Enhanced Queued Analog-to-Digital Converter (eQADC)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
18-92
Freescale Semiconductor
18.4.5.5
ADC Control Logic Overview and Command Execution
shows the basic logic blocks involved in the ADC control and how they interact.
CFIFOs/RFIFOs interact with ADC command/result message return logic through the FIFO control unit.
The EB and BN bits in the command message uniquely identify the ADC to which a command should be
sent. The FIFO control unit decodes these bits and sends the ADC command to the proper ADC. Other
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
GCC_FRAC
Figure 18-50. Gain Calibration Constant Format
Table 18-48. Gain Calibration Constant Format Field Descriptions
Field
Description
0
Reserved
1
GCC_I
NT[0]
Integer part of the gain calibration constant for ADC
n
. GCC_INT is the integer part of the gain calibration constant
(GCC) for ADC0/1.
2–15
GCC_
FRAC[1:14]
Fractional part of the gain calibration constant for ADC
n
. GCC_FRAC is the fractional part of the gain calibration
constant (GCC) for ADC
n
. GCC_FRAC can expresses decimal values ranging from 0 to 0.999938...
Table 18-49. Correspondence between Binary and Decimal Representations of the Gain Constant
Gain Constant
(GCC_INT.GCC_FRAC binary format)
Corresponding Decimal Value
0.0000_0000_0000_00
0
...
...
0.1000_0000_0000_00
0.5
...
...
0.1111_1111_1111_11
0.999938...
1.0000_0000_0000_00
1
...
...
1.1100_0000_0000_00
1.75
...
...
1.1111_1111_1111_11
1.999938...
Gain Calibration Constant (GCC)
Содержание MPC5565
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