主板
PCI总线:
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 |
IRDY # |
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 |
注:1、“#”表低电平有效。2、Reserved为保留线。3、Ground为地。4、AD线为数据地址复合线。
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