H8SLASH3028F datasheet(277/923 Pages) RENESAS

部件名	H8/3028F

功能描述	Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

PDF	923 Pages

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

标志

277 / 923 page

Rev. 2.00, 09/03, page 247 of 890

Section 8 I/O Ports

8.1

Overview

The H8/3028 Group has 11 input/output ports (ports 1, 2, 3, 4, 5, 6, 7, 8, 9, A, and B). Table 8.1

summarizes the port functions. The pins in each port are multiplexed as shown in table 8.1.

Each port has a data direction register (DDR) for selecting input or output, and a data register

(DR) for storing output data. In addition to these registers, ports 2, 4, and 5 have an input pull-up

control register (PCR) for switching input pull-up transistors on and off.

Ports 1 to 6 and port 8 can drive one TTL load and a 90-pF capacitive load. Ports 9, A, and B can

drive one TTL load and a 30-pF capacitive load. Ports 1 to 6 and 8 to B can drive a darlington

pair. Ports 1, 2, and 5 can drive LEDs (with 10-mA current sink). Pins P82 to P80, PA7 to PA0 have

Schmitt-trigger input circuits.

For block diagrams of the ports see appendix C, I/O Port Block Diagrams.

H8/3028F 数据表(PDF) 277 Page - Renesas Technology Corp