Z8F16800144ZCOG Zilog, Z8F16800144ZCOG Datasheet - Page 323

• 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

®
Z8 Encore! XP
F1680 Series
Product Specification
309
INTEN—Internal Precision Oscillator Enable
1 = Internal precision oscillator is enabled.
0 = Internal precision oscillator is disabled.
XTLEN—Crystal Oscillator Enable; this setting overrides the 
GPIO register control for PA0 and PA1
1 = Crystal oscillator is enabled.
0 = Crystal oscillator is disabled.
WDTEN—Watchdog Timer Oscillator Enable
1 = Watchdog Timer oscillator is enabled.
0 = Watchdog Timer oscillator is disabled.
POFEN—Primary Oscillator Failure Detection Enable
1 = Failure detection and recovery of primary oscillator is enabled.
0 = Failure detection and recovery of primary oscillator is disabled.
WDFEN—Watchdog Timer Oscillator Failure Detection Enable
1 = Failure detection of Watchdog Timer oscillator is enabled.
0 = Failure detection of Watchdog Timer oscillator is disabled.
SCKSEL—System Clock Oscillator Select
000 = Internal precision oscillator functions as system clock.
001 = Reserved.
010 = Crystal oscillator or external RC oscillator functions as system clock.
011 = Watchdog Timer oscillator functions as system.
100 = External clock signal on PB3 functions as system clock.
101 = Reserved.
110 = Reserved.
111 = Reserved.
Note:
The "INTEN" should be disabled when you use other clocks as system clock.
Oscillator Control1 Register
The Oscillator Control1 Register (OSCCTL1) enables/disables the secondary oscillator
circuits which becomes the peripheral clock. The Oscillator Control1 Register 
is also used to select the internal precision-oscillator frequency.
The Oscillator Control 1 Register must be unlocked before writing. Writing the 
to the Oscillator Control 1 Register 
two step sequence
followed by
E7H
18H
unlocks it. The register is locked at successful completion of a register write to the
OSCCTL1.
PS025011-1010
P R E L I M I N A R Y
Oscillator Control