Z8F0113HJ005EG Datasheet, PDF (187/245 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F0823 Series
Product Specification
172
Table 105. Oscillator Control Register (OSCCTL)
Bit
7
6
5
4
3
2
1
0
Field
INTEN Reserved WDTEN POFEN WDFEN
SCKSEL
RESET
1
0
1
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
F86H
Bit
Description
[7]
INTEN
Internal Precision Oscillator Enable
1 = Internal precision oscillator is enabled.
0 = Internal precision oscillator is disabled.
[6]
Reserved
This bit is reserved and must be programmed to 0 during writes and to 0 when read.
[5]
Watchdog Timer Oscillator Enable
WDTEN 1 = Watchdog Timer oscillator is enabled.
0 = Watchdog Timer oscillator is disabled.
[4]
Primary Oscillator Failure Detection Enable
POFEN 1 = Failure detection and recovery of primary oscillator is enabled.
0 = Failure detection and recovery of primary oscillator is disabled.
[3]
Watchdog Timer Oscillator Failure Detection Enable
WDFEN 1 = Failure detection of Watchdog Timer oscillator is enabled.
0 = Failure detection of Watchdog Timer oscillator is disabled.
[2:0]
System Clock Oscillator Select
SCKSEL 000 = Internal precision oscillator functions as system clock at 5.53MHz.
001 = Internal precision oscillator functions as system clock at 32 kHz.
010 = Reserved.
011 = Watchdog Timer oscillator functions as system clock.
100 = External clock signal on PB3 functions as system clock.
101 = Reserved.
110 = Reserved.
111 = Reserved.
PS024315-1011
P R E L I M I N A R Y Oscillator Control Register Definitions