mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 652

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Functional description
29.4 Functional description
The ADC module is disabled during reset, in low power stop mode (refer to the Power
Management information for details), or when the ADCH bits in SC1n are all high. The
module is idle when a conversion has completed and another conversion has not been
initiated. When it is idle and the asynchronous clock output enable is disabled
(ADACKEN is 0), the module is in its lowest power state. The ADC can perform an
analog-to-digital conversion on any of the software selectable channels. All modes
perform conversion by a successive approximation algorithm.
To meet accuracy specifications, the ADC module must be calibrated using the on chip
calibration function. See
When the conversion is completed, the result is placed in the data registers (Rn). The
respective conversion complete flag (COCO) is then set and an interrupt is generated if
the respective conversion complete interrupt has been enabled (AIEN=1).
The ADC module has the capability of automatically comparing the result of a
conversion with the contents of the compare value registers. The compare function is
enabled by setting the ACFE bit and operates with any of the conversion modes and
configurations.
The ADC module has the capability of automatically averaging the result of multiple
conversions. The hardware average function is enabled by setting the AVGE bit and
operates with any of the conversion modes and configurations.
652
Reserved
CLP0
31–6
Field
5–0
For the chip specific modes of operation, refer to the Power
Management information of this MCU.
This read-only bitfield is reserved and always has the value zero.
Calibration value
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Calibration function
ADCx_CLP0 field descriptions
Preliminary
NOTE
for details on how to perform calibration.
Description
Freescale Semiconductor, Inc.