Datasheet

Data Sheet AD7176-2
Rev. A | Page 57 of 68
SETUP CONFIGURATION REGISTER 0
Address: 0x20, Reset: 0x1020, Name: SETUPCON0
The Setup Configuration Registers are 16-bit registers that configure the reference selection and output coding of the ADC.
Table 34. Bit Descriptions for SETUPCON0
Bits Bit Name Settings Description Reset Access
[15:13] RESERVED These bits are reserved and should be set to 0. 0x0 R
12 BI_UNIPOLAR0 This bit sets the output coding of the ADC for Setup 0. 0x1 RW
0 Unipolar coded output
1 Offset binary coded output
[11:6]
RESERVED
These bits are reserved and should be set to 0.
0x00
R
[5:4] REF_SEL0 These bits allow you to select the reference source for ADC conversion on
Setup 0.
0x2 RW
00
External Reference.
10 Internal 2.5 V Reference. This must also be enabled in the ADC Mode Register.
11 AVDD1 − AVSS. This can be used to as a diagnostic to validate other
reference values.
[3:0] RESERVED These bits are reserved and should be set to 0. 0x0 R
SETUP CONFIGURATION REGISTER 1
Address: 0x21, Reset: 0x1020, Name: SETUPCON1
The Setup Configuration Registers are 16-bit registers that configure the reference selection and output coding of the ADC.
Table 35. Bit Descriptions for SETUPCON1
Bits Bit Name Settings Description Reset Access
[15:13] RESERVED These bits are reserved and should be set to 0. 0x0 R
12
BI_UNIPOLAR1
This bit sets the output coding of the ADC for Setup 1.
0x1
RW
0 Unipolar coded output
1 Offset binary coded output
[11:6] RESERVED These bits are reserved and should be set to 0. 0x00 R
[5:4] REF_SEL1 These bits allow you to select the reference source for ADC conversion on
Setup 1.
0x2 RW
00 External Reference
10 Internal 2.5 V Reference. This must also be enabled in the ADC Mode Register.
11 AVDD1 − AVSS. This can be used to as a diagnostic to validate other
reference values.
[3:0] RESERVED These bits are reserved and should be set to 0. 0x0 R