MC68HC908LD64 Datasheet, PDF (37/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

General Description
Pin Functions
1.6 Pin Functions
Description of the pin functions are provided in Table 1-1.
Table 1-1. Pin Functions
PIN NAME
VDD1, VDD2
VSS1, VSS2
VDDA
VSSA
OSC1, OSC2
RST
IRQ
CGMXFC
VSYNC
HSYNC
PTA7/KBI7–PTA0/KBI0
PIN DESCRIPTION
Power supply input to the MCU.
Power supply ground.
Power supply input for analog circuits.
Power supply ground for analog circuits.
Crystal connections to the on-chip oscillator.
An external clock can be connected directly to
OSC1; with OSC2 floating.
See Section 7. Oscillator (OSC).
External reset pin; active low; with internal pull-up
and schmitt trigger input. It is driven low when any
internal reset source is asserted.
See Section 9. System Integration Module
(SIM).
External IRQ pin; with schmitt trigger input and
internal pull-up. This pin is also used for mode
entry selection.
See Section 20. External Interrupt (IRQ) and
Section 9. System Integration Module (SIM).
External filter capacitor connection for the CGM
module.
See Section 8. Clock Generator Module (CGM).
Vsync input to the sync processor.
This pin is rated at +5V.
See Section 17. Sync Processor.
Hsync input to the sync processor.
This pin is rated at +5V.
See Section 17. Sync Processor.
These are shared function, bidirectional I/O port
pins. Each pin contains a pull-up device to VDD
when it is configured as an external keyboard
interrupt pin.
See Section 19. Input/Output (I/O) Ports and
Section 21. Keyboard Interrupt Module (KBI).
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor
General Description
Data Sheet
37