CM312 Datasheet, PDF (24/56 Pages) List of Unclassifed Manufacturers – Communications utilityModule

Table 6 PC/104 AT Bus Connector
PC/104 AT Bus Connector, CN2
Pin
Row C
Row D
0
0V
0V
1
SBHE*
MEMCS16*
2
LA23
IOCS16*
3
LA22
IRQ10
4
LA21
IRQ11
5
LA20
IRQ12
6
LA19
IRQ15
7
LA18
IRQ14
8
LA17
DACK0*
9
MEMR*
DRQ0
10
MEMW*
DACK5*
11
SD8
DRQ5
12
SD9
DACK6*
13
SD10
DRQ6
14
SD11
DRQ6
15
SD12
DRQ7
16
SD13
+5V
17
SD14
MASTER*
18
SD15
0V
19
(KEYING PIN)
0V
Note:
Two locations on the bus have mechanical keying pins to help prevent misconnection
of the PC/104 bus. These keying pins are a part of the PC/104 standard, and we
strongly recommend you leave them in place.
If you have other modules without keying pins, we suggest you modify them to
include keying.
First COM port, CN3
The first serial port is implemented on connector CN3. It can be configured as a PC compatible
full duplex RS232 port or as half- or full duplex RS422 or RS485 through mode jumper JP8. The
I/O address is configurable in respect to SW1 address table, and corresponding interrupt is also
selectable through jumper JP1 to be IRQ3, IRQ4, IRQ5, IR6, IRQ7, IRQ9, IRQ10, IRQ11, IRQ12,
IRQ14 and IRQ15. But you need to make sure that there are no resource conflicts on the I/O base
address and interrupt line you choose.
The serial port is implemented with a 16C550-compatible UART (Universal Asynchronous
Receiver/Transmitter). This UART is capable of baud rates up to 1.5 M with the 24 MHz clock
input and 115.2K with the 24 MHz / 13 clock input.
CM312 Quad Serial utilityModule
14
RTD Embedded Technologies, Inc.