Figure C-10 (b) Port A Block Diagram (Pins PA
2
, PA
3
)
WPAD:
WPA:
RPA:
n = 2 and 3
Write to PADDR
Write to port A
Read port A
PA
n
RPA
WPA
WPAD
Reset
Q
D
R
C
PA DDR
n
Reset
Q
D
R
C
PA DR
n
Internal data bus
TPC
output
enable
TPC
Next
data
Output
trigger
Output
enable
Compare
match
output
Input
capture
Counter
clock
input
ITU
842
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