MC68HC08JK1 Datasheet, PDF (132/198 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Analog-to-Digital Converter (ADC)
11.7.1 ADC Voltage In (ADCVIN)
ADCVIN is the input voltage signal from one of the 12 ADC channels to
the ADC module.
11.8 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)
11.8.1 ADC Status and Control Register
The following paragraphs describe the function of the ADC Status and
Control register.
Address: $003C
Bit 7
6
5
4
3
2
1
Bit 0
Read: COCO
AIEN ADCO CH4
CH3
CH2
CH1
CH0
Write:
Reset: 0
0
0
1
1
1
1
1
= Unimplemented
Figure 11-3. 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)
When the AIEN bit is a logic 1 (CPU interrupt enabled), the COCO is
a read-only bit, and will always be logic 0 when read.
Technical Data
132
Analog-to-Digital Converter (ADC)
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MC68H(R)C08JL3 — Rev. 4
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