ADAU1702
2057 TO 2060 (0x809 TO 0x80C)鈥擜UXILIARY ADC DATA REGISTERS
These registers hold the data generated by the 4-channel
auxiliary ADC. The ADCs have eight bits of precision and can
be extended to 12 bits if filtering is selected in Bits FIL [1:0] of
the auxiliary ADC and power control register. The SigmaDSP
program reads this data as a 1.11 format data-word with a range
of 0 to 1.0. This data-word is mapped to the 5.23 format
Table 37.
D15
0
D14
0
D13
0
D12
0
D11
AA11
D10
AA10
D9
AA09
D8
AA08
D7
AA07
D6
AA06
D5
AA05
D4
AA04
D3
AA03
D2
AA02
D1
AA01
D0
AA00
Default
0x0000
parameter word with the four MSBs and 12 LSBs set to 0. A
full-scale code of 255 results in a value of 1.0. These registers
can be written to directly if the auxiliary ADC data registers
control port write mode (AACW) bit is set in the DSP core
control register.
Table 38.
Bit Name
AA [11:0]
Description
Auxiliary ADC output data, MSB first
Rev. 0 | Page 35 of 52