68HC05JB4 Datasheet, PDF (19/134 Pages) Freescale Semiconductor, Inc – 68HC05JB4

Freescale Semiconductor, Inc.
February 24, 1999 GENERAL RELEASE SPECIFICATION
1.4.8 PB0-PB4
These five I/O lines comprise Port-B. PB0 to PB4 are push-pull pins with internal
pull-up resistors. The state of any pin is software programmable and all Port B
lines are configured as inputs during power-on or reset. The internal pull-up resis-
tor is software enable. In addition, all Port-B pins have Slow Falling Edge Control
which is enabled by software. PB0 can be used as the input capture pin when the
input capture function is enabled on the 16-bit Timer. PB0 has built-in schmitt trig-
gered input. When the ADC function is enabled, PB3 and PB4 can be used as
extra two analog input channels (AD4 and AD5 respectively) to the ADC.
1.4.9 PC0-PC5
These six I/O lines comprise Port-C. PC0 to PC5 are push-pull pins. The state of
any pin is software programmable and all Port C lines are configured as inputs
during power-on or reset. When the ADC function is enabled, PC0 thru PC3
become the four analog input channels to the ADC and PC4 and PC5 become the
analog “High” and “Low” reference voltages to the ADC respectively.
MC68HC05JB4
REV 2
GENERAL DESCRIPTION
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MOTOROLA
1-7