4-8
Computer Group Literature Center Web Site
Connector Pin Assignments
4
PCI Mezzanine Card Connectors (J11/J12/J13/J14)
Four 64-pin connectors (J11/J12/J13/J14 on the MCP750) supply the
interface between the base board and an optional PCI mezzanine card
(PMC). The pin assignments are listed in the following two tables:
5
DMARQ
IORDY
DIOW_L
DMACK_L
DIOR_L
5
4
DD14
DD0
GND
DD15
INTRQ
4
3
DD3
DD12
DD2
DD13
DD1
3
2
DD9
DD5
DD10
DD4
DD11
2
1
RESET_L
DRESET_L
DD7
DD8
DD6
1
Table 4-6. PCI Mezzanine Card Connector
J11
J12
1
TCK
–12V
2
1
+12V
TRST
∗
2
3
GND
PMCINTA
∗
4
3
TMS
TDO
4
5
PMCINTB
∗
PMCINTC
∗
6
5
TDI
GND
6
7
PMC1P
∗
+5V
8
7
GND
Not Used
8
9
PMCINTD
∗
Not Used
10
9
Not Used
Not Used
10
11
GND
Not Used
12
11
Pull-up
+3.3V
12
13
PCICLK
GND
14
13
PCIRST
∗
Pull-down
14
15
GND
PMC1GNT
∗
16
15
+3.3V
Pull-down
16
17
PMC1REQ
∗
+5V
18
17
Not Used
GND
18
19
+5V
AD31
20
19
AD30
AD29
20
21
AD28
AD27
22
21
GND
AD26
22
23
AD25
GND
24
23
AD24
+3.3V
24
25
GND
CBE3
∗
26
25
IDSEL
AD23
26
27
AD22
AD21
28
27
+3.3V
AD20
28
29
AD19
+5V
30
29
AD18
GND
30
31
+5V
AD17
32
31
AD16
C/BE2
∗
32
33
FRAME
∗
GND
34
33
GND
Not Used
34
Table 4-5. J5 User I/O Connector (Continued)