XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 477

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

26.8 I/O Registers
26.8.1 ADC Status and Control Register
MC68HC908AZ60A — Rev 2.0
MOTOROLA
Address:
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.
If the AIEN bit is a logic 1, the COCO is a read/write bit which selects
the CPU to service the ADC interrupt request. Reset clears this bit.
Figure 26-2. 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)
COCO
$0038
Bit 7
CPU interrupt enabled (AIEN = 1)
Analog-to-Digital Converter (ADC)
R
R
0
= Reserved
AIEN
6
0
or
ADCO
5
0
CH4
4
1
CH3
3
1
Analog-to-Digital Converter (ADC)
CH2
2
1
CH1
1
1
Technical Data
I/O Registers
Bit 0
CH0
1
477