Datasheet

AD7176-2 Data Sheet
Rev. A | Page 58 of 68
SETUP CONFIGURATION REGISTER 2
Address: 0x22, Reset: 0x1020, Name: SETUPCON2
The Setup Configuration Registers are 16-bit registers that configure the reference selection and output coding of the ADC.
Table 36. Bit Descriptions for SETUPCON2
Bits Bit Name Settings Description Reset Access
[15:13] RESERVED These bits are reserved and should be set to 0. 0x0 R
12 BI_UNIPOLAR2 This bit sets the output coding of the ADC for Setup 2. 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_SEL2 These bits allow you to select the reference source for ADC conversion on
Setup 2.
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 3
Address: 0x23, Reset: 0x1020, Name: SETUPCON3
The Setup Configuration Registers are 16-bit registers that configure the reference selection and output coding of the ADC.
Table 37. Bit Descriptions for SETUPCON3
Bits Bit Name Settings Description Reset Access
[15:13] RESERVED These bits are reserved and should be set to 0. 0x0 R
12
BI_UNIPOLAR3
This bit sets the output coding of the ADC for Setup 3.
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_SEL3 These bits allow you to select the reference source for ADC conversion on
Setup 3.
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