PCI Bus Mezzanine Card (PMC)

The PMC standard defines a family of mezzanine cards which use either 32 or 64-bit PCI bus, and are widely used for processor add-on boards. This page contains the essential details distilled from the relevant draft standards.


PMC Connector Locations

PMC Sides

PMC Mechanics

Connectors 1 and 2 - 32-bit PCI

P1/J1				P2/J2
Pin#	Signal	Signal	Pin#	Pin#	Signal	Signal	Pin#
1	TCK	-12V	2	1	+12V	TRST#	2
3	Ground	INTA#	4	3	TMS	TDO	4
5	INTB#	INTC#	6	5	TDI	Ground	6
7	BUSMODE1#	+5V	8	7	Ground	PCI-RSVD*	8
9	INTD#	PCI-RSVD*	10	9	PCI-RSVD*	PCI-RSVD*	10
11	Ground	PCI-RSVD*	12	11	BUSMODE2#	+3.3V	12
13	CLK	Ground	14	13	RST#	BUSMODE3#	14
15	Ground	GNT#	16	15	3.3V	BUSMODE4#	16
17	REQ#	+5V	18	17	PCI-RSVD*	Ground	18
19	V_IO	AD[31]	20	19	AD[30]	AD[29]	20
21	AD[28]	AD[27]	22	21	Ground	AD[26]	22
23	AD[25]	Ground	24	23	AD[24]	+3.3V	24
25	Ground	C/BE[3]#	26	25	IDSEL	AD[23]	26
27	AD[22]	AD[21]	28	27	+3.3V	AD[20]	28
29	AD[19]	+5V	30	29	AD[18]	Ground	30
31	V_IO	AD[17]	32	31	AD[16]	C/BE[2]#	32
33	FRAME#	Ground	34	33	Ground	PMC-RSVD	34
35	Ground	IRDY#	36	35	TRDY#	+3.3V	36
37	DEVSEL#	+5V	38	37	Ground	STOP#	38
39	Ground	LOCK#	40	39	PERR#	Ground	40
41	SDONE#	SBO#	42	41	+3.3V	SERR#	42
43	PAR	Ground	44	43	C/BE[1]#	Ground	44
45	V_IO	AD[15]	46	45	AD[14]	AD[13]	46
47	AD[12]	AD[11]	48	47	Ground	AD[10]	48
49	AD[09]	+5V	50	49	AD[08]	+3.3V	50
51	Ground	C/BE[0]#	52	51	AD[07]	PMC-RSVD	52
53	AD[06]	AD[05]	54	53	+3.3V	PMC-RSVD	54
55	AD[04]	Ground	56	55	PMC-RSVD	Ground	56
57	V_IO	AD[03]	58	57	PMC-RSVD	PMC-RSVD	58
59	AD[02]	AD[01]	60	59	Ground	PMC-RSVD	60
61	AD[00]	+5V	62	61	ACK64#	+3.3V	62
63	Ground	REQ64#	64	63	Ground	PMC-RSVD	64

Connectors 3, 4, 5 - 64-bit PCI and User Defined

P3/J3				P4,5 / J4,5
Pin#	Signal	Signal	Pin#	Pin#	Signal	Signal	Pin#
1	PCI-RSVD	Ground	2	1	I/O	I/O	2
3	Ground	C/BE[7]#	4	3	I/O	I/O	4
5	C/BE[6]#	C/BE[5]#	6	5	I/O	I/O	6
7	C/BE[4]#	Ground	8	7	I/O	I/O	8
9	V	(I/O	PAR64	10	9	I/O	I/O
11	AD[63]	AD[62]	12	11	I/O	I/O	12
13	AD[61]	Ground	14	13	I/O	I/O	14
15	Ground	AD[60]	16	15	I/O	I/O	16
17	AD[59]	AD[58]	18	17	I/O	I/O	18
19	AD[57]	Ground	20	19	I/O	I/O	20
21	V_IO	AD[56]	22	21	I/O	I/O	22
23	AD[55]	AD[54]	24	23	I/O	I/O	24
25	AD[53]	Ground	26	25	I/O	I/O	26
27	Ground	AD[52]	28	27	I/O	I/O	28
29	AD[51]	AD[50]	30	29	I/O	I/O	30
31	AD[49]	Ground	32	31	I/O	I/O	32
33	Ground	AD[48]	34	33	I/O	I/O	34
35	AD[47]	AD[46]	36	35	I/O	I/O	36
37	AD[45]	Ground	38	37	I/O	I/O	38
39	V_IO	AD[44]	40	39	I/O	I/O	40
41	AD[43]	AD[42]	42	41	I/O	I/O	42
43	AD[41]	Ground	44	43	I/O	I/O	44
45	Ground	AD[40]	46	45	I/O	I/O	46
47	AD[39]	AD[38]	48	47	I/O	I/O	48
49	AD[37]	Ground	50	49	I/O	I/O	50
51	Ground	AD[36]	52	51	I/O	I/O	52
53	AD[35]	AD[34]	54	53	I/O	I/O	54
55	AD[33]	Ground	56	55	I/O	I/O	56
57	V_IO	AD[32]	58	57	I/O	I/O	58
59	PCI-RSVD	PCI-RSVD	60	59	I/O	I/O	60
61	PCI-RSVD	Ground	62	61	I/O	I/O	62
63	Ground	PCI-RSVD	64	63	I/O	I/O	64