HD6432142 datasheet(603/1177 Pages) RENESAS

Part #	HD6432142

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

PDF	1177 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 17 Keyboard Buffer Controller

Rev. 4.00 Sep 27, 2006 page 559 of 1130

REJ09B0327-0400

Section 17 Keyboard Buffer Controller

Provided in the H8S/2148 Group and H8S/2147N; not provided in the H8S/2144 Group.

17.1

Overview

The H8S/2148 Group and H8S/2147N have three on-chip keyboard buffer controller channels,

designated 0, 1, and 2. The keyboard buffer controller is provided with functions conforming to

the PS/2 interface specifications.

Data transfer using the keyboard buffer controller employs a data line (KD) and a clock line,

providing economical use of connectors, board surface area, etc. Figure 17.1 shows how the

keyboard buffer controller is connected.

17.1.1

Features

• Conforms to PS/2 interface specifications

• Direct bus drive (via the KCLK and KD pins)

• Interrupt sources: on completion of data reception and on detection of clock edge

• Error detection: parity error and stop bit monitoring

HD6432142 Datasheet(PDF) 603 Page - Renesas Technology Corp