Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 138

• 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

PS022825-0908
Caution:
ADC Compensation Details
High efficiency assembly code that performs this compensation is available for download
on www.zilog.com. The following is a bit-specific description of the ADC compensation
process used by this code.
The following data bit definitions are used:
0-9, a-f = bit indices in hexadecimal
s = sign bit
v = overflow bit
- = unused
Input Data
s b a 9 8 7 6 5
s s s s s 7 6 5
s e d c b a 9 8
Although the ADC can be used without the gain and offset compensation, it does exhibit
non-unity gain. Designing the ADC with sub-unity gain reduces noise across the ADC
range but requires the ADC results to be scaled by a factor of 8/7.
MSB
4 3 2 1 0 - - v (ADC)
s 6 5 4 3 2 1 0
4 3 2 1 0 0 0 0 (Offset)
7 6 5 4 3 2 1 0 (Gain)
LSB
Z8 Encore! XP
ADC Output Word; if v = 1,
the data is invalid
Offset Correction Byte
Offset Byte shifted to align
with ADC data
Gain Correction Word
Product Specification
Analog-to-Digital Converter
®
F082A Series
127