HD6433045 datasheet(29/905 Pages) RENESAS

29 / 905 page

Section 1 Overview

Rev. 7.00 Sep 21, 2005 page 5 of 878

REJ09B0259-0700

Feature

Description

Serial

communication

interface (SCI),

2 channels

• Selection of asynchronous or synchronous mode

• Full duplex: can transmit and receive simultaneously

• On-chip baud-rate generator

• Smart card interface functions added (SCI0 only)

A/D converter

• Resolution: 10 bits

• Eight channels, with selection of single or scan mode

• Variable analog conversion voltage range

• Sample-and-hold function

• A/D conversion can be externally triggered

D/A converter

• Resolution: 8 bits

• Two channels

• D/A outputs can be sustained in software standby mode

I/O ports

• 70 input/output pins

• 8 input-only pins

• Seven MCU operating modes

Mode

Address Space

Address Pins

Initial Bus Width

Max. Bus Width

Mode 1

1 Mbyte

A19 to A0

8 bits

16 bits

Mode 2

1 Mbyte

A19 to A0

16 bits

Mode 3

16 Mbytes

A23 to A0

8 bits

16 bits

Mode 4

16 Mbytes

A23 to A0

16 bits

Mode 5

1 Mbyte

A19 to A0

8 bits

16 bits

Mode 6

16 Mbytes

A23 to A0

8 bits

16 bits

Mode 7

1 Mbyte

—

Operating

modes

•

On-chip ROM is disabled in modes 1 to 4

Power-down

state

• Sleep mode

• Software standby mode

• Hardware standby mode

• Module standby function

• Programmable system clock frequency division

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