H8SLASH3021 datasheet(164/712 Pages) RENESAS

No. de pieza	H8/3021

Descripción Electrónicos	16-Bit Single-Chip Microcomputer

PDF	712 Pages

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Fabricante Electrónico	RENESAS [Renesas Technology Corp]

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7. I/O Ports

Rev.2.00 Mar. 22, 2007 Page 140 of 684

REJ09B0352-0200

7.3.3

Pin Functions in Each Mode

The pin functions of port 2 differ between mode 1, 3 (expanded mode with on-chip ROM

disabled), modes 5 and 6 (expanded mode with on-chip ROM enabled), and mode 7 (single-chip

mode). The pin functions in each mode are described followings.

Modes 1 and 3: Address output can be selected for each pin in port 2. Figure 7.6 shows the pin

functions in modes 1 and 3.

Port 2

(output)

A (output)

Figure 7.6 Pin Functions in Modes 1 and 3 (Port 2)

Modes 5 and 6: Address output or generic input can be selected for each pin in port 2. A pin

becomes an address output pin if the corresponding P2DDR bit is set to 1, and a generic input pin

if this bit is cleared to 0. Following a reset, all pins are input pins. To use a pin for address output,

its P2DDR bit must be set to 1. Figure 7.7 shows the pin functions in modes 5 and 6.

H8/3021 Datasheet(PDF) 164 Page - Renesas Technology Corp