3 ddram memory on msm800bev, 8 interfaces, 1 at compatible keyboard & ps/2 mouse x31 – Kontron MSM800BEV User Manual
Page 43: 2 line printer port lpt1, 3 serial ports com1-com2, Ddram memory on msm800bev, Interfaces, At compatible keyboard & ps/2 mouse x31, Line printer port lpt1, Serial ports com1-com2
MSM800BEV
/ Detailed System Description
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6.7.3 DDRAM Memory on MSM800BEV
Speed
333
Size
DDR-SODIMM
DDRDIMM 200pin
Bits
64bit
Capacity
256-1024 MByte
DDR-SODIMM
Bank
1
6.8 Interfaces
6.8.1 AT Compatible Keyboard & PS/2 Mouse X31
Pin
Signal
1
Speaker out
2
GND
3
External reset input
4
VCC
5
Keyboard Data
6
Keyboard Clock
7
GND
8
Battery
9
Mouse Clock (PS/2)
10
Mouse Data (PS/2)
BAT input 3.0-3.6V, external lithium battery (see also Section 6.4.1).
6.8.2 Line Printer Port LPT1
A standard bi-directional LPT port is integrated into the MICROSPACE PC.
Further information about these signals is available in numerous publications, including the IBM technical reference
manuals for the PC and AT computers and from other reference documents.
The current is:
IOH = 12mA
IOL = 24mA
6.8.3 Serial Ports COM1-COM2
The serial channels are fully compatible with 16C550 UARTS. COM1 is the primary serial port and is supported by the
board's ROM-BIOS as the PC-DOS 'COM1' device. The secondary serial port is COM2; it is supported as the 'COM2'
device.
Standard:
COM 1/2:
National PC87317VUL:
2 x 16C550 compatible serial interfaces
Serial Port Connectors COM1, COM2:
Pin
Signal
Function
in/out
DB25 Pin
DB9 Pin
1
CD
Data Carrier Detect
in
8
1
2
DSR
Data Set Ready
in
6
6
3
RXD
Receive Data
in
3
2
4
RTS
Request To Send
out
4
7
5
TXD
Transmit Data
out
2
3
6
CTS
Clear to Send
in
5
8
7
DTR
Data Terminal Ready
out
20
4
8
RI
Ring Indicator
in
22
9
9
GND
Signal Ground
7
5
The serial port signals are compatible with the RS232C specifications.