HD6473887 Datasheet, PDF (147/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

Section 8 I/O Ports
8.1 Overview
The H8/3887 Series is provided with eight 8-bit I/O ports, one 4-bit I/O port, one 3-bit I/O port,
one 8-bit input-only port, one 4-bit input-only port, and one 1-bit input-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 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, 9, and A are also used as liquid crystal display segment and common pins,
selectable in 8-bit units.
Block diagrams of each port are given in Appendix C, I/O Port Block Diagrams
Table 8-1 Port Functions
Port Description
Pins
Other Functions
Port 1 • 8-bit I/O port
P1₇ to P1₅/IRQ₃ to External interrupts 3 to 1
• MOS input pull-up option ^IRQ₁/TMIF, TMIC Timer event interrupts
TMIF, TMIC
P1₄/IRQ₄/ADTRG External interrupt 4 and A/D
converter external trigger
Function
Switching
Registers
PMR1
TCRF,
TMC
PMR1,
AMR
P1₃/TMIG
P1₂, P1₁/
TMOFH, TMOFL
Timer G input capture input PMR1
Timer F output compare output PMR1
Port 2 •
•
•
P1₀/TMOW
8-bit I/O port
P2₀/SCK₁
Open-drain output option P2₁/SI₁
Large-current port
P2₂/SO₁
P2₇ to P2₃
Timer A clock output
SCI1 data output (SO₁), data
input (SI₁), clock input/output
(SCK₁)
None
PMR1
PMR2
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