mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 281

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

19.8 I/O Registers
19.8.1 ADC Status and Control Register
MC68HC08QA24
Freescale Semiconductor
Address:
These I/O registers control and monitor ADC operation:
These paragraphs describe the function of the ADC status and control
register.
COCO — Conversions Complete Bit
AIEN — ADC Interrupt Enable Bit
Reset:
Read:
Write:
•
•
•
When the AIEN bit is a logic 0, the COCO is a read-only bit which is
set each time a conversion is completed. This bit is cleared whenever
the ADC status and control register is written or whenever the ADC
data register is read. Reset clears this bit.
or
When this bit is set, an interrupt is generated at the end of an ADC
conversion. The interrupt signal is cleared when the data register is
read or the status/control register is written. Reset clears the AIEN bit.
Figure 19-2. ADC Status and Control Register (ADSCR)
1 = Conversion completed (AIEN = 0)
0 = Conversion not completed (AIEN = 0)
0 = CPU interrupt enabled (AIEN = 1)
1 = ADC interrupt enabled
0 = ADC interrupt disabled
ADC status and control register (ADSCR)
ADC data register (ADR)
ADC clock register (ADICLK)
COCO
$0038
Bit 7
Analog-to-Digital Converter (ADC)
R
R
0
= Reserved
AIEN
6
0
ADCO
5
0
ADCH4
4
1
ADCH3
3
1
Analog-to-Digital Converter (ADC)
ADCH2
2
1
ADCH1
1
1
Technical Data
ADCH0
Bit 0
1
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