Z8F16800144ZCOG Zilog, Z8F16800144ZCOG Datasheet - Page 319

• Manufacturer Part Number: Z8F16800144ZCOG
• Description: KIT DEV FOR Z8F642 MCU 44 PIN
• Manufacturer: Zilog
• Series: Z8 Encore!®r
• Type: MCUr

Specifications of Z8F16800144ZCOG

• Contents: Hardware, Software and Documentation
• For Use With/related Products: Z8F642
• For Use With: 269-4661 - KIT ACC ETHERNET SMART CABLE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-4678

Oscillator Control
Overview
Operation
PS025011-1010
System Clock Selection
The Z8 Encore! XP F1680 Series devices use five possible clocking schemes, each user-
selectable:
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•
•
•
•
In addition, Z8 Encore! XP F1680 Series devices contain:
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•
This chapter discusses the logic used to select the system clock and handle primary
oscillator failures. A description of the specific operation of each oscillator is outlined
elsewhere in this document. The detailed description of the
starts on page 137, the
chapter outlining the
The oscillator control block is selected from the available clocks.
details each clock source and its usage.
On-chip precision trimmed RC oscillator
On-chip oscillator using off-chip crystal or resonator
On-chip oscillator using external RC network
External clock drive
On-chip low precision Watchdog Timer oscillator
A clock failure detection and recovery circuitry allowing continued operation despite a
failure of the primary oscillator
A peripheral clock that allows timers to be clocked directly from an external 
32 kHz watch crystal
Crystal Oscillator
Internal Precision Oscillator
P R E L I M I N A R Y
begins on page 311.
description starts on page 317, and the
Z8 Encore! XP
Watchdog Timer
Product Specification
Table 168
®
Oscillator Control
F1680 Series
on page 306
Oscillator
305