SBOS559
– MAY 2011
INPUT MODE REGISTER
Table 12. Input Mode Register (Address = 09h, Default = 00h)
BIT
NAME
TYPE
DESCRIPTION
When set to '1', CH0 and CH1 operate as a differential input.
0
Diff01
R/W
When set to '0', CH0 and CH1 operate as 2 single-ended inputs.
When bit 0 = '1', CH0 and CH1 differential inputs are setup in normal polarity mode when
1
Pol01
R/W
this bit is set to '1', and in reverse polarity mode when this bit is set to '0'.
When bit 0 is set to
“0”, this bit is ignored.
When set to '1', CH2 and CH3 operate as a differential input.
2
Diff23
R/W
When set to '0', CH2 and CH3 operate as 2 single-ended inputs.
When bit 0 = '1', CH2 and CH3 differential inputs are setup in normal polarity mode when
3
Pol23
R/W
this bit is set to '1', and in reverse polarity mode when this bit is set to '0'.
When bit 0 is set to
“0”, this bit is ignored.
When set to '1', CH4 and CH5 operate as a differential input.
4
Diff45
R/W
When set to '0', CH4 and CH5 operate as 2 single-ended inputs.
When bit 0 = '1', CH4 and CH5 differential inputs are setup in normal polarity mode when
5
Pol45
R/W
this bit is set to '1', and in reverse polarity mode when this bit is set to '0'.
When bit 0 is set to
“0”, this bit is ignored.
6
Reserved
R/W
'0' must be written to this bit.
7
Reserved
R/W
'0' must be written to this bit.
ADC CONTROL REGISTER
Table 13. ADC Control Register (Address = 0Ah, Default = 02h)
BIT
NAME
TYPE
DESCRIPTION
0
DR2
R/W
The 10-bit ADC conversion rate for the analog inputs is set as follows:
000 = 0.512 kHz
1
DR1
R/W
001 = 1 kHz
010 = 1.98 kHz
011 = 3.6 kHz
100 = 6.3 kHz
2
DR0
R/W
101 = 9.8 kHz
110 = 13.15 kHz
111 = 13.15 kHz
3
PGA2
R/W
The full-scale analog input range is set as follows:
000 = 2.56 V
4
PGA1
R/W
001 = VDD
010 = 4.096 V or VDD (whichever is less)
011 = 2.048 V
100 = 1.024 V
5
PGA0
R/W
101 = 0.512 V
110 = 0.256 V
111 = 0.256 V
6
Reserved
R/W
'0' must be written to this bit.
7
Reserved
R/W
'0' must be written to this bit.
Copyright
2011, Texas Instruments Incorporated
19
Product Folder Link(s):
AMC80