Z8F1233QH020SG Zilog, Z8F1233QH020SG Datasheet - Page 156

• Manufacturer Part Number: Z8F1233QH020SG
• Description: IC ENCORE XP MCU FLSH 12K 20QFN
• Manufacturer: Zilog
• Series: Encore!®r

Specifications of Z8F1233QH020SG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• For Use With: 770-1002 - ISP 4PORT ZILOG Z8 ENCORE! MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Other names: 269-4656

Table 94. Oscillator Control Register (OSCCTL)
Oscillator Control Register Definitions
BITS
FIELD
RESET
R/W
ADDR
PS025111-1207
Oscillator Control Register
INTEN
R/W
1
7
The oscillator control register (OSCCTL) enables/disables the various oscillator circuits,
enables/disables the failure detection/recovery circuitry, and selects the primary oscillator,
which becomes the system clock.
The oscillator control register must be unlocked before writing. Writing the two step
sequence
locked at successful completion of a register write to the OSCCTL.
displays the oscillator control clock switching flow. See
time of various oscillator circuits.
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 at 5.53 MHz
001 = Internal Precision Oscillator functions as system clock at 32 kHz
XTLEN
E7H
R/W
6
0
followed by
WDTEN
R/W
5
1
18H
to the oscillator control register unlocks it. The register is
POFEN
R/W
0
4
F86H
WDFEN
R/W
3
0
Table 112
R/W
Z8 Encore!
0
2
Product Specification
on page 181 for waiting
Figure 24
SCKSEL
R/W
1
0
®
Oscillator Control
F0830 Series
on page 147
R/W
0
0
146