MC68HC908JK3 MOTOROLA [Motorola, Inc], MC68HC908JK3 Datasheet - Page 142

• Manufacturer Part Number: MC68HC908JK3
• Description: MC68HC908JK1
• Manufacturer: MOTOROLA [Motorola, Inc]

Analog-to-Digital Converter (ADC)
11.7.1 ADC Voltage In (ADCVIN)
11.8 I/O Registers
11.8.1 ADC Status and Control Register
Technical Data
142
Address:
ADCVIN is the input voltage signal from one of the 12 ADC channels to
the ADC module.
These I/O registers control and monitor ADC operation:
The following paragraphs describe the function of the ADC Status and
Control register.
COCO — Conversions Complete 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.
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.
Figure 11-3. ADC Status and Control Register (ADSCR)
1 = conversion completed (AIEN = 0)
0 = conversion not completed (AIEN = 0)
ADC Status and Control register (ADSCR)
ADC data register (ADR)
ADC clock register (ADICLK)
$003C
COCO
Bit 7
Analog-to-Digital Converter (ADC)
0
= Unimplemented
AIEN
6
0
ADCO
5
0
CH4
4
1
CH3
3
1
MC68H(R)C908JL3
CH2
2
1
CH1
1
1
MOTOROLA
—
Rev. 1.0
Bit 0
CH0
1