z8f0813 ZiLOG Semiconductor, z8f0813 Datasheet - Page 134

• Manufacturer Part Number: z8f0813
• Description: High-performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 73. ADC Control/Status Register 1 (ADCCTL1)
Table 74. ADC Data High Byte Register (ADCD_H)
BITS
FIELD
RESET
R/W
ADDR
BITS
FIELD
RESET
R/W
ADDR
PS024314-0308
ADC Control/Status Register 1
ADC Data High Byte Register
REFSELH
R/W
R
7
1
7
X
The second ADC Control register contains the voltage reference level selection bit.
REFSELH—Voltage Reference Level Select High Bit; in conjunction with the Low bit
(REFSELL) in
reference; the following details the effects of {REFSELH, REFSELL}; 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)
The ADC Data High Byte register contains the upper eight bits of the ADC output. The
output is an 11-bit two’s complement value. During a single-shot conversion, this value is
invalid. Access to the ADC Data High Byte register is read-only. Reading the ADC Data
High Byte register latches data in the ADC Low Bits register.
ADCDH—ADC Data High Byte
This byte contains the upper eight bits of the ADC output. These bits are not valid during a
single-shot conversion. During a continuous conversion, the most recent conversion out-
put is held in this register. These bits are undefined after a Reset.
R/W
X
R
6
0
6
ADC Control Register
R/W
R
X
5
0
5
R/W
X
R
4
0
4
ADCDH
0, this determines the level of the internal voltage
F71H
F72H
Reserved
R/W
R
X
3
0
3
Z8 Encore! XP
R/W
X
R
2
0
2
Product Specification
Analog-to-Digital Converter
R/W
R
X
1
0
1
®
F0823 Series
R/W
X
R
0
0
0
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