PCI总线接口界说图
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，作业频率为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
|
称号 |
信号称号 |
信号称号 |
||||||
|
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 |
