Figure C-8 (b) Port 8 Block Diagram (Pins P8
1
, P8
2
, P8
3
)
P8
n
WP8
Reset
Q
D
R
C
P8 DDR
n
WP8
Reset
Q
D
R
C
P8 DR
n
RP8
WP8D
WP8:
RP8:
n = 1 to 3
Write to P8DDR
Write to port 8
Read port 8
Internal data bus
Bus controller
output
Interrupt
controller
IRQ
IRQ
IRQ
CS
CS
CS
1
2
3
1
2
3
input
Mode 7
Mode 1 to 6
835
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