Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 198

• Manufacturer Part Number: Z8F042AHJ020SC00TR
• Description: IC ENCORE XP MCU FLASH 4K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHJ020SC00TR

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 23
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Z8F042AHJ020SC00T

Oscillator Control
Operation
PS022825-0908
System Clock Selection
The Z8 Encore! XP
user-selectable:
In addition, Z8 Encore! XP F082A Series devices contain clock failure detection and
recovery circuitry, allowing continued operation despite a failure of the system clock
oscillator.
This chapter discusses the logic used to select the system clock and handle primary
oscillator failures.
The oscillator control block selects from the available clocks.
source and its usage.
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•
•
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Internal precision trimmed RC oscillator (IPO).
On-chip oscillator using off-chip crystal or resonator.
On-chip oscillator using external RC network.
External clock drive.
On-chip low power Watchdog Timer oscillator.
Clock failure detection circuitry.
®
F082A Series devices uses five possible clocking schemes, each
Z8 Encore! XP
Table 108
Product Specification
details each clock
®
F082A Series
Oscillator Control
187