HD6432351 datasheet(406/1025 Pages) RENESAS

Part #	HD6432351

Description	16-Bit Single-Chip Microcomputer

PDF	1025 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

Logo

406 / 1025 page

Section 9 I/O Ports

Rev. 3.00 Sep 15, 2006 page 372 of 988

REJ09B0330-0300

Modes 4 and 5

In modes 4 and 5, the lower 5 bits of port A are designated as address outputs automatically, while

the upper 3 bits function as address outputs or input ports and interrupt input pins. Input or output

can be specified individually for the upper 3 bits. Setting one of bits PA7DDR to PA5DDR to 1

makes the corresponding port A pin an address output, while clearing the bit to 0 makes the pin an

input port.

Port A pin functions in modes 4 and 5 are shown in figure 9.9.

A23 (output)

A22 (output)

A21 (output)

A20 (output)

A19 (output)

A18 (output)

A17 (output)

A16 (output)

PA7 (input)/IRQ7 (input)

PA6 (input)/IRQ6 (input)

PA5 (input)/IRQ5 (input)

A20 (output)

A19 (output)

A18 (output)

A17 (output)

A16 (output)

When PADDR = 1

When PADDR = 0

Port A

Figure 9.9 Port A Pin Functions (Modes 4 and 5)

HD6432351 Datasheet(PDF) 406 Page - Renesas Technology Corp