MC68HC08AS32 Datasheet, PDF (313/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Analog-to-Digital Converter (ADC)
Interrupts
19.4.4 Continuous Conversion Mode
In the continuous conversion mode, the ADC continuously converts the
selected channel, filling the ADC data register with new data after each
conversion. Data from the previous conversion will be overwritten
whether that data has been read or not. Conversions will continue until
the ADCO bit is cleared. The COCO bit (ADC status control register,
$0038) is set after each conversion and can be cleared by writing the
ADC status and control register or reading of the ADC data register.
19.4.5 Accuracy and Precision
The conversion process is monotonic and has no missing codes. See
21.7 ADC Characteristics for accuracy information.
19.5 Interrupts
When the AIEN bit is set, the ADC module is capable of generating a
CPU interrupt after each ADC conversion. A CPU interrupt is generated
if the COCO bit is at logic 0. The COCO bit is not used as a conversion
complete flag when interrupts are enabled.
19.6 Low-Power Modes
The following subsections describe the low-power modes.
19.6.1 Wait Mode
The ADC continues normal operation during wait mode. Any enabled
CPU interrupt request from the ADC can bring the MCU out of wait
mode. If the ADC is not required to bring the MCU out of wait mode,
power down the ADC by setting the ADCH[4:0] bits in the ADC status
and control register to logic 1s before executing the WAIT instruction.
MC68HC08AS32 — Rev. 3.0
MOTOROLA
Analog-to-Digital Converter (ADC)
Advance Information
313