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Appendix C I/O Port Block Diagrams
Appendix C I/O Port Block Diagrams
C.1
Block Diagram of Port 1
SBY (low level during reset and in standby mode)
V
CC
V
CC
P1
n
V
SS
Legend:
PDR1:
Port data register 1
PCR1:
Port control register 1
PMR1:
Port mode register 1
PUCR1:
Port pull-up control register 1
Notes: n = 7, 6*, or 5
* P1
, the timer C module (TMIC), and n = 6 (PDR1
6
of the H8/3857 Group only, and are not provided in the H8/3854 Group.
(Pins P1
Rev.3.00 Jul. 19, 2007 page 508 of 532
REJ09B0397-0300
Figure C.1 (a) Port 1 Block Diagram
to P1
: H8/3857 Group, Pins P1
7
5
*
PUCR1
n
*
PMR1
n
*
PDR1
n
*
PCR1
n
, PCR1
, PMR1
, PUCR1
6
6
6
, P1
: H8/3854 Group)
7
5
Internal
data bus
IRQ
*
n – 4
Timer B module
TMIB (P1
)
5
Timer C module
) *
TMIC (P1
6
Timer F module
TMIF (P1
)
7
, IRQ
) are functions
6
2
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