Specifications

TME-104P-CSR-LX800-R1V11.doc Rev 1.11 30 (50)
3.18 PC/104 Bus Interface
The PC/104 bus is a modification of the industry standard (ISA) PC bus specified in IEEE P996. The PC/104 bus
has different mechanics than P966 to allow the stacking of modules. The main features are:
• Supports programmable extra wait state for ISA cycles
• Supports I/O recovery time for back-to-back I/O cycles
The following table shows the pin assignment of the PC/104 connector.
PC/104 Bus Connector
Pin A B
1
IOCHCK
GND
2 D7 RSTDRV
3
D6
+5 Volt
4 D5 IRQ9
5 D4 n.c.
6 D3 DRQ2
7 D2 -12 Volt
Pin D C 8 D1 n.c.
0
GND
GND
9
D0
+12 Volt
1 MEMCS16 SBHE 10 IOCHRDY n.c.
2 IOCS16 LA23 11 AEN SMEMW
3 IRQ10 LA22 12 A19 SMEMR
4
IRQ11
LA21
13
A18
IOW
5 IRQ12 LA20 14 A17 IOR
6 IRQ15 LA19 15 A16 DACK3
7 IRQ14 LA18 16 A15 DRQ3
8 DACK0 LA17 17 A14 DACK1
9 DRQ0 MEMR 18 A13 DRQ1
10
DACK5
MEMW
19
A12
REFRESH
11 DRQ5 SD8 20 A11 SYSCLK
12 DACK6 SD9 21 A10 IRQ7
13 DRQ6 SD10 22 A9 IRQ6
14 DACK7 SD11 23 A8 IRQ5
15 DRQ7 SD12 24 A7 IRQ4
16 +5 Volt SD13 25 A6 IRQ3
17 MASTER SD14 26 A5 DACK2
18 GND SD15 27 A4 TC
19 GND KEY 28 A3 BALE
29 A2 +5 Volt
30 A1 OSC
31 A0 GND
32 GND GND
Note:
The voltages +5 V, +12 V and -12 V are not generated by the onboard
power-supply but they are routed from the Power Supply Connector.
The maximum current is limited depending on voltage:
+12 V < 1 A; -12 V < 0,3 A; +5 V < 3 A
One pin can be used for 1 A at maximum.
X18