z8fmc16100 ZiLOG Semiconductor, z8fmc16100 Datasheet - Page 244

• Manufacturer Part Number: z8fmc16100
• Description: Z8 Encore Motor Control Flash Mcus
• Manufacturer: ZiLOG Semiconductor

PS024611-0408
Bit Position
[7]
INTEN
[6]
XTLEN
[5]
WDTEN
[4]
POFEN
[3]
WDFEN
[2]
FLPEN
[1:0]
SCKSEL
Oscillator Divide Register
The Oscillator Divide register (OSCDIV) provides the value that divides the system clock.
The Oscillator Divide register must be unlocked before writing. Writing the two-step
sequence
register. The register locks after completion of a register Write to the OSCDIV.
Value (H) Description
00
01
10
11
0
1
0
1
0
1
0
1
0
1
0
1
E7h
, followed by
Internal Precision Oscillator Enable
Internal precision oscillator is disabled.
Internal precision oscillator is enabled.
Crystal Oscillator Enable
Crystal oscillator is disabled.
Crystal oscillator is enabled.
Watchdog Timer Oscillator Enable
Watchdog Timer oscillator is disabled.
Watchdog Timer oscillator is enabled.
Primary Oscillator Failure Detection Enable
Failure detection and recovery of primary oscillator is disabled. This bit is
cleared automatically if a primary oscillator failure is detected.
Failure detection and recovery of primary oscillator is enabled.
Watchdog Timer Oscillator Failure Detection Enable
Failure detection of Watchdog Timer oscillator is disabled.This bit is
cleared automatically if a Watchdog Timer oscillator failure is detected.
Failure detection of Watchdog Timer oscillator is enabled.
Flash Low Power Mode Enable
Flash Low Power Mode is disabled.
Flash Low Power Mode is enabled. The Flash is powered down during idle
periods of the clock and powered up during Flash reads. This bit should
only be set if the frequency of the primary oscillator source is 8 MHz or
lower. The reset value of this bit is controlled by the LPDEN option bit during
reset.
System Clock Oscillator Select
Internal precision oscillator functions as system clock at 5.6 MHz.
Crystal oscillator or external clock driver functions as system clock .
Reserved.
Watchdog Timer oscillator functions as system clock.
18h
, to the Oscillator Control register address unlocks the
Z8FMC16100 Series Flash MCU
Product Specification
Oscillator Divide Register
232