PXR40RM Datasheet, PDF (1044/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Enhanced Queued Analog-to-Digital Converter (EQADC)
Table 27-33. Field Descriptions (continued)
Field
Description
16–23
CHANNEL_
NUMBER
Channel Number Field. The CHANNEL_NUMBER field 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 27.7.7.1, Channel Assignment, for details.
24–31
Alternate Configuration Selection. This field selects one of the alternate configurations.
ALT_CONFIG_SEL
ALT_CONFIG_SEL[0:7] Alternate Configuration
0x08
1
0x09
2
0x0A
3
0x0B
4
0x0C
5
0x0D
6
0x0E
7
0x0F
8
Write Configuration Command Format for On-Chip ADC Operation
Figure 27-45 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.
0
1
2 345678
EOQ
PAUSE
REP
RESERVED
EB
(0b0)
BN
R/W
(0b0)
CFIFO Header
9 10 11 12 13 14 15
ADC_REGISTER HIGH BYTE
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 27-45. Write Configuration Command Format for On-Chip ADC Operation
27-62
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor