MC68HC05F8 Datasheet, PDF (23/126 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor(HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
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PIN DESCRIPTIONS
This section provides a description of the functional pins and I/O programming of the
MC68HC05F8/MC68HC705F8 microcontroller.
2.1
Functional Pin Descriptions
PIN NAME
VDD, VSS
IRQ1
IRQ2
RESET
TCAP
TCMP
OSC1, OSC2
PA0-PA7
PB0-PB7
PC0-PC7
56-pin SDIP
PIN No.
53, 52
64-pin QFP
PIN No.
52, 51
10
2
9
1
34
49
48
33, 32
30
48
47
29, 28
(PA4-PA7 only)
14-11
10-3
22-15
18-11
5-1, 56-54
60-53
DESCRIPTION
Power is supplied to the MCU using these two pins. VDD is power and
VSS is ground.
IRQ1 and IRQ2 are software programmable to provide two choices of
interrupt triggering sensitivity. These options are:
1) negative edge-sensitive triggering only, or
2) both negative edge-sensitive and level sensitive triggering.
The active low RESET input is not required for start-up, but can be
used to reset the MCU internal state and provide an orderly software
start-up procedure.
The TCAP input controls the input capture feature for the on-chip
programmable free-running timer.
The TCMP pin provides an output for the output compare feature of
the on-chip programmable free-running timer.
These pins provide connections to the on-chip oscillator. The crystal
frequency is 3.579545MHz. OSC1 may be driven by an external
oscillator if an external crystal circuit is not used.
These eight I/O lines comprise port A.The state of any pin is software
programmable. All port A lines are configured as input during power
on or external reset. Port A can also be programmed as keyboard
interrupts. PA0 to PA3 are not bonded out on the 56-pin package.
These eight I/O lines comprise port B.The state of any pin is software
programmable. All port B lines are configured as input during power
on or external reset.
These eight I/O lines comprise port C.The state of any pin is software
programmable. All port C lines are configured as input during power
on or external reset. Each port C pins also has the ability to sink a
maximum current of 10mA with a maximum saturation of 1V.
MC68HC05F8
PIN DESCRIPTIONS
For More Information On This Product,
Go to: www.freescale.com
TPG
MOTOROLA
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