MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
19-42 Freescale Semiconductor
19.3.3.4 ADCn Gain Calibration Constant Registers (ADC0_GCCR and
ADC1_GCCR)
The ADCn_GCCR contains the gain calibration constant used to fine-tune the ADCn conversion results.
Refer to Section 19.4.5.4, “ADC Calibration Feature,” for details about the calibration scheme used in the
eQADC.
19.3.3.5 ADCn Offset Calibration Constant Registers (ADC0_OCCR and
ADC1_OCCR)
The ADCn_OCCR contains the offset calibration constant used to fine-tune of ADC0/1 conversion results.
The offset constant is a signed 14-bit integer value. Refer to Section 19.4.5.4, “ADC Calibration Feature,”
for details about the calibration scheme used in the eQADC.
0123456789101112131415
R0 GCC0
W
Reset0100000000000000
Reg Addr 0x04
0123456789101112131415
R0 GCC1
W
Reset0100000000000000
Reg Addr 0x04
Figure 19-22. ADCn Gain Calibration Constant Registers (ADCn_GCCR)
Table 19-32. ADCn_GCCR Field Descriptions
Bits Name Description
0 — Reserved.
1–15 GCCn
[0:14]
ADCn gain calibration constant. Contains the gain calibration constant used to fine-tune
ADCn conversion results. It is a unsigned 15-bit fixed pointed value. The gain calibration
constant is an unsigned fixed point number expressed in the GCC_INT.GCC_FRAC binary
format. The integer part of the gain constant (GCC_INT) contains a single binary digit while
its fractional part (GCC_FRAC) contains 14 digits. For details about the GCC data format
refer to Section 19.4.5.4.2, “MAC Unit and Operand Data Format.”
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