Ide Interface Connectors - NEC POWERMATE V Service Manual

IDE INTERFACE CONNECTORS

All signal levels in the IDE interface are TTL compatible. A logic 1 is a signal whose
voltage level is between 2.0 and 5.0 V. A logic 0 is a signal measuring between 0.00 V and
0.70 V.
The two system board PCI/IDE connectors are physically identical. Electrically the primary
IDE connector uses IRQ14 and the secondary IDE connector uses IRQ15. Table A-12
provides the IDE pin assignments. All signals on the Host interface have the prefix HOST.
Table A-12 IDE Connector Pin Assignments
Pin Signal
01 HOST RESET
03 HOST DATA 7
05 HOST DATA 6
07 HOST DATA 5
09 HOST DATA 4
11 HOST DATA 3
13 HOST DATA 2
15 HOST DATA 1
17 HOST DATA 0
19 GND
21 DRQ3
23 HOST IOW
25 HOST IOR
27 IOCHRDY
29 DACK3
31* HOST IRQ14
33 HOST ADDR 1
35 HOST ADDR 0
37 HOST CSO
39 HOST SLV/ACT
*The secondary IDE connector uses IRQ15
Connector Pin Assignments
Pin Signal
02 GND
04 HOST DATA 8
06 HOST DATA 9
08 HOST DATA 10
10 HOST DATA 11
12 HOST DATA 12
14 HOST DATA 13
16 HOST DATA 14
18 HOST DATA 15
20 KEY
22 GND
24 GND
26 GND
28 HOST ALE
30 GND
32 HOST IO16
34 GND
36 HOST ADDR 2
38 HOST CS1
40 GND
A-9