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 vo5 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