Figure C-11 (c) Port B Block Diagram (Pin PB
6
)
WPBD
Reset
Reset
Q
D
R
C
PB DDR
Q
D
R
C
PB DR
6
RPB
WPB
DMAC
DREQ0
input
TPC
Bus controller
WPBD:
WPB:
RPB:
Write to PBDDR
Write to port B
Read port B
TPC
output
enable
Next data
Output
trigger
Chip select
enable
CS
7
outpu
Internal data bus
6
PB
6
847
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