WM8351CGEB/RV WOLFSON [Wolfson Microelectronics plc], WM8351CGEB/RV Datasheet - Page 174
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WM8351CGEB/RV
Manufacturer Part Number
WM8351CGEB/RV
Description
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet
1.WM8351CGEBRV.pdf
(330 pages)
- Current page: 174 of 330
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WM8351
w
R152 (98h)
AUX1
R153 (99h)
AUX2
R154 (9Ah)
AUX3
R155 (9Bh)
AUX4
R156 (9Ch)
USB Voltage
Readback
R157 (9Dh)
LINE Voltage
Readback
R158 (9Eh)
BATT Voltage
Readback
R159 (9Fh)
Chip
Temperature
Readback
R145 (91h)
Digitizer Control
(2)
Table 117 Reading AUXADC Measurements
In a typical application, one of the following methods is likely to be used to control the AUXADC
readback:
For interrupt-driven AUXADC readback, the host processor would read the AUXADC data registers in
response to the AUXADC Interrupt or ADA output. In Continuous AUXADC mode, the processor
should complete this action before the next measurement occurs, in order to avoid losing any
AUXADC samples. In Polling mode, the interrupt (or ADA) signal provides confirmation that the
commanded set of measurements has been completed.
For host-controlled AUXADC readback, the Continuous AUXADC mode would be used, and the
AUXADC_WAIT bit would be asserted. The host processor would read the AUXADC data registers
periodically, causing the next AUXADC measurement to be enabled. This limits the frequency of the
AUXADC measurements to the readback frequency.
ADDRESS
11:0
11:0
11:0
11:0
11:0
BIT
0
AUXADC_DATA
n [11:0]
AUXADC_DATA_
USB [11:0]
AUXADC_DATA_
LINE [11:0]
AUXADC_DATA_
BATT [11:0]
AUXADC_DATA_
CHIPTEMP [11:0]
AUXADC_WAIT
LABEL
DEFAULT
000h
0h
0h
0h
0h
0
Measured AUXn data value
relative to reference:
000 = 0V
FFF = measured voltage after
divide matches reference
Measured USB voltage data value.
Measured LINE voltage data value
Measured Battery Voltage
Measured Internal chip
temperature
Whether the old data must be read
before new conversions can be
made
0 = No effect (new conversions
overwrite old)
1 = New conversions are held
back (and measurements delayed)
until AUX_DATAn has been read.
PD, April 2012, Rev 4.5
DESCRIPTION
Production Data
174
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