Appendix C I/O Port Block Diagrams; Block Diagrams Of Port 1 - Hitachi H8/3937 Series Hardware Manual

Appendix C I/O Port Block Diagrams

C.1

Block Diagrams of Port 1

V
V
CC
P1
n
V
SS
PDR1: Port data register 1
PCR1: Port control register 1
PMR1: Port mode register 1
PUCR1: Port pull-up control register 1
n = 7 to 4
Figure C-1 (a) Port 1 Block Diagram (Pins P1
478
CC
SBY
(low level
during reset
and in standby
mode)
PUCR1
PMR1
PDR1
PCR1
7
n
n
n
n
IRQ
to P1 )
4
n–4