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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 2m
m 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 sim
p
le 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