Z8F042AHJ020SC00TR Zilog, Z8F042AHJ020SC00TR Datasheet - Page 141

• 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

Table 71. ADC Control Register 0 (ADCCTL0)
ADC Control Register Definitions
BITS
FIELD
RESET
R/W
ADDR
PS022825-0908
Warning:
ADC Control Register 0
CEN
R/W
7
0
The ADC Control Register 0 (ADCCTL0) selects the analog input channel and initiates
the analog-to-digital conversion. It also selects the voltage reference configuration.
CEN—Conversion Enable
0 = Conversion is complete. Writing a 0 produces no effect. The ADC automatically clears
this bit to 0 when a conversion is complete.
1 = Begin conversion. Writing a 1 to this bit starts a conversion. If a conversion is already
in progress, the conversion restarts. This bit remains 1 until the conversion is complete.
REFSELL—Voltage Reference Level Select Low Bit; in conjunction with the High bit
(REFSELH) in
voltage reference; the following details the effects of {REFSELH, REFSELL}; note that
this reference is independent of the Comparator reference.
00= Internal Reference Disabled, reference comes from external pin
01= Internal Reference set to 1.0 V
10= Internal Reference set to 2.0 V (default)
11= Reserved
REFOUT
0 = Reference buffer is disabled; Vref pin is available for GPIO or analog functions
1 = The internal ADC reference is buffered and driven out to the Vref pin
CONT
0 = Single-shot conversion. ADC data is output once at completion of the 5129 system
clock cycles (measurements of the internal temperature sensor take twice as long)
1 = Continuous conversion. ADC data updated every 256 system clock cycles after an
initial 5129 clock conversion (measurements of the internal temperature sensor take twice
as long)
When the ADC is used with an external reference ({REFSELH,REFSELL}=00), the
REFOUT bit must be set to 0.
REFSELL REFOUT
R/W
—
6
0
Internal Reference Output Enable
ADC Control/Status Register
R/W
5
0
CONT
R/W
4
0
F70H
1, this determines the level of the internal
R/W
3
0
Z8 Encore! XP
R/W
2
0
ANAIN[3:0]
Product Specification
Analog-to-Digital Converter
R/W
1
0
®
F082A Series
R/W
0
0
130