MC68HC705C9A_1 Datasheet, PDF (30/157 Pages) Freescale Semiconductor, Inc – General Release Specification

Freescale Semiconductor, Inc.
General Release Specification _{Functional Pin Descriptions}
trigger as part of its input to improve noise immunity. Refer to Section 4.
Interrupts for more detail.
1.7.4 OSC1 andOSC2
These pins provide control input for an on-chip clock oscillator circuit. A
crystal connected to these pins provides a system clock. The internal
frequency is one-half the crystal frequency.
1.7.5 RESET
As an input pin, this active low RESET pin is used to reset the MCU to a
known startup state by pulling RESET low. As an output pin, when in
MC68HC05C9A mode only, the RESET pin indicates that an internal
MCU reset has occurred. The RESET pin contains an internal Schmitt
trigger as part of its input to improve noise immunity. Refer to Section 5.
Resets for more detail.
1.7.6 TCAP
This pin controls the input capture feature for the on-chip programmable
timer. The TCAP pin contains an internal Schmitt trigger as part of its
input to improve noise immunity. Refer to Section 8. Capture/Compare
Timer for more detail.
1.7.7 TCMP
The TCMP pin provides an output for the output compare feature of the
on-chip programmable timer. Refer to Section 8. Capture/Compare
Timer for more detail.
1.7.8 PA0–PA7
These eight I/O lines comprise port A. The state of each pin is software
programmable and all port A pins are configured as inputs during reset.
Refer to Section 7. Input/Output Ports for more detail.
MC68HC705C9A — Rev. 2.0
General Description
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