ADuCM310 Hardware Reference Manual
UG-549
Rev. C | Page 31 of 192
Bits
Bit Name
Description
Reset
Access
[9:5]
DIF2
Selects differential mode negative input for AIN2 in the sequence.
0x11
RW
0x11: Channel 2 is single-ended.
[4:0]
DIF0
Selects differential mode negative input for AIN0 in the sequence.
0x11
RW
0x11: Channel 0 is single-ended.
User Gain Adjust Register
Address: 0x40086090, Reset: Set during production testing, Name: ADCGN
Table 19. Bit Descriptions for ADCGN
Bits
Bit Name
Description
Reset
Access
[15:14]
RESERVED
Reserved.
0x0
R
[13:0]
GN
User gain register.
Set during
production
testing
RW
User Offset Adjust Register
Address: 0x40086094, Reset: 0x2000, Name: ADCOF
Table 20. Bit Descriptions for ADCOF
Bits
Bit Name
Description
Reset
Access
[13:0]
OF
User offset register.
0x2000
RW
Digital Comparator Configuration Register
Address: 0x40086098, Reset: 0x00000, Name: ADCCMP
Table 21. Bit Descriptions for ADCCMP
Bits
Bit Name
Description
Reset
Access
[17:2]
THR
Compare threshold. Value to compare to Channel 4 data.
0x0000
RW
1
DIR
Select comparator direction.
0x0
RW
0: ADCTH less than Channel 4 data.
1: ADCTH larger than Channel 4 data.
0
EN
Digital comparator enable.
0x0
RW
0: disable.
1: enable.
ADC Conversion Configuration Register
Address: 0x4008609C, Reset: 0x000A0014, Name: ADCCNVC
When ADCCP is set to 22 (temperature sensor), 25 (IOV
DD
/2), or 26 (AV
DD
/2), the ADCCNVC register automatically changes to
0x7D00FA − 80 kSPS for single conversions. Set ADCCNVC to the required conversion rate after sampling these three channels if a
different sample rate is required for other ADC input channels.
When the sequencer is enabled and includes any of these three channels, the value in ADCCNVC does not change and the ADC sampling
rate does not change.
Table 22. Bit Descriptions for ADCCNVC
Bits
Bit Name
Description
Reset
Access
[31:26]
Reserved
Write 0 to these bits.
0x0
RW
[25:16]
CNVD
Configure ADC acquisition time.
0x0A
RW
Acquisition time = CNVD/20 MHz.
Default acquisition time is 500 ns. For best SNR results, ensure that the
acquisition time is set to 1 µs (0x14) for ADC conversion rates ≤500 kSPS.
Set to 650 ns (0xD) for conversion rates >500 kSPS
[15:10]
Reserved
Do not overwrite.
0x0
RW
[9:0]
CNVC
Configure conversion frequency.
0x14
RW
Conversion frequency = 20 MHz/CNVC.
