mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 646

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

Register Definition
29.3.7 Status and control register 3 (ADCx_SC3)
The SC3 register controls the calibration, continuous convert, and hardware averaging
functions of the ADC module.
Addresses: ADC0_SC3 is FFFF_8600h base + 24h offset = FFFF_8624h
646
Reset
Reset
Bit
Bit
W
W
Reserved
Reserved
R
R
ADCO
CALF
31–8
Field
CAL
5–4
7
6
3
31
15
0
0
30
14
0
0
This read-only bitfield is reserved and always has the value zero.
Calibration
CAL begins the calibration sequence when set. This bit stays set while the calibration is in progress and is
cleared when the calibration sequence is completed. The CALF bit must be checked to determine the
result of the calibration sequence. Once started, the calibration routine cannot be interrupted by writes to
the ADC registers or the results will be invalid and the CALF bit will set. Setting the CAL bit will abort any
current conversion.
Calibration failed flag
CALF displays the result of the calibration sequence. The calibration sequence will fail if ADTRG = 1, any
ADC register is written, or any stop mode is entered before the calibration sequence completes. The
CALF bit is cleared by writing a 1 to this bit.
0
1
This read-only bitfield is reserved and always has the value zero.
Continuous conversion enable
ADCO enables continuous conversions.
Calibration completed normally.
Calibration failed. ADC accuracy specifications are not guaranteed.
29
13
0
0
28
12
0
0
MCF51JF128 Reference Manual, Rev. 2, 03/2011
0
27
11
0
0
ADCx_SC3 field descriptions
Table continues on the next page...
26
10
0
0
25
0
0
9
Preliminary
24
0
0
8
0
Description
CAL
23
0
0
7
CALF
22
0
0
6
21
0
0
5
0
20
0
0
4
Freescale Semiconductor, Inc.
19
0
0
3
18
0
0
2
17
0
0
1
AVGS
16
0
0
0