Z8F012ASB020SG 查看數據表（PDF） - Zilog

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Z8F012ASB020SG

High-Performance 8-Bit Microcontrollers Z8 Encore! XP® F082A Series

Zilog 

Z8 Encore! XP® F082A Series

Product Specification

193

Oscillator Control

The Z8 Encore! XP F082A Series devices uses five possible clocking schemes, each user-

selectable:

• Internal precision trimmed RC oscillator (IPO)

• On-chip oscillator using off-chip crystal or resonator

• On-chip oscillator using external RC network

• External clock drive

• On-chip low power Watchdog Timer oscillator

• Clock failure detection circuitry

In addition, Z8 Encore! XP F082A Series devices contain clock failure detection and

recovery circuitry, allowing continued operation despite a failure of the system clock

oscillator.

Operation

This chapter discusses the logic used to select the system clock and handle primary oscil-

lator failures.

System Clock Selection

The oscillator control block selects from the available clocks. Table 112 details each clock

source and its usage.

PS022827-1212

PRELIMINARY

Oscillator Control

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