68HC705JB3 datasheet(19/134 Pages) FREESCALE

19 / 134 page

November 5, 1998

GENERAL RELEASE SPECIFICATION

MC68HC05JB3

GENERAL DESCRIPTION

MOTOROLA

REV 1

1-7

PA0 to PA3 has external interrupt function (mask option) with schmitt trigger input

circuit, and PA4 to PA7 has 8mA current sink capability.

Port A can also be conﬁgured as the optical interface.

1.4.8 PB0-PB2, PB3-PB7

These seven I/O lines comprise Port B. The state of any pin is software program-

mable and is conﬁgured as an input during power-on or reset.

PB1 and PB2 are open-drain I/O lines with pull-up devices. PB0 (shared with

TCAP) is a push-pull I/O line with pull-down device.

PB1 and PB2 are also slow transition outputs, each has 25mA current sink capa-

bility at VOL =0.5V.

PB4-PB7 I/O lines are push-pull pins with pull-down devices, and are only avail-

able in the 28-pin package.

1.4.9 PC0-PC3

These four I/O lines comprise Port C. The state of any pin is software programma-

ble and all Port C lines are conﬁgured as inputs during power-on or reset.

PC0 to PC3 are push-pull pins with pull-down devices. PC0 is also shared with the

OCMP pin from the output compare function of the 16-bit timer.

Port C is only available in the 28-pin package.

Freescale Semiconductor, Inc.

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68HC705JB3 Datasheet(PDF) 19 Page - Freescale Semiconductor, Inc