System information

Interfaces and Connectors
EPM-15 Reference Manual 28
IDE Hard Drive / CD-ROM Interfaces
The IDE interface is available to connect up to two IDE devices, such as hard disks, CD-ROM
drives, or CompactFlash. Connector J7 is the primary IDE controller with a 44-pin 2 mm latching
connector. Use CMOS setup to specify the drive parameters of the drive. If you use the on-board
CompactFlash device, only one other IDE device can be connected to the IDE controller.
Cable length must be 18" or less to maintain proper signal integrity.
This interface supplies power to 2.5" IDE drives. If you are connecting a 3.5" drive to the
interface (using the CBR-4405 44-pin to 40-pin IDE adapter), you must supply external power to
the drive. The power cable attached to a 3.5" drive must be properly grounded so that motor
current is not returned via the grounds in the data cable.
Table 5: J7 IDE Hard Drive Connector Pinout
Pin Signal Name Function Pin Signal Name Function
1 Reset- Reset signal from CPU 23 DIOW I/O write
2 Ground Ground 24 Ground Ground
3 DD7 Data bus bit 7 25 DIOR I/O read
4 DD8 Data bus bit 8 26 Ground Ground
5 DD6 Data bus bit 6 27 IORDY I/O ready
6 DD9 Data bus bit 9 28 CSEL Cable select
7 DD5 Data bus bit 5 29 DMACK- DMA acknowledge
8 DD10 Data bus bit 10 30 Ground Ground
9 DD4 Data bus bit 4 31 INTRQ Interrupt request
10 DD11 Data bus bit 11 32 NC No connection
11 DD3 Data bus bit 3 33 DA1 Device address bit 1
12 DD12 Data bus bit 12 34 CBLID- Cable type identifier
13 DD2 Data bus bit 2 35 DA0 Device address bit 0
14 DD13 Data bus bit 13 36 DA2 Device address bit 2
15 DD1 Data bus bit 1 37 CS0 Chip select 0
16 DD14 Data bus bit 14 38 CS1 Chip select 1
17 DD0 Data bus bit 0 39 DASP- LED
18 DD15 Data bus bit 15 40 Ground Ground
19 Ground Ground 41 Power +5.0 V
20 NC Key 42 Power +5.0 V
21 PDMARQ DMA request 43 Ground Ground
22 Ground Ground 44 NC No connection