Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 208

• 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

Internal Precision Oscillator
Operation
PS022825-0908
The internal precision oscillator (IPO) is designed for use without external components.
You can either manually trim the oscillator for a non-standard frequency or use the auto-
matic factory-trimmed version to achieve a 5.53 MHz frequency. IPO features include:
An 8-bit trimming register, incorporated into the design, compensates for absolute
variation of oscillator frequency. Once trimmed the oscillator frequency is stable and does
not require subsequent calibration. Trimming is performed during manufacturing and is
not necessary for you to repeat unless a frequency other than 5.53 MHz (fast mode) or
32.8 kHz (slow mode) is required. This trimming is done at +30 ºC and a supply voltage of
3.3 V, so accuracy of this operating point is optimal.
If not used, the IPO can be disabled by the Oscillator Control register (see
trol Register Definitions
By default, the oscillator frequency is set by the factory trim value stored in the
write-protected Flash information page. However, the user code can override these trim
values as described in
Select one of two frequencies for the oscillator: 5.53 MHz and 32.8 kHz, using the
OSCSEL bits in the
•
•
•
•
On-chip RC oscillator that does not require external components
Output frequency of either 5.53 MHz or 32.8 kHz (contains both a fast and a slow
mode)
Trimmed through Flash option bits with user override
Elimination of crystals or ceramic resonators in applications where very high timing
accuracy is not required
Oscillator Control
Trim Bit Address Space
on page 190).
on page 187.
on page 158.
Z8 Encore! XP
Product Specification
Internal Precision Oscillator
®
F082A Series
Oscillator Con-
197