Datasheet

Appendix C I/O Port Block Diagrams
Rev.6.00 Sep. 27, 2007 Page 1242 of 1268
REJ09B0220-0600
R
PAnPCR
C
QD
Reset
WPCRA
Reset
WDRA
R
C
QD
PA
n
RDRA
RODRA
RPORA
Internal address bus
PAnDR
WDDRA
C
QD
PAnDDR
Reset
WODRA
RPCRA
R
C
QD
PAnODR
*1
*2
Modes 4 to 6
Mode 7
Mode 7
IRQ
n
interrupt
input
Reset
R
Legend:
WDDRA: Write to PADDR
WDRA: Write to PADR
WODRA: Write to PAODR
WPCRA: Write to PAPCR
RDRA: Read PADR
RPORA: Read port A
RODRA: Read PAODR
RPCRA: Read PAPCR
A
mE: Address output enable
IRQPAS: IRQ port switching select
Internal data bus
IRQPAS
AmE
Modes 4 to 7
Notes: n = 5 to 7
m = 21 to 23
1. Output enable signal
2. Open drain control signal
Figure C.7 (c) Port A Block Diagram (Pins PA
5
to PA
7
)