Figure C-10 (d) Port A Block Diagram (Pin PA
7
)
WPAD:
WPA:
RPA:
Write to PADDR
Write to port A
Read port A
PA
7
WPAD
Hardware
standby
Software standby
External bus released
Reset
PRA
WPA
Q
D
R
C
PA
7
DDR
Reset
Q
D
R
C
PA
7
DR
Internal address bus
Internal data bus
Bus controller
TPC
ITU
TPC output
enable
Next data
Output trigger
Output enable
Compare match
output
Input capture
Address
output
enable
844
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