MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
19-50
Freescale Semiconductor
Write Configuration Command Message Format for On-Chip ADC Operation
describes the command message format for a write configuration command when interfacing
with the on-chip ADCs. A write configuration command is used to set the control registers of the on-chip
ADCs. No conversion data will be returned for a write configuration command. Write configuration
commands are differentiated from read configuration commands by a negated R/W bit.
15
FMT
Conversion data format. FMT specifies to the eQADC how to format the 12-bit conversion
data returned by the ADCs into the 16-bit format which is sent to the RFIFOs. See
“ ADC Result Format for On-Chip ADC Operation
,” for details.
0 Right justified unsigned.
1 Right justified signed.
16–23
CHANNEL_
NUMBER
[0:7]
Channel number. Selects the analog input channel. The software programs this field with
the channel number corresponding to the analog input pin to be sampled and converted.
See
Section 19.4.6.1, “Channel Assignment
,” for details.
24–31
—
Reserved.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
EOQ
PAUSE
Reserved
EB
(0b0)
BN
R/W
(0b0)
ADC_REGISTER HIGH BYTE
CFIFO Header
ADC Command
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
ADC_REGISTER LOW BYTE
ADC_REG_ADDRESS
ADC Command
Figure 19-27. Write Configuration Command Message Format for
On-chip ADC Operation
Table 19-34. On-Chip ADC Field Descriptions:
Conversion Command Message Format (Continued)
Bits
Name
Description
Summary of Contents for MPC5553
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