MC68HC08BD24 Datasheet, PDF (27/244 Pages) Motorola, Inc – HCMOS Microcontroller Unit

1.6 Pin Functions
Description of the pin functions are provided in Table 1-1.
Table 1-1. Pin Functions
PIN NAME
VDD
VSS
VDD3
VSS1
OSC1
OSC2
RST
IRQ
VSYNC
HSYNC
PTA7/PWM15–PTA0/PWM8
PTB7/PWM7–PTB0/PWM0
PIN DESCRIPTION
Power supply input to the MCU.
Power supply ground.
3.3V regulated output from the MCU.
Power supply ground.
Connections to the on-chip oscillator.
An external clock can be connected directly to
OSC1; with OSC2 floating. These are 3.3V pins.
See Section 8. Oscillator (OSC).
A logic 0 on the RST pin forces the MCU to a
known startup state. RST is bidirectional, allowing
a reset of the entire system. It is driven low when
any internal reset source is asserted. This pin
contains an internal pullup resistor.
See Section 7. System Integration Module
(SIM).
External IRQ pin; with software programmable
internal pull-up and schmitt trigger input.
This pin is also used for mode entry selection.
See Section 7. System Integration Module
(SIM).
Vsync input to the sync processor.
See Section 14. Sync Processor.
Hsync input to the sync processor.
See Section 14. Sync Processor.
These are shared-function pins. Each pin can be
configured as a standard I/O pin or a PWM output
channel.
See Section 15. Input/Output (I/O) Ports and
Section 11. Pulse Width Modulator (PWM).
These are shared-function pins. Each pin can be
configured as a standard I/O pin or a PWM output
channel.
See Section 15. Input/Output (I/O) Ports and
Section 11. Pulse Width Modulator (PWM).
MC68HC08BD24 — Rev. 1.1
Freescale Semiconductor
Technical Data
27