H8S2245 datasheet(249/818 Pages) RENESAS

номер детали	H8S2245

подробное описание детали	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

PDF	818 Pages

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Section 8 I/O Ports

Rev.3.00 Mar. 26, 2007 Page 207 of 772

REJ09B0355-0300

Section 8 I/O Ports

8.1

Overview

The H8S/2245 Group has 11 I/O ports (ports 1, 2, 3, 5, and A to G), and one input-only port (port

4).

Table 8.1 summarizes the port functions. The pins of each port also have other functions.

Each port includes a data direction register (DDR) that controls input/output (not provided for the

input-only port), a data register (DR) that stores output data, and a port register (PORT) used to

read the pin states.

Ports A to E have a built-in MOS input pull-up function, and in addition to DR and DDR, have a

MOS input pull-up control register (PCR) to control the on/off state of MOS input pull-up.

Ports 3 and A include an open-drain control register (ODR) that controls the on/off state of the

output buffer PMOS.

Ports 1 and A to F can drive a single TTL load and 90-pF capacitive load, and ports 2, 3, 5, and G

can drive a single TTL load and 30-pF capacitive load. All the I/O ports can drive a Darlington

transistor when in output mode. Ports 1, and A to C can drive an LED (10-mA sink current).

Port 2 and the interrupt input pins (

IRQ0 to IRQ7) are Schmitt-triggered inputs.

H8S2245 датащи(PDF) 249 Page - Renesas Technology Corp