IDE Hard Drive / CompactFlash / CD-ROM Interface
Reference – 28
EPM-4 Reference Manual
IDE Hard Drive / CompactFlash / CD-ROM Interface
One IDE interface is available to connect up to two IDE devices, such as hard disks, CD-ROM
drives or CompactFlash (CF) media. Use CMOS Setup to specify the drive parameters of the
attached drives.
An activity indication LED is provided on the EPM-4. The yellow LED of D5 (See page 22) will
show that activity is detected on the IDE interface.
A 2mm 44-pin connector (J6) and a CF socket (J5) are provide on the board. Jumper V3
determines if the CF media plugged into J5 is the IDE Master or slave (see Table 2).
Note:
The IDE port is a simple interface compatible with PIO mode 0.
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 4: IDE Hard Drive Connector Pinout
J6
Pin
Signal
Name
IDE
Signal Name
Function
1
HRST*
Host Reset
Reset signal from CPU
2 Ground Ground
Ground
3
IDE7
DATA 7
Data bit 7
4
ID8
DATA 8
Data bit 8
5
ID6
DATA 6
Data bit 6
6
ID9
DATA 9
Data bit 9
7
ID5
DATA 5
Data bit 5
8
ID10
DATA 10
Data bit 10
9
ID4
DATA 4
Data bit 4
10
ID11
DATA 11
Data bit 11
11
ID3
DATA 3
Data bit 3
12
ID12
DATA 12
Data bit 12
13
ID2
DATA 2
Data bit 2
14
ID13
DATA 13
Data bit 13
15
ID1
DATA 1
Data bit 1
16
ID14
DATA 14
Data bit 14
17
ID0
DATA 0
Data bit 0
18
ID15
DATA 15
Data bit 15
19 Ground Ground
Ground
20 NC
NC
No
connection
21 IDEDRQ IDEDRQ
DMA/Request
22 Ground Ground
Ground
23
IOWR*
HOST IOW*
I/O write
24 Ground Ground
Ground
25
IORD*
HOST IOR*
I/O read
26 Ground Ground
Ground
27 RDY
Ready
Wait
control
28
HAEN
ALE
Address latch enable
29 IDEDACK
IDEACK DMA/Ack.
30 Ground Ground
Ground
31 HINT
HOST
IRQ10 IRQ10
32
XI16*
HOST IOCS16*
Drive register enabled
33
PA1
HOST ADDR1
Address bit 1
34 NC
NC
No
connection
35
PA0
HOST ADDR0
Address bit 0
36
PA2
HOST ADDR2
Address bit 2
37
ECS0*
HOST CS0*
Reg. Access chip select 0
38
ECS1*
HOST CS1*
Reg. Access chip select 1
39
NC
NC
No connection
40 Ground Ground
Ground
41 5V
Power
Power
42 5V
Power
Power
43 Ground Ground
Ground
44 NC
NC
No
connection
Summary of Contents for EPM-4
Page 2: ...EPM 4 AMD ÉlanSC520 processor module with 10 100 Ethernet and PC 104 Plus interface MEPM4 ...
Page 5: ......
Page 8: ...Table of Contents v Appendix B References 45 ...
Page 11: ...EPM 4 Block Diagram EPM 4 Reference Manual Introduction 3 EPM 4 Block Diagram ...
Page 14: ......
Page 24: ......
Page 50: ......
