/128 MB

0MB 0/16/32/64MB

buffers

& SD/MMC I/F)

RTC/SDRAM -

3x Full RS-232 (TTL), 1x 2-wires

RS-232 (TTL),1x 3-wires

RS-232/RS-485

2 slots PCMCIA/CF or

1xPCMCIA, 1xCF

Ix Ch(Support

Memory mode)

SM501 24 bit LCD interface,

resolution up to 1280*1024

SM501 with /without 8MB

embedded SDRAM

Yes Yes

Yes

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User’s Manual for Advantech SOM-A2552 series module V1.00

AC’97 codec on board, support

Audio Codec

Buzzer control Yes SM Bus Interface Yes -

System Reset 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 ae.risc@advanch.com.tw or advantech regional sales for further information.

Microphone-in, Line-in, Line-out

Speaker-out

H/W Reset, S/W Reset,

Suspend/Wake Up I/F

Yes

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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User’s Manual for Advantech SOM-A2552 series module V1.00

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.

SYS_VCC3P3 SOM system DC 3.3V DC-in

power source 3 3.3 3.6

SYS_VCC BAT_VCC

SOM system DC 5.0V DC-in power source 4.5 5.5 5.5 Back-up power source for RTC & SDRAM -

Input DC Operating Conditions

VIH

VIL

Input High Voltage, all standard input and I/O pins Input Low Voltage, all standard input and I/O pins VSS

0.8*VCC

Output DC Operating Conditions

VOH

VOL

Output High Voltage, all standard output and I/O pins VCC-0.1 Output Low Voltage, all standard output and I/O pins VSS

Max.

SYS_VC

C3P3

VCC

0.2*VCC

VCC

VSS+0.4

1.2.3 Power Consumption

In WinCE O.S. environment, SOM-A2552 series products have 3 kinds of operating model :

l Normal mode: I/O and system all work well. All component on

SOM-A55x are powered.

l Idle 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.

l Suspend 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 ae.risc@advantech.com.tw.

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User’s Manual for Advantech SOM-A2552 series module V1.00

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)

JP1 PXA255 JTAG pin header

Matsushita electric works,

LTD.

AXK600335

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,

AXK500135

LTD.

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

1 TCK 2 TDI 3 TDO 4 TMS 5 nJTAGTRST 6 GND 7 nRESET

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.

1 SA_SKT_D0 AIO PCMCIA/CF data 0 No pulling 2 SA_SKT_D8 IO PCMCIA/CF data 8 No pulling 3 SA_SKT_D1 IO PCMCIA/CF data 1 No pulling 4 SA_SKT_D9 IO PCMCIA/CF data 9 No pulling 5 SA_SKT_D2 IO PCMCIA/CF data 2 No pulling 6 SA_SKT_D10 IO PCMCIA/CF data 10 No pulling 7 SA_SKT_D3 IO PCMCIA/CF data 3 No pulling 8 SA_SKT_D11 IO PCMCIA/CF data 11 No pulling 9 SA_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

Signals Typ

Description Default state

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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

No pulling transactions from PCMCIA I/O space.

41 SA_SKT_A24 IO PCMCIA/CF address 24 No pulling 42 XP AI 4-wires resistive touch screen

No pulling signals: X+ Position Input.

43 nSA_SKT_WE O PCMCIA write enable. (output)

No pulling Performs writes to PCMCIA memory and to PCMCIA attribute space. Also used as the write enable signal for Variable Latency I/O.

44 YP AI 4-wires resistive touch screen

No pulling signals: Y+ Position Input.

45 nSA_SKT_IOW O PCMCIA I/O write signal. (output)

No pulling Performs write transactions to PCMCIA I/O space.

46 XN AI 4-wires resistive touch screen

No pulling signals: X– Position Input

47 nSA_SKT_REG O PCMCIA Register select. (output)

No pulling Indicates that the target address on a memory transaction is attribute space. Has the same timing as the address bus.

48 YN AI 4-wires resistive touch screen

No pulling signals: Y– Position Input

49 SA_SKT_A23 IO PCMCIA/CF address 23 No pulling 50 GND P Ground - 51 SA_SKT_A25 IO PCMCIA/CF address 25 No pulling 52 AC97_EAPD O External audio Amplifier power

No pulling down control

53 nSA_SKT_OE O PCMCIA output enable. (output)

No pulling Reads from PCMCIA memory and

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PCMCIA/CF slot 0 card enable pin

PCMCIA/CF slot 1 card enable pin

Pull high with

PCMCIA/CF slot 0 card enable pin

Pull high with

PCMCIA/CF slot 0 wait signals.

Driven low by the PCMCIA card to

length of the transfers

Pull high with

PCMCIA/CF slot 1 card detect pin

Pull high with

PCMCIA/CF slot 0 card detect pin

to PCMCIA attribute space.

54 LINEOUT_R AO Audio line-Out right channel 55 nSA_SKT1_CD1 I PCMCIA/CF slot 0 card detect pin No pulling

56 LINEOUT_L AO Audio line-Out left channel 57 nSA_SKT0_CD1 I PCMCIA/CF slot 1 card detect pin

No pulling

58 AC97_LINEIN_R AI Audio line input right channel. 59 nSA_SKT1_CE1 O

60 AC97_LINEIN_L AI Audio line input left channel. 61 nSA_SKT0_CE1 O

62 MIC_IN AI First Microphone input 63 nSA_SKT1_CE2 O

64 GND P Ground - 65 SA_SKT1_VCC P PCMCIA/CF slot 1 power pin 66 nSA_SKT0_VS1 I PCMCIA/CF slot 0 voltage sense

pin 1.

67 nSA_SKT1_VS1 I PCMCIA/CF slot 1 voltage sense

pin 1.

68 nSA_SKT0_CE2 O

69 SA_SKT1_RDY I PCMCIA/CF slot 1 ready pin.

70 SA_SKT0_RDY I PCMCIA/CF slot 0 ready pin. 71 nSA_SKT0_VS2 I PCMCIA/CF slot 0 voltage sense

pin 2.

72 nSA_SKT1_VS2 I PCMCIA/CF slot 1 voltage sense

pin 2.

73 SA_SKT0_RST O PCMCIA/CF slot 0 reset pin. 74 SA_SKT1_RST O PCMCIA/CF slot 1 reset pin. 75 nSA_SKT0_W

AIT

extend the to/from the PXA255 processor.

76 nSA_SKT1_CD2 I

77 nSA_SKT1_W

AIT

I PCMCIA/CF slot 1 wait signals.

Driven low by the PCMCIA card to extend the length of the transfers to/from the PXA255 processor.

78 nSA_SKT0_CD I

No pulling

10Kohm

No pulling

10Kohm

No pulling

10Kohm

No pulling

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User’s Manual for Advantech SOM-A2552 series module V1.00

Pull high with

System suspend/wakeup input pin.

Pull high with

eption,

Pull high with

assertion time for nVDD_FAULT is

Pull high with

nRESET is asserted and deasserts

remove power to the core because

Pull high with

ion coin battery positive

2 2.

79 nSA_SKT0_IOI

S16

I IO Select 16. (input) Acknowledge

from the PCMCIA card that the

10Kohm current address is a valid 16 bit wide I/O address.

80 SA_SKT0_VCC P PCMCIA/CF slot 0 power pin. Powered 81 nSA_SKT1_IOI

S16

I PCMCIA/CF slot 0 IO Select 16.

Acknowledge from the PCMCIA

10Kohm card that the current address is a valid 16 bit wide I/O address.

82 nSA_PWR_ON I

Falling edge triggered.

10Kohm

83 nBATT_FALT I Main Battery Fault. Signals that

main battery is low or removed.

100Kohm Assertion causes PXA255 processor to enter sleep mode or force an Imprecise Data Exc 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.

84 nSW_RESET I System software reset input pin.

Falling edge triggered.

10Kohm

85 nVDD_FALT I VDD Fault. Signals that the main

power source is going out of

100Kohm 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

86 nRESET_OUT O Reset Out. Asserted when

87 GND P Ground - 88 PWR_EN

89 BAT_VCC P 3.0V li-

1 ms.

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.

Power Enable for the power

supply. (output) When negated, it signals the power supply to

the system is entering sleep mode.

No pulling

100Kohm

No pulling

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User’s Manual for Advantech SOM-A2552 series module V1.00

to start the processor from a known

low until the power supply is stable

Pull high with

ice

System Management Bus clock

pin. The pin is implemented by

Pull high with

System Management Bus data pin.

Pull high with

by DC 3.3V even in sleep

pole input pin.

90 nRESET I System hardware reset input pin.

Falling edge triggered. Hard reset. (input) Level sensitive input used

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

and the internal 3.6864 MHz oscillator has stabilized.

91 nDC_IN I System DC input indicator pin.

When the pin is low, it means system is powered by external DC power source. If user target dev is not power by battery, use could use this pin as GPIO. The pin connects to SoC PXA255 GPIO16.

92 SYS_VCC P SOM system DC power 5V input

pin. SYS_VCC should always be powered by DC 5V even in sleep mode.

93 SYS_VCC3P3 P SOM system DC power 3.3V input

pin. SYS_VCC should always be

10Kohm

Pull low with

1Kohm

mode.

94 SYS_VCC P SOM system DC power 5V input

pin. SYS_VCC should always be powered by DC 5V even in sleep mode.

95 SYS_VCC3P3 P SOM system DC power 3.3V input

pin. SYS_VCC should always be mode.

96 SMBUS_CLK IO

SoC PXA255 I2C bus.

97 SYS_VCC3P3 P SOM system DC power 3.3V input

pin. SYS_VCC should always be mode.

98 SMBUS_DAT IO

The pin is implemented by SoC PXA255 I2C bus.

99 SYS_VCC3P3 P SOM system DC power 3.3V input

pin. SYS_VCC should always be powered

4.7Kohm

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User’s Manual for Advantech SOM-A2552 series module V1.00

ient link status indicator pin.

function, user could use this pin as

Pull high with

doesn’t need UART2 function, user

Pull high with

doesn’t need UART3 function, user

Pull high with

doesn’t need UART2 function, user

Pull high with

mode.

100

USB_CP IO USB Client Positive pin No pulling

101 SYS_VCC3P3 P SOM system DC power 3.3V input

pin. SYS_VCC should always be mode.

102

USB_CN IO USB Client Negative pin. No pulling

103 SYS_VCC3P3 P SOM system DC power 3.3V input

pin. SYS_VCC should always be mode.

104 BUZZER_OUT O Buzzer-out control signals. User

can use the pin to control buzzer power pin.

105 USB_LINK_5V I USB cl

When the pin is high, it means USB client port has been plugged-in USB device.

106 UART2_RTS O UART2 Request-to-Send signal

pin. If user doesn’t need UART2

Powered

No pulling

Pull low with

100Kohm

100Kohm GPIO. The pin connects to SoC

PXA255 GPIO45.

107

GND P Ground -

108 UART2_DCD I UART2 data-Carrier-Detect signal

pin.

109 UART3_DCD I UART3 data-Carrier-Detect signal

pin.

110 UART2_DSR I UART2 Data-Set-Ready signal pin. 111 UART3_DSR I UART3 Data-Set-Ready signal pin. 112 UART2_TXD O UART2 Transmit signal pin. If user

could use this pin as GPIO. The pin connects to SoC PXA255 GPIO43.

113 UART3_RXD I UART3 Receive signal pin. If user

could use this pin as GPIO. The pin connects to SoC PXA255 GPIO46.

114 UART2_RXD I UART2 Receive signal pin. If user

could use this pin as GPIO. The pin connects to SoC PXA255 GPIO42.

115 UART3_RTS O UART3 Request-to-Send signal

pin.

100Kohm

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User’s Manual for Advantech SOM-A2552 series module V1.00

al pin. If

user doesn’t need UART2 function,

Pull high with

UART3 Transmit signal pin. If user

doesn’t need UART3 function, user

pin connects to SoC PXA255

Pull high with

Ready signal

Pull high with

logic power MOS switch to achieve

116 UART2_CTS I UART2 Clear-to-Send sign

user could use this pin as GPIO. The pin connects to SoC PXA255 GPIO44.

117 UART3_TXD O

could use this pin as GPIO. Th GPIO47.

118 UART2_DTR O UART Data-Terminal-

pin.

119 UART3_CTS I UART3 Clear-to-Send signal pin.

120

UART2_RI I UART2 Ring Indicator signal pin.

121 UART3_DTR O UART3 Data-Terminal-Ready

signal pin.

122

UART3_RI I UART3 Ring Indicator signal pin.

123 UART1_DSR I UART1 Data-Set-Ready signal pin. 124 UART1_DCD I UART1 Data-Carrier-Detect signal

pin.

125 UART1_CTS I UART1 Clear-to-Send signal pin. 126 UART1_RXD I UART1 Receive signal pin.

127 UART1_RTS O UART1 Request-to-Send signal

pin.

128 UART1_TXD O UART1 Transmit signal pin. 129 UART1_DTR O UART1 Data-Terminal-Ready

signal pin.

130 131

132 133 134 135 136 137

GND P Ground -

UART1_RI I UART Ring Indicator signal pin.

N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. -

GND P Ground -

VDD_ENA O LCD power control signal. User

can use this pin to control the LCD

100Kohm

No pulling

138 139

VEE_ENA O STN LCD VEE power control

power-saving.

N.C. - N.C. just float this pin. -

No pulling signal. User can use this pin to

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User’s Manual for Advantech SOM-A2552 series module V1.00

control STN LCD VEE power MOS

Pull high with

Ready

Pull high with

brightness control signals.

ncrease

or decrease Wiper Control.

Advantech suggests to connect the

One of LCD inverter backlight

ess control signals.

Up/Down

Control. Advantech suggests to

One of LCD inverter backlight

brightness control signals.

is used be chip select

. Advantech suggests to

One of STN LCD contrast control

is used be

switch to achieve power-saving.

140 141

N.C. - N.C. just float this pin. -

VBK_ENA O LCD back light inverter power

control signal. User can use this pin to control the LCD backlight inverter to achieve power-saving.

142 143 144 145 146 147

USB_N1 IO USB host port1 D- data line. No pulling

N.C. - N.C. just float this pin. -

USB_P1 IO USB host port1 D+ data line. No pulling

N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. -

148 UART5_RXD I UART5 Receive signal pin.

149 UART4_RXD I UART5 Receive signal pin. 150 UART5_RTS O UART5 Data-Terminal-

signal pin.

151 UART4_TXD O UART4 Transmit signal pin. 152 UART5_TXD O UART5 Transmit signal pin. 153

154 155 156

N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. -

157 nVBRIR_INC O One of LCD inverter backlight

No pulling

100Kohm

No pulling

158

CRT_R AO The red CRT output. No pulling

159 nVBRIR_UnD O

160 161

162

CRT_G AO The Green CRT output. No pulling

VBRIR_CS O

CRT_B AO The blue CRT output. No pulling

163 nVCONR_INC O

nVBRIR_INC is used to i

pin to DS1804 1st pin.

No pulling brightn nVBRIR_UnD is used be

connect the pin to DS1804 2nd pin.

No pulling VBRIR_CS

pin connect the pin to DS1804 7th pin.

No pulling signals. nVCONR_INC increase/decrease Wiper Control

Your ePlatform Partner

User’s Manual for Advantech SOM-A2552 series module V1.00

. Advantech suggests to

One of STN LCD contrast control

is used be

. Advantech

the pin to

One of STN LCD contrast control

VCONR_UnD is used be

Up/Down Control. Advantech

suggests to connect the pin to

Reserved for future use. User can

connect the pin to CRT I2C data

Pull high with

Reserved for future use. User can

connect the pin to CRT I2C clock

Pull high with

pin connect the pin to DS1804 1st pin.

164 CRT_HSYNC AO Horizontal sync for the CRT. No pulling 165 VCONR_CS O

No pulling signals. VCONR_CS chip select pin suggests to connect DS1804 7th pin.

166 CRT_VSYNC AO Vertical sync for the CRT. No pulling 167 VCONR_UnD O

No pulling signals.

DS1804 2nd pin.

168

CRT_SDA -

4.71Kohm

pin or just float it.

169

CRT_CLK -

4.71Kohm

pin or just float it.

170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 FLM_VSYNC O Flat Panel TFT Vertical Sync/STN

B0 O B0 in 24-bit TFT mode. No pulling B1 O B in 24-bit TFT mode. No pulling B2 O B in 24-bit TFT mode. No pulling B3 O B in 24-bit TFT mode. No pulling B4 O B in 24-bit TFT mode. No pulling B5 O B in 24-bit TFT mode. No pulling B6 O B in 24-bit TFT mode. No pulling B7 O B in 24-bit TFT mode. No pulling G0 O G in 24-bit TFT mode. No pulling G1 O G in 24-bit TFT mode. No pulling G2 O G in 24-bit TFT mode. No pulling G3 O G in 24-bit TFT mode. No pulling G4 O G in 24-bit TFT mode. No pulling G5 O G in 24-bit TFT mode. No pulling G6 O G in 24-bit TFT mode. No pulling G7 O G in 24-bit TFT mode. No pulling R0 O R in 24-bit TFT mode. No pulling R1 O R in 24-bit TFT mode. No pulling R2 O R in 24-bit TFT mode. No pulling R3 O R in 24-bit TFT mode. No pulling R4 O R in 24-bit TFT mode. No pulling R5 O R in 24-bit TFT mode. No pulling R6 O R in 24-bit TFT mode. No pulling

R7 O R in 24-bit TFT mode. No pulling N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. -

No pulling Frame Pulse. For TFT displays, this output connects to the Vertical

Your ePlatform Partner

User’s Manual for Advantech SOM-A2552 series module V1.00

his output connects

STN displays, this output connects

Flat Panel Display Enable. This

signal is used as a data enable

when the pixel clock needs to latch

connects to the TXCLK input of the

Chip selects to

static memory devices such as ROM

and Flash. Individually

programmable in the memory

configuration registers. This pin can

atency I/O

devices. nBUF_CS2 directly connect

to SoC PXA255 nCS2. User could

use this pin as chip select pin to

control the solution IC on carrier

board. This pin is reserved for user

Sync input of the LCD panel. For STN displays, t to the Frame Clock input of the LCD panel. This output indicates the start of a new frame of pixels. The panel needs to reset its line pointers to the top of the screen.

197 LP_HSYNC O Flat Panel TFT Vertical Sync/STN

Frame Pulse. For TFT displays, this output connects to the Vertical Sync input of the LCD panel. For

to the Frame Clock input of the LCD panel. This output indicates the start of a new frame of pixels. The panel needs to reset its line pointers to the top of the screen.

198 199

GND P Ground -

M_DE O

No pulling

pixel data.

200

SHCLK O Flat Panel Pixel Clock. The active

No pulling edge of FPCLK is programmable. The LCD panel uses this clock when loading pixel data into its Line Shift register. This signal

LVDS transmitter.

¦100-pin B2B connector Pin Out Table (X1 connector, For AMI interface)

Pin No.

Signals Type

B1 nBUF_CS2 O

Description

Static chip selects.

be used with variable l

Default

state

Pull-high

with 100K

ohm

to use.

Your ePlatform Partner

User’s Manual for Advantech SOM-A2552 series module V1.00

Connect

to the output enables of memory

Connect to the

Signals that the current transaction

Variable Latency I/O Ready pin.

ler when

an external bus device is ready to

Connect to the row

address strobe (RAS) pins for all

Connect to

the chip select (CS) pin for SDRAM.

For the PXA255 processor

A1 ADDR15 O SoC PXA255 system address 15 No pulling B2 ADDR14 O SoC PXA255 system address 14 No pulling A2 ADDR13 O SoC PXA255 system address 13 No pulling B3 ADDR12 O SoC PXA255 system address 12 No pulling A3 ADDR11 O SoC PXA255 system address 11 No pulling B4 ADDR10 O SoC PXA255 system address 10 No pulling A4 ADDR9 O SoC PXA255 system address 9 No pulling B5 ADDR8 O SoC PXA255 system address 8 No pulling A5 ADDR24 O SoC PXA255 system address 24 No pulling B6 ADDR25 O SoC PXA255 system address 25 No pulling

Memory output enable pin.

A6 nBUF_OE O

No pulling

devices to control data bus drivers.

B7 ADDR20 O SoC PXA255 system address 20 No pulling

Memory write enable.

A7 nBUF_WE O

write

No pulling

enables of memory devices.

B8 ADDR22 O SoC PXA255 system address 22 No pulling

BUF_RD_nW

Read/Write for static interface.

is a read or write.

No pulling

B9 GND P Ground -

Pull high

with

100Kohm

A9 BUF_RDY I

Notifies the memory control transfer data.

B10 DATA15 IO SoC PXA255 system data 15 No pulling A10 DATA14 IO SoC PXA255 system data 14 No pulling B11 DATA13 IO SoC PXA255 system data 13 No pulling A11 DATA12 IO SoC PXA255 system data 12 No pulling B12 DATA11 IO SoC PXA255 system data 11 No pulling A12 DATA10 IO SoC PXA255 system data 10 No pulling B13 DATA9 IO SoC PXA255 system data 9 No pulling A13 DATA8 IO SoC PXA255 system data 8 No pulling B14 DATA31 IO SoC PXA255 system data 31 No pulling A14 DATA30 IO SoC PXA255 system data 30 No pulling B15 DATA29 IO SoC PXA255 system data 29 No pulling A15 DATA28 IO SoC PXA255 system data 28 No pulling B16 DATA27 IO SoC PXA255 system data 27 No pulling A16 DATA26 IO SoC PXA255 system data 26 No pulling B17 DATA25 IO SoC PXA255 system data 25 No pulling A17 DATA24 IO SoC PXA255 system data 24 No pulling

nBUF_SDRA

B18

SDRAM RAS.

banks of SDRAM.

No pulling

SDRAM CS for bank 0.

nBUF_SDCS

A18

No pulling

nBUF_SDCS0 can be Hi-Z.

Your ePlatform Partner

User’s Manual for Advantech SOM-A2552 series module V1.00

SDRAM DQM for data byte 0.

Connect to the data output mask

SDRAM DQM for data byte 2.

Connect to the data output mask

SDRAM DQM for data byte 3.

Connect to the data output mask

Driven low by

the PCMCIA card to extend the

length of the transfers to/from the

Connect SDCLK

[1] to the clock pins of SDRAM in

bank pairs 0/1. They are driven by

l memory controller

clock, or the internal memory

controller clock divided by 2. At

reset, all clock pins are free running

at the divide by 2 clock speed and

may be turned off via free running

control register bits in the memory

roller

also provides control register bits for

clock division and deassertion of

each SDCLK pin. SDCLK[2:1]

control register assertion bits are

SDRAM and/or Synchronous Static

Connect to

the clock enable pins of SDRAM. It is

deasserted during sleep.

BUF_SDCKE1 is always deasserted

upon reset. The memory controller

provides control register bits for

255F

B19 BUF_DQM0 O

A19 BUF_DQM2 O

B20 BUF_DQM3 O

A20 nBUF_PWAIT I

BUF_SDCLK

B21

enables (DQM) for SDRAM.

enables (DQM) for SDRAM. PCMCIA wait. (input)

PXA255 processor.

SDRAM Clock 1.

either the interna

controller. The memory cont

No pulling

Pull high

with

100Kohm

No pulling

always deasserted upon reset. Memory clock enable.

No pulling

(For

BUF_SDCKE

A21

SOM-

BUF_SDC

KE1)

deassertion.

B22 GND P Ground - A22 ADDR0 O SoC PXA255 system address 0 No pulling B23 ADDR1 O SoC PXA255 system address 1 No pulling A23 ADDR2 O SoC PXA255 system address 2 No pulling B24 ADDR3 O SoC PXA255 system address 3 No pulling A24 ADDR4 O SoC PXA255 system address 4 No pulling B25 ADDR5 O SoC PXA255 system address 5 No pulling A25 ADDR6 O SoC PXA255 system address 6 No pulling B26 ADDR7 O SoC PXA255 system address 7 No pulling A26 ADDR16 O SoC PXA255 system address 16 No pulling B27 ADDR17 O SoC PXA255 system address 17 No pulling A27 ADDR18 O SoC PXA255 system address 18 No pulling

Your ePlatform Partner

User’s Manual for Advantech SOM-A2552 series module V1.00

Connect to the

column address strobe (CAS) pins

the chip select (CS) pins for SDRAM.

For the PXA255 processor nSDCS0

SDRAM DQM for data bytes 1.

Connect to the data output mask

Connect

BUF_SDCLK[2] to the clock pins of

SDRAM in bank pairs 2/3. They are

by either the internal memory

controller clock, or the internal

memory controller clock divided by

2. At reset, all clock pins are free

running at the divide by 2 clock

speed and may be turned off via free

running control register bits in the

oller. The memory

controller also provides control

deassertion of each SDCLK pin.

SDCLK[2:1] control register

assertion bits are always deasserted

the

PCMCIA card that the current

address is a valid 16 bit wide I/O

B28 ADDR19 O SoC PXA255 system address 19 No pulling A28 ADDR21 O SoC PXA255 system address 21 No pulling B29 ADDR23 O SoC PXA255 system address 23 No pulling A29 DATA0 IO SoC PXA255 system data 0 No pulling B30 DATA1 IO SoC PXA255 system data 1 No pulling A30 DATA2 IO SoC PXA255 system data 2 No pulling B31 DATA3 IO SoC PXA255 system data 3 No pulling A31 DATA4 IO SoC PXA255 system data 4 No pulling B32 DATA5 IO SoC PXA255 system data 5 No pulling A32 DATA6 IO SoC PXA255 system data 6 No pulling B33 DATA7 IO SoC PXA255 system data 7 No pulling A33 DATA16 IO SoC PXA255 system data 16 No pulling B34 DATA17 IO SoC PXA255 system data 17 No pulling A34 DATA18 IO SoC PXA255 system data 18 No pulling B35 DATA19 IO SoC PXA255 system data 19 No pulling A35 DATA20 IO SoC PXA255 system data 20 No pulling B36 DATA21 IO SoC PXA255 system data 21 No pulling A36 DATA22 IO SoC PXA255 system data 22 No pulling B37 DATA23 IO SoC PXA255 system data 23 No pulling

nBUF_SDCA

A37

SDRAM CAS.

for all banks of SDRAM.

No pulling

SDRAM CS for banks 2. Connect to

nBUF_SDCS

B38

No pulling

can be Hi-Z, Nsdcs1-3 cannot.

A38 BUF_DQM1 O

BUF_SDCLK

B39

A39 nBUF_IOIS16 I

enables (DQM) for SDRAM.

SDRAM Clock 2.

driven

memory contr

upon reset. IO Select 16. Acknowledge from

No pulling

Pull high

with

100Kohm

Your ePlatform Partner

User’s Manual for Advantech SOM-A2552 series module V1.00

Performs

writes to PCMCIA memory and to

PCMCIA attribute space. Also used

as the write enable signal for

GPIO pin. Advantech default

function is used as matrix Keypad

IRQ. The pin directly connects to

PXA255 GPIO2 (L13 pin). If user

doesn’t use the matrix key pad

function, use can use this pin as

GPIO pin. The pin directly connects

to PXA255 GPIO7 (G15 pin). This

255F

Advantech use this pin to control

chip as IRQ function.

The pin is not available for CSB

A2558 &

A2558

A255F user must float this

pin. This pin is directly connected to

sed

as external 16C950 solution IC IRQ.

The pin directly connects to PXA255

GPIO10 (F7 pin). If user doesn’t

design 16C950 on CSB to expand

COM function, user could use this

Advantech default function is used

rnal LAN solution IC IRQ. The

pin directly connects to PXA255

GPIO17 (D12 pin). If user doesn’t

design the other LAN chip on CSB to

expand LAN function, user could use

Advantech default function is used

al USB host solution IC

IRQ. The pin directly connects to

PXA255 GPIO27 (B9 pin). If user

doesn’t design the other USB

solution chip on CSB to expand USB

host function, user could use this pin

address. PCMCIA write enable.

B40 nBUF_PWE O

A40 KEYPAD_IRQ I

B41

N.C. - N.C. just float this pin. -

A41 PXA_GP7 IO

B42 EVA_IRQ -

Variable Latency I/O.

GPIO pin.

GPIO pin is available for user to use.

companion design of SOM-

SOM-A255F platform. SOM& SOM-

No pulling

(For

SOM-

PXA_GPIO

C950_485_IR

A42

B43 LAN1_IRQ I

A43 USB_IRQ I

SoC PXA255 GPIO9(F12). Advantech default function is u

pin as GPIO. as exte

this pin as GPIO. as extern

as GPIO.

No pulling

Your ePlatform Partner

User’s Manual for Advantech SOM-A2552 series module V1.00

is used

as external 16C954 solution IC IRQ.

The pin directly connects to PXA255

GPIO32 (A16 pin). If user doesn’t

design 16C950 on CSB to expand

COM function, user could use this

GPIO pin. The pin directly connects

to PXA255 GPIO81 (F16 pin). This

GPIO pin. The pin directly connects

to PXA255 GPIO82 (E16 pin). This

rectly connects

to PXA255 GPIO83 (E15 pin). This

GPIO pin. The pin directly connects

to PXA255 GPIO84 (D16 pin). This

Chip selects to

static memory devices such as ROM

and Flash. Individually

programmable in the memory

configuration registers. nBUF_CS1

can be used with variable latency I/O

devices. Advantech default uses this

ct pin. If

no special application, Advantech

strongly suggest user to open this

Chip selects to

static memory devices such as ROM

and Flash. Individually. nBUF_CS4

iable latency I/O

Advantech default use this pin as

companion chip chip select pin.

nBUF_CS4 pin is used for

A255F &

A2552 series. If no special

application, Advantech strongly

Chip selects to

static memory devices such as ROM

programmable in the memory

configuration registers. nBUF_CS3

can be used with variable latency I/O

I/O

Advantech default function

B44 C954_IRQ I

A44 PXA_GP81 IO

B45 PXA_GP82 IO

A45 PXA_GP83 IO

B46 PXA_GP84 IO

A46 nBUF_CS1 O

No pulling

pin as GPIO.

No pulling

GPIO pin is available for user to use.

No pulling GPIO pin is available for user to use. GPIO pin. The pin di

No pulling GPIO pin is available for user to use.

No pulling GPIO pin is available for user to use. Static chip selects.

Pull high

with

100Kohm pin as storage flash chip sele

B47 nBUF_CS4 O

A47 nBUF_CS3 O

pin in CSB. Static chip selects.

can be used with var devices.

EVA-C210 on SOMSOM-

suggest user to open this pin in CSB. Static chip selects.

and Flash. Individually

devices. Advantech uses the pin as

Pull high

with

100Kohm

Pull high

with

100Kohm

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User’s Manual for Advantech SOM-A2552 series module V1.00

memory block. About detail

description, please reference

A255x series Memory and

Chip selects to

static memory devices such as ROM

and Flash. Individually

n the memory

configuration registers. nBUF_CS5

can be used with variable latency I/O

Advantech default uses the pin as

display chip chip select pin.

nBUF_CS4 pin is used for SM501 on

A255F series. If

strongly suggest user to open this

Notifies

the DMA Controller that an external

device requires a DMA transaction. If

user wants to design a controller in

e check

first.

If use doesn’t want to use this pin as

DMA_REQ, use could use the pin as

GPIO. The pin connects to SoC

troller alternate bus

Allows an external

device to request the system bus

from the Memory Controller. If user

wants to design a controller in CSB

with this pin function, please check

If use doesn’t want to use this pin as

DMA_REQ, use could use the pin as

GPIO. The pin connects to SoC

Channel 1 DMA acknowledge.

Notifies an external device that it has

cknowledged the DMA

controller. If user wants to design a

controller in CSB with DMA mode,

please check with

If use doesn’t want to use this pin as

pin as

GPIO. The pin connects to SoC

“SOMInterrupt Map”.

Static chip selects.

programmable i

B48 nBUF_CS5 O

A48 DMA_REQ1 I

devices.

SOM-A2552 & SOMno special application, Advante

pin in CSB. Channel 1 DMA Request.

CSB with DMA mode, pleas with ae.risc@advantech.com.tw

PXA255 GPIO19. Memory Con master request.

Pull high

with

100Kohm

Pull low

with 1Kohm

B49 MBREQ I

A49 DMA_ACK1 O

with ae.risc@advantech.com.tw first.

PXA255 GPIO14.

been a

ae.risc@advantech.com.tw first.

DMA_ACK, use could use the PXA255 GPIO22.

Pull low

with 1Kohm

No pulling

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User’s Manual for Advantech SOM-A2552 series module V1.00

Notifies an

external device that it has been

granted the system bus. If user

wants to design a controller in CSB

with this pin function, please check

first.

If use doesn’t want to use this pin as

MBGNT, use could use the pin as

GPIO. The pin connects to SoC

from

Memory Controller grant.

B50 MBGNT O

with ae.risc@advantech.com.tw

Pull low

with 1Kohm

PXA255 GPIO13.

A50 3M6864 O

3.6864 MHz clock. Output

3.6864 MHz oscillator.

No pulling

¦100-pin B2B connector Pin Out Table (X3 connector for PCI, ZV port,

MMC interface and Misc. function)

Pin No.

B1 N.C. - N.C. just float this pin. - A1 N.C. - N.C. just float this pin. - B2 N.C. - N.C. just float this pin. - A2 N.C. - N.C. just float this pin. - B3 N.C. - N.C. just float this pin. - A3 N.C. - N.C. just float this pin. - B4 N.C. - N.C. just float this pin. - A4 N.C. - N.C. just float this pin. - B5 N.C. - N.C. just float this pin. - A5 N.C. - N.C. just float this pin. - B6 N.C. - N.C. just float this pin. - A6 N.C. - N.C. just float this pin. - B7 N.C. - N.C. just float this pin. - A7 N.C. - N.C. just float this pin. - B8 N.C. - N.C. just float this pin. - A8 N.C. - N.C. just float this pin. - B9 N.C. - N.C. just float this pin. - A9 N.C. - N.C. just float this pin. -

B10 A10 B11 A11 B12 A12 B13 A13 B14 A14 B15

Signals Typ

Model Default state

GND P Ground -

N.C. - N.C. just float this pin. -

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User’s Manual for Advantech SOM-A2552 series module V1.00

function, user could use this pin as

need MMC/SD function, user could

A15 B16 A16 B17 A17 B18 A18 B19 A19 B20 A20 B21 A21 B22 A22 B23 A23 B24 A24 B25 A25 B26 A26 B27 A27 B28 A28 B29 A29 B30 A30 B31 A31 B32 A32 B33 A33 B34 A34 B35

A35

N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. -

GND P Ground -

N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. -

GND P Ground -

N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. just float this pin. - N.C. - N.C. float this pin. - N.C. - N.C. float this pin. -

SD/MMC interface card detect pin. If user doesn’t need MMC/SD

Pull high with

100Kohm

nMMCD I

GPIO. The pin connects to SoC PXA255 GPIO12. MMC clock. Clock signal for the

No pulling

MMC Controller. If user doesn’t

MMCLK O

use this pin as GPIO. The pin connects to SoC PXA255 GPIO6.

Your ePlatform Partner

Chip select pin for MMC controller.

function, user could use this pin as

No pulling (For

5:6:5 mode or Y[7] video pixel input

pixel input

5:6:5 mode or Y[5] video pixel input

5:6:5 mode or Y[4] video pixel input

5:6:5 mode or Y[3] video pixel input

RGB 5:6:5 mode or Y[2] video pixel

RGB 5:6:5 mode or Y[1] video pixel

RGB 5:6:5 mode or Y[0] video pixel

B36

A36 B37

A37 B38 A38 B39 A39 B40

A40

B41

User’s Manual for Advantech SOM-A2552 series module V1.00

MMDAT3/

MMCCS0

If user doesn’t need MMC/SD

GPIO. The pin connects to SoC

SOM-255F is

PXA255 GPIO8.

MMCMD IO

MMDAT0 IO

Multimedia Card Command. Multimedia Card Data pin.

Pull high with Pull high with

10Kohm (For SOM-255F is

N.C. - N.C. float this pin. - N.C. - N.C. float this pin. - N.C. - N.C. float this pin. - N.C. - N.C. float this pin. - N.C. - N.C. float this pin. -

16-bit R[4] video pixel input for

ZV15 I

RGB for YUV 4:2:2 mode.

16-bit R[3] video pixel input for

ZV14 I

RGB 5:6:5 mode or Y[6] video for YUV 4:2:2 mode. 16-bit R[2] video pixel input for

ZV13 I

RGB

MMCCS0)

10Kohm

MMCDAT)

No pulling

A41

B42

A42

B43

A43

B44

ZV12 I

ZV11 I

ZV10 I

ZV9 I

ZV8 I

ZV7 I

for YUV 4:2:2 mode. 16-bit R[1] video pixel input for RGB

for YUV 4:2:2 mode. 16-bit R[0] video pixel input for RGB

for YUV 4:2:2 mode. 16-bit G[5] video pixel input for

input for YUV 4:2:2 mode. 16-bit G[4] video pixel input for

input for YUV 4:2:2 mode. 16-bit G[3] video pixel input for

input for YUV 4:2:2 mode. 16-bit G[2] video pixel input for RGB 5:6:5 mode, U[7] video pixel input for YUV 4:2:2 mode, or V[7] video pixel input for YUV 4:2:2

No pulling

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rrent scan line and the

A44

B45

A45

B46

A46

B47

A47

B48 A48 B49

A49 B50

User’s Manual for Advantech SOM-A2552 series module V1.00

mode. 16-bit G[1] video pixel input for RGB 5:6:5 mode, U[6] video pixel

ZV6 I

input for YUV 4:2:2 mode, or V[6] video pixel input for YUV 4:2:2 mode. 16-bit G[0] video pixel input for RGB 5:6:5 mode, U[5] video pixel

ZV5 I

input for YUV 4:2:2 mode, or V[5] video pixel input for YUV 4:2:2 mode. 16-bit B[4] video pixel input for RGB 5:6:5 mode, U[4] video pixel

ZV4 I

input for YUV 4:2:2 mode, or V[4] video pixel input for YUV 4:2:2 mode. 16-bit B[3] video pixel input for RGB 5:6:5 mode, U[3] video pixel

ZV3 I

input for YUV 4:2:2 mode, or V[3] video pixel input for YUV 4:2:2 mode. 16-bit B[2] video pixel input for RGB 5:6:5 mode, U[2] video pixel

ZV2 I

input for YUV 4:2:2 mode, or V[2] video pixel input for YUV 4:2:2 mode. 16-bit B[1] video pixel input for RGB 5:6:5 mode, U[1] video pixel

ZV1 I

input for YUV 4:2:2 mode, or V[1] video pixel input for YUV 4:2:2 mode. 16-bit B[0] video pixel input for RGB 5:6:5 mode, U[0] video pixel

ZV0 I

input for YUV 4:2:2 mode, or V[0] video pixel input for YUV 4:2:2 mode.

SDAZV IO SCLZV O

TV-in control serial data input/output (I2C-bus). TV-in control serial clock output (I2C-bus)

Pull high with Pull high with

Horizontal Sync. A falling or rising

VPHREF I

edge on this input indicates the end of the cu beginning of the next.

GND P Ground -

Vertical Sync. A rising or falling edge on

VPVSYNC I

this input indicates the end of the current capture field and the beginning

No pulling

4.71Kohm

4.71Kohm No pulling

No pulling

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User’s Manual for Advantech SOM-A2552 series module V1.00

of the next one. The state of VPHSYNC determines whether the current capture field is ODD (VPHREF is High on the active edge of VPVSYNC) or EVEN (VPHREF is Low on the active edge of VPVSYNC).

A50

VPCLK I

Pixel Clock. VPCLK is the reference clock for data on the

No pulling

ZV[31:0] video pixel bus.

2.2 function description

2.2.1 System Bus

System Bus includes PXA255 address bus, data bus, memory control signals and GPIOs. System Bus enters CSB by X1. In order to make sure that system bus signals have perfect electrical waves, System Bus signals are driven by buffers to enhance signals performance.

Data Bus

Strengthed Data Bus

PXA255

Address Bus

Memory Control signals

Buffers

Strengthed Address Bus

Strengthed Memory Control signals

X1 conn.

The buffers signals direction control is control by CPLD on SOM-A255x

module.

2.2.2 COM

SOM-A255x series (SOM-A2552, SOM-A2558, SOM-A255F) all support 5 x RS-232 ports: 3 full function (FF) RS-232 ports, 1x 2-wire (RX, TX) RS-232 and 1x 3-wire (RX, TX, RTS) RS-232 port. COM port function assignments are as following:

Ø COM1: FF RS-232 Ø COM2: FF RS-232 Ø COM3: FF RS-232 Ø COM4: 2-wire (RX, TX) RS-232 Ø COM5: 3-wire (RX, TX, RTS) RS-232

All RS-232 ports are TTL levels.

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According to user target CSB demand, user could define COM5 as 3-wire (RX, TX, RTS) RS-232 port or pass through RS-485 transceiver to act as RS-485 function. User could references “Advantech SOM-A255x series CSB design guide “to design the COM5.

2.2.3 USB 1.1 Host

SOM-A255F & SOM-A2558 series supports 2 USB host ports. SOM-A2552 series supports 1 USB host port. The USB host ports on the SOM-A255x are USB 1.1 compatible. The default Windows CE.NET and Linux on board support USB keyboards, mice and mass storage devices. User could check the " SOM-A255x series verified compatible peripherals list " to know the verified compatible peripherals. If user wants to connect other devices, it may take customization on the Windows CE.

2.2.4 USB 1.1 client The USB client port on the SOM-A255x is USB 1.1 compatible. USB client

connector is used to communicate with master device (ex: PC) for ActiveSync. About SOM-A255x series ActiveSync installation, please reference to

“Installation Guide-Advantech RISC platform with Microsoft ActiveSync 3.7”.

2.2.5 T/S

SOM-A255x series supports 4-wires (X+, X-, Y+, Y-) resistive T/S interface.

2.2.6 PCMCIA/CF

All SOM-A255x series supports 2 PCMCIA interface (I/F) or 2 CF I/F or 1 PCMCIA & 1 CF I/F. User could check “ SOM-A255x Series Carrier Board Design Guide “ to know how to design the I/F. PCMCIA/CF I/F power control circuit is designed on SOM module, so PCMCIA/CF I/F is hot-swappable. Advantech strongly suggest user to design one CF or one PCMCIA

slot on user’s target carrier board, even user doesn’t need this port in target product. Advantech platform always use CF or PCMCIA slot to be system S/W upgrading port. If user doesn’t design 1 CF or PCMCIA slot on carrier board, user will run into trouble when user wants to upgrade image, boot loader & boot-logo.

2.2.7 SD/MMC

All SOM-A255x series supports 1 slot SD/MMC port. The Multi Media Card (MMC) is a low cost data storage and communication media. The MMC controller in the SOM-A255x is compliant with The Multi Media Card System Specification, Version 2.1. The only exception is one and three byte data transfers are not supported. SD/MMC I/F in SOM-A255x only support 1-bit memory mode, not support I/O mode.

2.2.8 Audio (AC’97 Codec on board)

All SOM-A255x uses Realtek ALC202 AC97 audio Codec on SOM

module. SOM-A255x series provides mono microphone-in, stereo line-in, and

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stereo line-out interface. If users want to drive speakers, users could follow the “Advantech SOM-A255x series CSB design guide “to design the audio amplifier on CSB.

2.2.9 CRT-out

SOM-A255F & SOM-A2552 series supplies CRT-out I/F which resolution is up to 1024*768. CRT-out function comes from SM501. CRT-out signals are all analog signals; user must follow the analog signals layout rules. SOM-A2558 series doesn’t support CRT-out function, but user could design CRT-out solution IC on CSB to add the function on SOM-A2558 platform. About detail implement way, please check “Advantech SOM-A255x series CSB design guide “.

2.2.10 LCD TTL interface w/LCD Brightness & Contrast Control interface

SOM-A2552 & SOM-A255F series LCD-out interface comes from SM501. SOM-A2552 & SOM-A255F LCD-out supports 24 bit and resolution up to 1024*768. SOM-A2552 & SOM-A255F supports both active and passive LCD displays. SOM-A2558 series LCD-out function comes from SoC PXA255. SOM-A2558 LCD-out supports 16 bit and resolution up to 800*600.

The LCD signals are 3.3V level in X2. If users’ CSB want to drive 5V level panel, users could design buffers on CSB to translate LCD signals level. User could refer “Advantech SOM-A255x series CSB design guide “. Advantech design LCD brightness control circuit & LCD contrast control circuit on SOM-A255x series modules. STN LCD panel needs contrast control signals. In X2, LCD contrast control signals are nVCONR_INC, VCONR_CS and VCONR_UnD. The control signals are based on DALLAS DS1804 NV Trimmer Potentiometer to design. Users could check the “Advantech SOM-A255x series CSB design guide “ to know how to wire. User could check “to know how to control.

Brightness control signals are used to control the LCD backlight inverter lamp current. In X2, LCD brightness control signals are nVBRIR_INC, VBRIR_CS and nVBRIR_UnD. The control signals are based on DALLAS DS1804 NV Trimmer Potentiometer to design. Users could check the “Advantech SOM-A255x series CSB design guide “to know how to wire. User could check appendix about SOM-A255F memory map to know how to control.

If user wants to connect CSB to LVDS type LCD, user could reference “Advantech SOM-A255x series CSB design guide “to design LVDS Transmitter on CSB. SOM-A255x series only support 1 channel LVDS LCD panel.

The sample images of SOM-A2552, SOM-A255F series could support 4 kinds of display modes:

l 320x240 TFT: In SOM-A2552 & SOM-A255F module, user

CAN’T verify the performance by Advantech LCD kit LCD-A057-STQ1-0. Because SOM-A2552 & SOM-A255F supports 320x240 TFT mode, but LCD-A057-STQ1-0 is 320x240 STN panel.

l 640x480 TFT: user could verify the performance by Advantech

LCD kit LCD-A064-TTV1-0.

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l 800x600 TFT: user could verify the performance by Advantech

LCD kit LCD-A104-TTS1-0.

l 1024x768 TFT: user could verify the performance by Advantech

LCD kit LCD-A150-TTX2-0.

Except 320x240 TFT mode, user could verify the LCD-out function by Advantech LCD kit. Advantech LCD kit LCD-A057-STQ1-0 is 320x240 STN type LCD, not TFT type, so user couldn’t verify the 320x240 TFT function by sample images.

The sample images of SOM-A2558 series could support 4 kinds of display modes:

l 320x240 STN: User can use Advantech LCD kit

LCD-A057-STQ1-0 to evaluate the LCD-out performance of SOM-A2558 platform.

l 640x480 TFT: User can use Advantech LCD kit

LCD-A064-TTV1-0 to evaluate the LCD-out performance of SOM-A2558 platform.

2.2.11 Zoom Video (ZV) port

SOM-A255F & SOM-A2552 series ZV port comes from SM501. SOM-A2558 series don’t support the function. ZV Port can interface with video decoders, such as NTSC/PAL decoders, MPEG-2 decoders, and JPEG Codec. The ZV Port supports resolutions up to 1280x1024. It directly accepts digitized RGB or YUV signals, and does not accept analog signals.

In 16-bit mode, the ZV [15:8] signals are the most-significant eight video pixel inputs. In 8-bit mode, these signals are not used. In 16-bit mode, the ZV [7:0] signals are the least-significant eight video pixel inputs. In 8-bit mode, these signals are the only eight video pixel inputs. About how to wire the ZV port with NTSC/PAL decoders, please check “Advantech SOM-A255x series CSB design guide “.

2.2.12 System Reset Interface

SOM-A255x series all supply 3 kinds of System reset interface as following:

Ø nRESET : hardware reset input pin. The pin is pulled high in

SOM-A255F. The pin is triggered by signal falling edge.

Ø nSW_RESET : software rest input pin. The pin is pulled high in

SOM-A255F. The pin is triggered by signal falling edge.

Ø nSA_PWR_ON : Suspend/wake-up pin. The pin is pulled high in

SOM-A255F. The pin is triggered by signal falling edge.

2.2.13 Buzzer Control Interface

SOM-A255x series all support this function. Buzzer-out control signal is designed to control the buzzer on/off status.

If users want to design buzzer on CSB to be reminding or alarm system, user could reference “Advantech SOM-A255x series CSB design guide “.

If users want to control the buzzer, users can check the memory map to do it.

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2.2.14 System Management Bus (SM Bus) interface

SOM-A255x series SM Bus is implemented by PXA255 I2C bus. If users’ CSB is powered by battery pack with SM bus battery gauge IC, then users could connect the SOM-A255x SM Bus to battery pack to monitor battery status. SOM-A255x series SM bus directly support TI BQ2040 gas gauge IC.

2.2.15 Power-input

SOM-A255x needs 3.3V & 5V DC power inputs. The power sources (3.3V, 5V) must always be supplied even in system sleep mode. SOM-A255x power management is completely implemented on itself; users’ CSB doesn’t need to control the power supply to SOM-A255x.

2.2.16 Back-up power input

If user want to keep the real time clock(RTC) works well in power off mode, user should connect the coin battery positive pin to BAT-VCC in X2 directly .The back-up power pin (BAT_VCC) is the only power source to supply RTC power when SOM-A255x system power (3.3V, 5V) is off. The coin battery must be 3.0V Li-ion coin type. The coin battery charging circuit is designed on SOM-A255x, so user shouldn’t and needn’t design the charging circuit on CSB. If users don’t need RTC function in CSB, just let the BAT_VCC pin open.

2.2.17 PCI I/F (Thru X3) SOM-A2558 & SOM-A255F could support 4 channels PCI device

controllers on CSB. The PCI clock is 33 MHz. PCI I/F comes from Advantech EVA-C210 I/O enhancement chip. The PCI I/F feature is as followings:

- Compatible with PCI specification version 2.2

- 32-bit data bus interface

- Built-in PCI bus arbiter

- Supports up to 3 individual external bus master devices

- Support PCI Bus Controller (FPCI) to PCI slave I/O read/write,

memory read/write, configuration read/write cycle

- PCI Bus master support all disconnect types (Master-Abort, Target-Abort, Target-Retry, Disconnect with data, Disconnect without data)

SOM-A2552 series don’t support PCI I/F.

Advantech SOM-A2552 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual