Appendix C I/O Port Block Diagrams
C.1
Block Diagrams of Port 1
V
CC
P1
n
PDR1:
Port data register 1
PCR1:
Port control register 1
PMR1:
Port mode register 1
PUCR1:
Port pull-up control register 1
n = 7 and 4
m = 4 and 3
Figure C.1(a) Port 1 Block Diagram (Pins P1
Rev. 6.00, 08/04, page 596 of 628
V
CC
V
SS
SBY (low level during
reset and in standby
mode)
PUCR1
n
PMR1
n
PDR1
n
PCR1
n
and P1
)
7
4
IRQ
m