PXR40RM Datasheet, PDF (1034/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Enhanced Queued Analog-to-Digital Converter (EQADC)
Field
0
1–15
ALTGCC0/1x
Table 27-29. ADC0/1_AGRx Field Descriptions
Description
Reserved
Alternate Gain Calibration Constant. ALTGCC0/1x[0:14] contain the gain calibration constants used to
fine-tune ADC0/1 conversion results for alternate configurations 1 and 2. The gain calibration constants
are 15-bit unsigned fixed point numbers expressed in the GCC_INT.GCC_FRAC binary format. The integer
part of the gain constants (GCC_INT) contain a single binary digit while their fractional part (GCC_FRAC)
contain fourteen digits. For details about the GCC data format refer to Section 27.7.6.6.2, MAC Unit and
Operand Data Format.
27.6.3.8 ADC0/1 Alternate Offset Register (ADC0_AOR1-2 and ADC1_AOR1-2)
The Alternate Offset Registers (ADC0_AORx and ADC1_AORx, x=1-2) contain the offset calibration
constants used to fine-tune ADCs conversion results for alternate configurations 1 and 2. The offset
constants are signed 14-bit integer values. Refer to Section 27.7.6.6, ADC Calibration Feature, for details
about the calibration scheme used in the EQADC.
ADC0 Register Address: 0x32, 0x36
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R0
0
W
ALTOCC0x
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
ADC1 Register Address: 0x31, 0x35
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R0
0
W
ALTOCC1x
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 27-40. ADC0/1 Alternate x Offset Registers (ADC0/1_AORx, x=1-2)
Table 27-30. ADC0/1_AORx Field Descriptions
Field
0–1
2–15
ALTOCC0/1x
Description
Reserved
Alternate Offset Calibration Constant.ALTOCC0/1x[0:13] contain the offset calibration constants used to
fine-tune ADCs conversion results for alternate configurations 1 or 2. Negative values should be expressed
using the two’s complement representation.
27.6.3.9 ADC Pull Up/Down Control Register x (ADC_PUDCRx, x=0-7)
The ADC Pull Up/Down Control Register x (ADC_PUDCRx) contains configuration bits for pull up and
pull down resistors present at ADC input channels x, x=0 to 7.
27-52
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor