mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 189

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter (S08ADC12V1)
Reset
Initialize ADC
ADCCFG = 0x98
ADCSC2 = 0x00
ADCSC1 = 0x41
No
Check
COCO=1?
Yes
Read ADCRH
Then ADCRL To
Clear COCO Bit
Continue
Figure 9-12. Initialization Flowchart for Example
9.6
Application Information
This section contains information for using the ADC module in applications. The ADC has been designed
to be integrated into a microcontroller for use in embedded control applications requiring an A/D
converter.
9.6.1
External Pins and Routing
The following sections discuss the external pins associated with the ADC module and how they should be
used for best results.
9.6.1.1
Analog Supply Pins
The ADC module has analog power and ground supplies (V
and V
) available as separate pins on
DDA
SSA
some devices. V
is shared on the same pin as the MCU digital V
on some devices. On other devices,
SSA
SS
V
and V
are shared with the MCU digital supply pins. In these cases, there are separate pads for
SSA
DDA
the analog supplies bonded to the same pin as the corresponding digital supply so that some degree of
isolation between the supplies is maintained.
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor
9-23