2 hard disk (ide) connector, 1) 40-pin hard disk (ide) connector (cn5), 2) 44-pin hard disk (ide) connector (cn7) – SMC Networks 486DX4 User Manual

Page 21

AR-B1462 User¡

¦s Guide

3-3

3.2.2 Hard Disk (IDE) Connector

(1) 40-Pin Hard Disk (IDE) Connector (CN5)

A 40-pin header type connector (CN5) is provided to interface with up to two embedded hard disk drives (IDE AT
bus). This interface, through a 40-pin cable, allows the user to connect up to two drives in a “daisy chain” fashion.
To enable or disable the hard disk controller, please use the BIOS Setup program. The following table illustrates
the pin assignments of the hard disk drive’ s 40-pin connector.

-IDERST 1

2 GROUND

D0 17

D7 3

D6 5

D1 15

D5 7

D4 9

D3 11

D2 13

GROUND 19

Not Used 21

-IOR 25

-IORDY 27

Not Used 29

-IOW 23

HDA1 33

-HDCS0 37

HDA0 35

-HDLED 39

IRQ 14 31

4 D8

16 D14

14 D13

12 D12

10 D11

8 D10

6 D9

28 Not Used

32 -IO16

30 GROUND

26 GROUND

24 GROUND

22 GROUND

20 Not Used

18 D15

34 Not Used

36 HDA2

38 -HDCS1

40 GROUND

CN5

Figure 3-3 CN5: Hard Disk (IDE) Connector

Caution: When the CN5 is used to connect the hard disk drive, if you find it can not make partition, please
change the hard disk cable to below 35cm in length.

(2) 44-Pin Hard Disk (IDE) Connector (CN7)

AR-B1462 also provides IDE interface 44-pin connector to connect with the hard disk device.