HD64F2357F20V Datasheet, PDF (331/1049 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-chip Microcomputer H8S Family / H8S/2300 Series

9.8 Port A
9.8.1 Overview
Port A is an 8-bit I/O port. Port A pins also function as address bus outputs and interrupt input pins (IRQ4 to IRQ7). The
pin functions change according to the operating mode.
Port A has a on-chip MOS input pull-up function that can be controlled by software. Pins PA₇ to PA₄ are schmitt-triggered
inputs.
Figure 9-7 shows the port A pin configuration.
Port A
Port A pins
PA₇/A₂₃/IRQ7
PA₆/A₂₂/IRQ6
PA₅/A₂₁/IRQ5
PA₄/A₂₀/IRQ4
PA₃/A₁₉
PA₂/A₁₈
PA₁/A₁₇
PA₀/A₁₆
Pin functions in mode 7*
PA₇ (I/O)/IRQ7 (input)
PA₆ (I/O)/IRQ6 (input)
PA₅ (I/O)/IRQ5 (input)
PA₄ (I/O)/IRQ4 (input)
PA₃ (I/O)
PA₂ (I/O)
PA₁ (I/O)
PA₀ (I/O)
Pin functions in mode 6*
Pin functions in modes 4 and 5
PA₇ (input)/A₂₃ (output)/IRQ7 (input)
PA₆ (input)/A₂₂ (output)/IRQ6 (input)
PA₅ (input)/A₂₁ (output)/IRQ5 (input)
PA₄ (input)/A₂₀ (output)/IRQ4 (input)
PA₃ (input)/A₁₉ (output)
PA₂ (input)/A₁₈ (output)
PA₁ (input)/A₁₇ (output)
PA₀ (input)/A₁₆ (output)
PA₇ (input)/A₂₃(output)/IRQ7 (input)
PA₆ (input)/A₂₂(output)/IRQ6 (input)
PA₅ (input)/A₂₁ (output)/IRQ5 (input)
A₂₀ (output)
A₁₉ (output)
A₁₈ (output)
A₁₇ (output)
A₁₆ (output)
Note: * Modes 6 and 7 are provided in the on-chip ROM version only.
Figure 9-7 Port A Pin Functions
Rev.6.00 Oct.28.2004 page 301 of 1016
REJ09B0138-0600H