18
3.12 Floppy Disk Drive Connector (CN8)
The WAFER-4826EV board is equipped with a 34-pin daisy-chain drive connector
cable which supports up to two floppy drives. The detailed pin assignments of the
connector is described as below:
2
34
1
33
PIN DESCRIPTION PIN DESCRIPTION
1 GND 2
REDUCE
WRITE
3 GND 4
NC
5 GND 6
NC
7 NC 8
INDEX#
9
GND
10 MOTOR ENABLE A#
11
GND
12 DRIVE SELECT B#
13
NC
14 DRIVE SELECT A#
15
GND
16 MOTOR ENABLE B#
17 GND 18
DIRECTION#
19 GND 20
STEP#
21 GND 22
WRITE
DATA#
23
GND
24 WRITE GATE#
25 GND 26
TRACK
0#
27 GND 28
WRITE
PROTECT#
29 NC 30
READ
DATA#
31
GND
32 SIDE 1 SELECT#
33 NC 34
DISK
CHANGE#
3.13 External Power Connector (CN1)
The WAFER-4826EV has an on-board external power connector CN1. The
WAFER-4826EV is only powered by VCC (5V), which is conducted through pin 4 of
the external power connector CN1, and power GND from pin 2 and pin 3. The
extra power 12V provided by CN1 will be passed to CN5 and CN6 for
PC104 slot use only.
CN1: External Power Connector
1 2 3 4
PIN DESCRIPTION
1 +12V
2 GND
3 GND
4 +5V
