HD6432138SW datasheet(266/1061 Pages) RENESAS

Part #	HD6432138SW

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

PDF	1061 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 8 I/O Ports

Rev. 4.00 Jun 06, 2006 page 212 of 1004

REJ09B0301-0400

8.4.4

MOS Input Pull-Up Function

Port 3 has an on-chip MOS input pull-up function that can be controlled by software. This MOS

input pull-up function can be used in modes 2 and 3 (when EXPE = 0), and can be specified as on

or off on a bit-by-bit basis.

When a P3DDR bit is cleared to 0 in mode 2 or 3 (when EXPE = 0), setting the corresponding

P3PCR bit to 1 turns on the MOS input pull-up for that pin.

The MOS input pull-up function is in the off state after a reset and in hardware standby mode. The

prior state is retained in software standby mode.

Table 8.8 summarizes the MOS input pull-up states.

Table 8.8

MOS Input Pull-Up States (Port 3)

Mode

Reset

Hardware

Standby Mode

Software

Standby Mode

In Other

Operations

1, 2, 3 (EXPE = 1)

Off

2, 3 (EXPE = 0)

Off

On/Off

Legend:

Off:

MOS input pull-up is always off.

On/Off: On when P3DDR = 0 and P3PCR = 1; otherwise off.

HD6432138SW Datasheet(PDF) 266 Page - Renesas Technology Corp