M68HC08 datasheet(32/408 Pages) MOTOROLA

32 / 408 page

General Description

Technical Data

MC68HC908GR8 — Rev 4.0

General Description

MOTOROLA

Figure 1-4. Power Supply Bypassing

1.6.2 Oscillator Pins (OSC1 and OSC2)

The OSC1 and OSC2 pins are the connections for the on-chip oscillator

circuit. See Clock Generator Module (CGMC).

1.6.3 External Reset Pin (RST)

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 that is always activated, even when the reset pin is pulled low.

See Resets and Interrupts.

1.6.4 External Interrupt Pin (IRQ)

IRQ is an asynchronous external interrupt pin. This pin contains an

internal pullup resistor that is always activated, even when the reset pin

is pulled low. See External Interrupt (IRQ).

1.6.5 CGM Power Supply Pins (VDDA and VSSA)

VDDA and VSSA are the power supply pins for the analog portion of the

clock generator module (CGM). Decoupling of these pins should be as

per the digital supply. See Clock Generator Module (CGMC).

MCU

VDD

0.1

µF

VSS

VDD

NOTE: Component values shown represent typical applications.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

M68HC08 Datasheet(PDF) 32 Page - Motorola, Inc