HD64F2145 datasheet(242/829 Pages) RENESAS

242 / 829 page

Rev. 2.0, 08/02, page 202 of 788

• PB0/D0/:8(3/HIRQ3//60,*4

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

mode, the HI12E and CS3E bits in SYSCR2, the LSMIE bits in HICR0 of host interface

(LPC), the ABW bit in WSCR, and the PB0DDR bit.

Operating

Mode

Modes 1, 2, 3 (EXPE = 1)

Mode 2, 3 (EXPE = 0)

LSMIE

HI12E

—

CS3E

—

Either cleared to 0

1—

ABW

—

PB0DDR

—

PB0

input pin

PB0 output

HIRQ3

output pin

/60,*4

output pin

PB0

input pin

PB0 output

/60, input pin*2

Function

D0 I/O pin

:8(3 input pin*2

Notes: 1. When bit LSMIE is set to 1 in HICR0, bits HI12E and PB0DDR should be cleared to 0.

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

:8(3 input

pin. The HIRQ3 output pin and

/60, I/O pin can only be used in mode 2 or 3 (EXPE =

0).

In mode 1, 2, 3 (EXPE = 1), clear the LSMIE bit to 0.

Not supported by the H8S/2148B.

8.12.5

Port B Input Pull-Up MOS

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

pull-up MOS function can be specified as on or off on a bit-by-bit basis.

When a pin is designated as an on-chip peripheral module output pin, the input pull-up MOS is

always off.

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