mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 647

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

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29.3.8 ADC offset correction register (ADCx_OFS)
The ADC offset correction register (OFS) contains the user selected or calibration
generated offset error correction value. This register is a 2’s complement, left justified,
16-bit value. The value in the offset correction registers (OFS) is subtracted from the
conversion and the result is transferred into the result registers (Rn). If the result is above
the maximum or below the minimum result value, it is forced to the appropriate limit for
the current mode of operation.
Addresses: ADC0_OFS is FFFF_8600h base + 28h offset = FFFF_8628h
Freescale Semiconductor, Inc.
Bit
W
R
Reserved
31
0
AVGE
AVGS
31–16
15–0
Field
Field
OFS
1–0
30
2
0
29
0
28
0
0
1
Hardware average enable
AVGE enables the hardware average function of the ADC.
0
1
Hardware average select
AVGS determines how many ADC conversions will be averaged to create the ADC average result.
00
01
10
11
This read-only bitfield is reserved and always has the value zero.
Offset error correction value
27
0
One conversion or one set of conversions if the hardware average function is enabled (AVGE=1) after
initiating a conversion.
Continuous conversions or sets of conversions if the hardware average function is enabled (AVGE=1)
after initiating a conversion.
Hardware average function disabled.
Hardware average function enabled.
26
0
4 samples averaged.
8 samples averaged.
16 samples averaged.
32 samples averaged.
25
0
24
0
0
ADCx_SC3 field descriptions (continued)
MCF51JF128 Reference Manual, Rev. 2, 03/2011
23
0
22
0
ADCx_OFS field descriptions
21
0
20
0
19
0
18
0
Preliminary
17
0
16
0
15
0
Description
Description
14
0
13
0
Chapter 29 Analog-to-Digital Converter (ADC)
12
0
11
0
10
0
0
9
0
8
OFS
0
7
0
6
0
5
4
0
0
3
1
2
0
1
647
0
0