Open Access
Circuit Descriptions
3-16
ARM Development Board (ARM7TDMI Version)
Hardware Reference Guide
ARM DUI 0017C
Pin Function Direction Pin Function Direction
1 STROBE i/o 14 AUTOFD i/o
2 DATA[0] i/o 15 ERROR in
3 DATA[1] i/o 16 INIT i/o
4 DATA[2] i/o 17 SLCTIN i/o
5 DATA[3] i/o 18 GND power
6 DATA[4] i/o 19 GND power
7 DATA[5] i/o 20 GND power
8 DATA[6] i/o 21 GND power
9 DATA[7] i/o 22 GND power
10 ACK in 23 GND power
11 BUSY in 24 GND power
12 PE in 25 GND power
13 SLCT in
Table 3-9: Parallel port pinout
Additional features
Some additional features have been added to the
board to allow the parallel port to drive some LEDs
and read switches.
DIP switch (S3) connects to bits 0-3 of the parallel
port when the four lower bits of the link field (LK11)
are jumpered.
Similarly the four yellow LEDs marked PP0–3 are
connected to bits 4–7 of the parallel port when the
upper four bits of the link field (LK11) are jumpered.
This information is summarized in
Table 3-10: LED’s
and read switches
t:
Position Bit Connects to
1-2 0 S3 switch 1
3-4 1 S3 switch 2
5-6 2 S3 switch 3
7-8 3 S3 switch 4
9-10 4 LED PP0
11-12 5 LED PP1
13-14 6 LED PP2
15-16 7 LED PP3
Table 3-10: LED’s and read switches
hrg.book Page 16 Wednesday, July 22, 1998 9:18 AM
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