PCI总线接口定义图
为32位总线，且可扩展为64位，有124个脚（实际上去掉4个定位卡有120引脚），AD线有32条，工作频率为33MHZ/66MHZ，最大传输速率133MB/S。总线宽度32位(5V) 64位 3.3V。
ＰＣＩ总线（３２位）底视图
|
名称
|
信号名称
|
信号名称
| ||||||
|
Pin
|
Side A1
|
R
|
Side A2
|
R
|
Side B1
|
R
|
Side B2
|
R
|
|
1
|
TRST#
|
352
|
+12V
|
535
|
-12V
|
∞
|
TCK
|
0
|
|
2
|
TMS
|
∞
|
TD1
|
350
|
Ground
|
0
|
TDO
|
∞
|
|
3
|
+5V
|
352
|
INTA# |
526
|
+5V
|
351
|
+5V
|
350
|
|
4
|
INTC# |
528
|
+5V
|
350
|
INTB# |
526
|
INTD # |
526
|
|
5
|
Reserved
|
543
|
+5V
|
351
|
PRSNT1 #
|
∞
|
Reserved
|
∞
|
|
6
|
Reserved
|
∞
|
Ground
|
0
|
PRSNT2 #
|
∞
|
Ground
|
0
|
|
7
|
Ground
|
0
|
Reserved
|
∞
|
Ground
|
0
|
Reserved
|
∞
|
|
8
|
Reset# |
477
|
+5V
|
351
|
Ground
|
0
|
CLK |
734
|
|
9
|
GNT# |
500
|
Ground
|
0
|
Ground
|
0
|
REQ # |
473
|
|
10
|
Reserved
|
1955
|
AD(30)
|
477
|
+5V
|
350
|
AD(31)
|
477
|
|
11
|
+3.3V
|
∞
|
AD(28)
|
477
|
AD(29)
|
477
|
Ground
|
0
|
|
12
|
AD(26)
|
477
|
Ground
|
0
|
AD(27
|
477
|
AD(25)
|
477
|
|
13
|
AD(24)
|
476
|
IDSEL |
593
|
+3.3V
|
∞
|
C/BE #(3)
|
486
|
|
14
|
+3.3V
|
∞
|
AD(22)
|
477
|
AD(23)
|
477
|
Ground
|
0
|
|
15
|
AD(20)
|
477
|
Ground
|
0
|
AD(21)
|
477
|
AD(19)
|
477
|
|
16
|
AD(18)
|
460
|
AD(16)
|
477
|
+3.3V
|
∞
|
AD(17)
|
477
|
|
17
|
+3.3V
|
∞
|
FRAME#
|
477
|
C/BE #(2)
|
484
|
Ground
|
0
|
|
18
|
Ground
|
0
|
TRDY # |
477
|
ITRDY #
|
477
|
TRDY #
|
∞
|
|
19
|
Ground
|
0
|
STOP #
|
477
|
DEVSEL #
|
484
|
Ground
|
0
|
|
20
|
+3.3V
|
∞
|
SDONE
|
1669
|
LOCK #
|
497
|
PERR #
|
1666
|
|
21
|
SBO # |
1667
|
Ground
|
0
|
+3.3V
|
∞
|
SERR # |
472
|
|
22
|
PAR
|
476
|
AD(15)
|
477
|
+3.3V
|
∞
|
C/BE #(1)
|
485
|
|
23
|
+3.3V
|
∞
|
AD(13)
|
477
|
AD(14)
|
477
|
Ground
|
0
|
|
24
|
AD(11)
|
477
|
Ground
|
0
|
AD(12)
|
477
|
AD(10)
|
477
|
|
25
|
AD(09)
|
477
|
定位卡
|
|
Ground
|
0
|
定位卡
|
|
|
26
|
定位卡
|
|
C/BE #(0)
|
485
|
定位卡
|
|
AD(08)
|
477
|
|
27
|
+3.3V
|
∞
|
AD(06)
|
477
|
AD(07)
|
477
|
+3.3V
|
∞
|
|
28
|
AD(04)
|
477
|
Ground
|
0
|
AD(O5)
|
477
|
AD(03)
|
477
|
|
29
|
AD(02)
|
477
|
AD(00)
|
477
|
Ground
|
0
|
AD(01)
|
477
|
|
30
|
+5V
|
350
|
REQ 64#
|
1880
|
+5V
|
350
|
ACK 64#
|
∞
|
|
31
|
+5V
|
351
|
+5V
|
352
|
+5V
|
350
|
+5V
|
350
|