HD64F2149YV datasheet(290/1075 Pages) RENESAS

290 / 1075 page

Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 262 of 1044

REJ09B0280-0300

Selection Method and Pin Functions

PB3/D3/

WUE3/

CS4

The pin function is switched as shown below according to the combination of

the operating mode, bits HI12E and CS4E in SYSCR2, bit ABW in WSCR, and

bit PB3DDR.

Operating

mode

Mode 1,

modes 2 and 3 (EXPE = 1)

Modes 2, 3

(EXPE = 0)

HI12E

—

Either cleared to 0

CS4E

—

ABW

——

PB3DDR

—

010

—

Pin function

I/O pin

PB3

input pin

PB3

output pin

PB3

input pin

PB3

output pin

CS4

input pin

WUE3 input pin

Except when used as a data bus pin, this pin can always be used as the

WUE3 input pin.

The

CS4 input pin can only be used in mode 2 or 3 (EXPE = 0).

PB2/D2/

WUE2/

CS3

The pin function is switched as shown below according to the combination of

the operating mode, bits HI12E and CS3E in SYSCR2, bit ABW in WSCR, and

bit PB2DDR.

Operating

mode

Mode 1,

modes 2 and 3 (EXPE = 1)

Modes 2, 3

(EXPE = 0)

HI12E

—

Either cleared to 0

CS3E

—

ABW

——

PB2DDR

—

010

—

Pin function

I/O pin

PB2

input pin

PB2

output pin

PB2

input pin

PB2

output pin

CS3

input pin

WUE2 input pin

Except when used as a data bus pin, this pin can always be used as the

WUE2 input pin.

The

CS3 input pin can only be used in mode 2 or 3 (EXPE = 0).

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