Sundance SMT941 - Manual (Page 34)

User Manual SMT941 Page 34 of 43 Last Edited: 23/08/2011 17:24:00
ADC Chcd Register 1 0x41
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 Reserved Reference Reserved Standby Reserved
Default ’0’ ‘00’ ‘000’ ‘0’ ‘0’
1 Reserved PowerDownModes
Default ‘0000’ ‘0000’
ADC Chcd Register 1 0x41
Setting Bit 1 Description Standby.
0 ‘0’ Normal mode of operation.
1 ‘1’ Both ADC channels are put into standby mode (internal ref and output buffers still
active).
Setting Bit 6:5 Description Reference.
0 ‘01’ Internal Reference enabled.
1 ‘11’ External Reference enabled.
Setting Bit 11:8 Description Power down modes.
0 ‘0000’ Pins ctrl1, 2 and 3 determine power down modes.
1 ‘1000’ Normal mode of operation.
2 ‘1001’ Output buffers disabled for channelB.
3 ‘1010’ Output buffers disabled for channelA.
4 ‘1011’ Output buffers disabled for channelA and B.
5 ‘1100’ Global power down.
6 ‘1101’ ChannelB in standby.
7 ‘1110’ ChannelA in standby.
ADC Chcd Register 2 0x42.
ADC Chcd Register 2 0x42
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0 LVDS_CM
OS
Reserved
Default ’0’ ‘0000000’
1 Clock Edge Control (rising edge) Clock Edge Control (falling edge) Reserved
Default ‘000’ ‘000’ ‘00’
ADC Chcd Register 2 0x42
Setting Bit 7 Description LVDS_CMOS
0 ‘0’ Parallel CMOS interface.
1 ‘1’ DDR LVDS interface.
Setting Bit 12:10 Description Clock output Edge control (falling edge)
0 ‘000’,’100’ Default output clock position.
1 ‘101’ Falling edge shifted by +(4/26)/Sampling Frequency
2 ‘110’ Falling edge shifted by -(6/26)/Sampling Frequency