HD64F38024HV Datasheet, PDF (217/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 8 I/O Ports
Section 8 I/O Ports
8.1 Overview
The LSI is provided with five 8-bit I/O ports, two 4-bit I/O ports, one 3-bit I/O port, one 8-bit
input-only port, one 1-bit input-only port, and one 6-bit output-only port. Table 8.1 indicates the
functions of each port.
Each port has of a port control register (PCR) that controls input and output, and a port data
register (PDR) for storing output data. Input or output can be assigned to individual bits.
See section 2.9.2, Notes on Bit Manipulation, for information on executing bit-manipulation
instructions to write data in PCR or PDR.
Ports 5, 6, 7, 8, and A are also used as liquid crystal display segment and common pins, selectable
in 4-bit units.
Block diagrams of each port are given in Appendix C, I/O Port Block Diagrams.
Table 8.1 Port Functions
Port
Port 1
Port 3
Description
• 4-bit I/O port
• MOS input pull-up
option
Pins
P17/IRQ3/TMIF
P16^*1
P14/IRQ4/ADTRG
P13/TMIG
• 8-bit I/O port
P37/AEVL
• MOS input pull-up ^P36/AEVH
option
P35 to P33
• Large-current
port^*2
• MOS open drain
P32, TMOFH
P31, TMOFL
P30/UD
output selectable
(only P35)
Other Functions
Function
Switching
Registers
External interrupt 3, timer
event input pin TMIF
PMR1
TCRF
None
External interrupt 4, A/D
converter external trigger
PMR1
AMR
Timer G input capture
PMR1
PMR2
Asynchronous counter event PMR3
input pins AEVL, AEVH
ECCR
None
PMR2
Timer F output compare
output
PMR3
Timer C count up/down
selection input
PMR3
Rev. 8.00 Mar. 09, 2010 Page 195 of 658
REJ09B0042-0800