z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 257

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 122. ADC0 Control Register 0 (ADC0CTL)
BITS
FIELD
RESET
R/W
ADDR
PS022006-0207
Bit Position
[7]
START0
[6]
CVTRD0
[5]
REFEN
[4]
ADC0EN
[3:0]
ANAIN0
ADC0 Control Register 0
START0
R/W1
7
0
Value (H) Description
The ADC0 Control register initiates the A/D conversion and provides ADC0 status
information.
0000
0001
0010
0
1
0
1
0
1
0
1
CVTRD0
R/W
ADC0 Start / Busy
Writing to 0 has no effect.
Reading a 0 indicates the ADC0 is available to begin a conversion.
Writing to 1 starts a conversion on ADC0.
Reading a 1 indicates a conversion is currently in progress.
Convert On Read
The ADC0 operates normally.
If this bit is set to one, whenever the ADC0D register is read it increments the
ANAIN field by one and start a new conversion. The ANAIN field increments
until it reaches the value set in the ADC0MAX register. After doing the
conversion on the channel specified by the ADC0MAX register, the next read
resets the ANAIN field to zero. This function is used with the DMA to perform
continuous conversions.
Reference Enable
Internal reference voltage is disabled allowing an external reference voltage to
be used by the ADC0.
Internal reference voltage for the ADC0 is enabled. The internal reference
voltage is measured on the VREF pin.
ADC0 Enable
ADC0 is disabled for low power operation.
ADC0 is enabled for normal use.
Analog Input Select
ANA0 input is selected for analog to digital conversion.
ANA1 input is selected for analog to digital conversion.
ANA2 input is selected for analog to digital conversion.
6
0
REFEN
R/W
5
0
P R E L I M I N A R Y
ADC0EN
R/W
4
0
FF-E500H
R/W
3
0
R/W
2
0
ANAIN0[3:0]
Product Specification
ZNEO
R/W
1
0
Analog Functions
™
Z16F Series
R/W
0
0
243