MC68HC08AS20 Datasheet, PDF (311/386 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

19.7.3 ADC Voltage In (ADCVIN)
ADCVIN is the input voltage signal from one of the 15 ADC channels to
the ADC module.
19.8 I/O Registers
These I/O registers control and monitor ADC operation:
• ADC status and control register (ADSCR)
• ADC data register (ADR)
• ADC clock register (ADICLK)
19.8.1 ADC Status and Control Register
The following paragraphs describe the function of the ADC status and
control register.
Address: $0038
Bit 7
6
5
4
3
2
1
Bit 0
Read: COCO
AIEN ADCO ADCH4 ADCH3 ADCH2 ADCH1 ADCH0
Write: R
Reset: 0
0
0
1
1
1
1
1
R = Reserved
Figure 19-2. ADC Status and Control Register (ADSCR)
COCO — Conversions Complete Bit
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.
1 = conversion completed (AIEN = 0)
0 = conversion not completed (AIEN = 0)
or
0 = CPU interrupt enabled (AIEN = 1)
MC68HC08AS20 — Rev. 4.1
Freescale Semiconductor
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