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User’s Manual for Advantech SOM-A2552 series module V1.00
15
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.