Z8F16800144ZCOG Zilog, Z8F16800144ZCOG Datasheet - Page 325
Z8F16800144ZCOG
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
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Crystal Oscillator
Overview
Operating Modes
PS025011-1010
Note:
The products in the Z8 Encore! XP F1680 Series contain a main on-chip crystal oscillator
for use with external crystals with 1 MHz to 20 MHz frequencies, and a secondary 32 K
crystal oscillator. In addition, the external oscillator supports external
RC networks with oscillation frequencies up to 4 MHz. 32 K secondary crystal oscillator
has no external RC oscillator mode. The on-chip crystal oscillator can be used to
generate the primary system clock for the internal eZ8 CPU and the majority of the
on-chip peripherals. And the secondary 32 K crystal oscillator can only be used to
generate clock for three timers.
Alternatively, the X
(for X
the X
products do not contain an internal clock divider. The frequency of the signal on the X
input pin determines the frequency of the system clock, and the frequency of the signal on
the X2
Although the X
generator, the CLKIN pin is better suited for such use (see
page 305).
The main on-chip crystal oscillator supports three oscillator modes:
•
•
•
The main on-chip crystal oscillator mode is selected using user-programmable Flash
Option Bits. For information, see
The secondary 32 K crystal oscillator supports two oscillator modes:
•
•
The secondary 32 K crystal oscillator mode is selected using user-programmable Flash
Option Bits. For information, see
Medium power for use with medium frequency crystals or ceramic resonators
(1 MHz to 8 MHz).
Maximum power for use with high frequency crystals (8 MHz to 20 MHz).
On-chip oscillator configured for use with external RC networks or external
clock input (<4 MHz).
NORMAL mode for use with 32 K crystals (32 kHz).
On-chip oscillator configured for use with external clock input.
OUT
IN
IN
, 32 kHz–20 MHz; for X2
determines the frequency of timers.
or X2
IN
OUT
pin can be used as an main system clock input for an external clock
IN
pin must be left unconnected. The Z8 Encore! XP F1680 Series
and X2
P R E L I M I N A R Y
IN
input pin can also accept a CMOS-level clock input signal
IN
Flash Option Bits
Flash Option Bits
, below 4 MHz). If an external clock generator is used,
on page 267.
on page 267.
Z8 Encore! XP
System Clock Selection
Product Specification
®
Crystal Oscillator
F1680 Series
on
IN
311
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