Z8F083ASJ020EG Zilog, Z8F083ASJ020EG Datasheet - Page 157

• Manufacturer Part Number: Z8F083ASJ020EG
• Description: IC ENCORE XP MCU FLASH 8K 28SOIC
• Manufacturer: Zilog
• Series: Encore!®r

Specifications of Z8F083ASJ020EG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 28-SOIC (7.5mm Width)
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 2
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: 770-1002 - ISP 4PORT ZILOG Z8 ENCORE! MCU269-4672 - KIT DEVELOPMENT F083A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details
• Other names: 269-4558-5

Oscillator Control
Operation
PS026308-1207
System Clock Selection
The Z8 Encore! F083A Series device uses five possible clocking schemes. Each one of
these is user-selectable.
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In addition, Z8 Encore! F083A Series devices contain clock failure detection and recovery
circuitry, allowing continued operation despite a failure of the primary oscillator.
This chapter discusses the logic used to select the system clock and handle primary
oscillator failures. A description of the specific operation of each oscillator is outlined
elsewhere in this document. The detailed description of the <Cross_Ref>Watchdog Timer
Oscillator starts on page 87, the internal precision oscillator description begins on page
155, and the chapter outlining the crystal oscillator begins on page 151 of this document.
The oscillator control block selects from the available clocks.
describes each clock source and its usage.
On-chip precision trimmed RC oscillator.
On-chip oscillator using off-chip crystal or resonator.
On-chip oscillator using external RC network.
External clock drive.
On-chip low precision Watchdog Timer Oscillator.
Z8 Encore!
Table 94
Product Specification
on page 146
®
F083A Series
Oscillator Control
145