Sundance SMT943 - Manual (Page 39)

User Manual SMT943 Page 39 of 54 Last Edited: 23/08/2011 17:24:00
Setting Bit 2:0 Description Test Patterns ChA
0 ‘000’ Normal Mode of Operation
1 ‘001’ Outputs all zeroes
2 ‘010’ Outputs all ones
3 ‘011’ Outputs toggle pattern (0x1555 and 0x2AAA)
4 ‘100’ Outputs digital ramp (0->16383)
5 ‘101’ Outputs custom pattern
Setting Bit 13:8 Description Offset Pedestal ChA (Common)
0 ‘011111’ Pedestal=+31LSBs
1 ‘011110’ Pedestal=+30LSBs
2 … …
3 ‘000000’ Pedestal=0
4 … …
5 ‘111111’ Pedestal=-1LSB
6 ‘111110’ Pedestal=-2LSB
7 … …
8 ‘100000’ -32LSBs
ADC Chab Register 7 0x37.
ADC Chab Register 7 0x37
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Reserved Offset
Correctio
n Enable
ChB
Reserved
Default ‘0’ ‘0’ ‘000000’
1 Gain ChB (Common) Offset Correction Time Constant ChB
Default ‘0000’ ‘0000’
ADC Chab Register 7 0x37
Setting Bit 6 Description Offset Correction Enable ChB.
0 ‘0’ Offset Correction Disabled.
1 ‘1’ Offset Correction Enabled.
Setting Bit 11:8 Description Offset Correction Time Constant (number of clock cycles) ChB
0 ‘0000’ 256k
1 ‘0001’ 512k
2 ‘0010’ 1Meg
3 ‘0011’ 2Meg
4 ‘0100’ 4Meg
5 ‘0101’ 8Meg
6 ‘0110’ 16Meg
7 ‘0111’ 32Meg