1127
C.6
Port A Block Diagram
R
PAnPCR
C
Q
D
Reset
Internal data bus
Internal address bus
WPCRA
Reset
WDRA
R
C
Q
D
PA0
RDRA
RODRA
RPORA
PAnDR
Reset
WDDRA
R
C
Q
D
PAnDDR
Reset
WODRA
RPCRA
R
C
Q
D
PAnODR
*
1
*
2
Mode4/5/6
Address
enable
Notes: 1. Output enable signal
2. Open drain control signal
WDDRA
WDRA
WODRA
WPCRA
RDRA
RPORA
RODRA
RPCRA
: Write to PADDR
: Write to PADR
: Write to PAODR
: Write to PAPCR
: Read PADR
: Read port A
: Read PAODR
: Read PAPCR
Legend
Figure C-6 (a) Port A Block Diagram (Pin PA0)