PA
n
WPAD:
Write to PADDR
WPA:
Write to port A
RPA:
Read port A
n = 4 to 7
Note: PA
address output enable is fixed at 1 in mode 3.
7
Figure C-9 (c) Port A Block Diagram (Pins PA
670
Software standby
Address output enable
Mode 3
Reset
R
Q
D
PA
DDR
n
C
WPAD
Reset
R
Q
D
PA
DR
n
C
WPA
RPA
TPC
TPC output
enable
Next data
Output trigger
ITU
Output enable
Compare
match output
Input capture
input
to PA
)
4
7