HD64F2145 datasheet(240/829 Pages) RENESAS

240 / 829 page

Rev. 2.0, 08/02, page 200 of 788

8.12.4

Pin Functions

• PB7/D7/:8(:*2, PB6/D6/:8(9*2, PB5/D5/:8(8*2, PB4/D4/:8(7*2

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

mode, the PBnDDR bit, and the ABW bit in WSCR.

Operating

Mode

Mode 1 and Modes 2, 3 (EXPE = 1)

Modes 2, 3 (EXPE = 0)

ABW

—

PBnDDR

—

PBn

input pin

PBn

output pin

PBn

input pin

PBn

output pin

Pin Function

I/O pin

:8(Q input pin*1

Notes: 1. Except when used as a data bus pin, this pin can always be used as the

:8(Q input

pin. (n = 7 to 4)

2. Not supported by the H8S/2148B.

• PB3/D3/:8(6*2/&67

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

mode, the HI12E and CS4E bits in SYSCR2, the ABW bit in WSCR, and the PB3DDR bit.

Operating

Mode

Mode 1 and Modes 2, 3 (EXPE = 1)

Modes 2, 3 (EXPE = 0)

HI12E

—

CS4E

—

Either cleared to 0

ABW

—

PB3DDR

—

PB3

input pin

PB3

output pin

PB3

input pin

PB3

output pin

&67

input pin

Pin Function

D3 I/O pin

:8(6 input pin*1

Notes: 1. Except when used as a data bus pin, this pin can always be used as the

:8(6 input

pin. The

&67 input pin can only be used in mode 2 or 3 (EXPE = 0).

2. Not supported by the H8S/2148B.

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