HD6433644R datasheet(23/549 Pages) RENESAS

23 / 549 page

Section 1 Overview

Rev. 6.00 Sep 12, 2006 page 3 of 526

REJ09B0326-0600

Item

Description

Power-down

modes

Seven power-down modes

• Sleep (high-speed) mode

• Sleep (medium-speed) mode

• Standby mode

• Watch mode

• Subsleep mode

• Subactive mode

• Active (medium-speed) mode

Memory

Large on-chip memory

• H8/3644: 32-kbyte ROM, 1-kbyte RAM

• H8/3643: 24-kbyte ROM, 1-kbyte RAM

• H8/3642: 16-kbyte ROM, 512 byte RAM (1-kbyte RAM F-ZTAT version)

• H8/3641: 12-kbyte ROM, 512 byte RAM

• H8/3640: 8-kbyte ROM, 512 byte RAM

I/O ports

53 pins

• 45 I/O pins

• 8 input pins

Timers

Five on-chip timers

• Timer A: 8-bit timer

Count-up timer with selection of eight internal clock signals divided from the

system clock (

φ)*

2 and four clock signals divided from the watch clock

(

φ w)*

• Timer B1: 8-bit timer

 Count-up timer with selection of seven internal clock signals or event

input from external pin

 Auto-reloading

• Timer V: 8-bit timer

 Count-up timer with selection of six internal clock signals or event input

from external pin

 Compare-match waveform output

 Externally triggerable

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