H8SSLASH2224 datasheet(435/1071 Pages) RENESAS

435 / 1071 page

Section 10 I/O Ports

Rev. 5.00 Aug 08, 2006 page 349 of 982

REJ09B0054-0500

10.10.5 Pin Functions

Port E pins also function as data I/O pins. The values of register and pin functions are shown

below.

• PE7/D7, PE6/D6, PE5/D5, PE4/D4, PE3/D3, PE2/D2, PE1/D1, PE0/D0

The pin functions are switched as shown below according to the combination of the operating

mode, bus mode, and the PEnDDR bit.

Operating

mode

Modes 4 to 6

Mode 7

Bus mode

8-bit bus mode

16-bit bus

mode



PEnDDR



Pin functions

PEn input pin

PEn output

Data I/O pin

PEn input pin

PEn output

Note: n = 7 to 0

10.10.6 Input Pull-Up MOS States in Port E

Port E has a built-in input pull-up MOS function that can be controlled by software. Input pull-up

MOS can be used in modes 4 to 6 and 8-bit bus mode or in mode 7 and specified as on or off on an

individual bit basis.

Table 10.6 summarizes the input pull-up MOS states in port E.

Table 10.6 Input Pull-Up MOS States in Port E

Pin States

Power-on

Reset

Hardware

Standby

Mode

Manual

Reset

Software

Standby

Mode

In Other

Operations

Data I/O (16-bit bus in

modes 4 to 6) and port

output (8-bit bus in modes 4

to 6, and mode 7)

OFF

Port input (8-bit bus in

modes 4 to 6, and mode 7)

ON/OFF

Legend:

OFF:

Input pull-up MOS is always off.

ON/OFF: On when PEDDR = 0 and PEPCR = 1; otherwise off.

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