IDE Hard Drive / CD-ROM Interfaces
IDE Hard Drive / CD-ROM Interfaces
One IDE interface is available to connect up to two hard disk or CD-ROM drives. Use CMOS
Setup to specify the drive parameters of the attached drives.
Warning!
Cable length must be 18" or less to maintain proper signal integrity. The grounds
in this connector should not be used to carry motor current.
Table 10: EIDE Hard Drive Connector Pinout
JS3
Pin
Signal
Name
EIDE
Signal Name
Function
JH/JJ
Pin
1A
HRST*
Host Reset
Reset signal from CPU
1
2A Ground Ground
Ground
2
3A
IDE7
DATA 7
Data bit 7
3
4A
HD8
DATA 8
Data bit 8
4
5A
HD6
DATA 6
Data bit 6
5
6A
HD9
DATA 9
Data bit 9
6
7A
HD5
DATA 5
Data bit 5
7
8A
HD10
DATA 10
Data bit 10
8
9A
HD4
DATA 4
Data bit 4
9
10A
HD11
DATA 11
Data bit 11
10
11A
HD3
DATA 3
Data bit 3
11
12A
HD12
DATA 12
Data bit 12
12
13A
HD2
DATA 2
Data bit 2
13
14A
HD13
DATA 13
Data bit 13
14
15A
HD1
DATA 1
Data bit 1
15
16A
HD14
DATA 14
Data bit 14
16
17A
HD0
DATA 0
Data bit 0
17
18A
HD15
DATA 15
Data bit 15
18
19A Ground Ground
Ground
19
20A NC
NC
No
connection
20
21A
NC
NC
No connection
21
22A Ground Ground
Ground
22
23A HWR*
HOST
IOW*
I/O
write
23
24A Ground Ground
Ground
24
25A HRD*
HOST
IOR*
I/O
read
25
26A Ground Ground
Ground
26
27A NC
NC
No
connection
27
28A HAEN
ALE
Address
latch
enable
28
29A NC
NC
No
connection
29
30A Ground Ground
Ground
30
31A HINT
HOST
IRQ14
IRQ14
31
32A
XI16*
HOST IOCS16*
Drive register enabled
32
33A
HA1
HOST ADDR1
Address bit 1
33
34A NC
NC
No
connection
34
35A
HA0
HOST ADDR0
Address bit 0
35
36A
HA2
HOST ADDR2
Address bit 2
36
37A HCS0* HOST
CS0*
Reg.
access chip select 0
37
38A HCS1* HOST
CS1*
Reg.
access chip select 1
38
39A
NC
NC
No connection
39
40A Ground Ground
Ground
40
28 – Reference
EPM-CPU-10 Reference Manual