Sundance SMT942 - Manual (Page 38)

User Manual SMT942 Page 38 of 55 Last Edited: 23/08/2011 17:25:00
DAC Chab Register 0 0x40.
DAC Chab Register 0 0x40
Byte Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
1 Reserv
ed
Clk1_in_e
na
Clk1c_in_ena Reserved Fir4_en qmc_offset_en
a
qmc_corr_en
a
mixer_en
a
Default ‘1’ ‘1’ ‘1’ ‘0’ ‘0’ ‘0’ ‘0’ ‘0’
0 insel_mode Reserved Synchr_c
lkin
Twos inv_clk interp_value
Default ‘00’ ‘0’ ‘0’ ‘0’ ‘0’ ‘00’
DAC Chab Register 0 0x40
Setting Bit 1:0 Description interpolation value
0 00 1x.
1 01 2x.
2 10 4x.
3 11 8x.
Setting Bit 2 Description inv_clk
0 0 Input clock not inverted.
1 1 Input clock inverted.
Setting Bit 2 Description twos
0 0 Binary format
1 1 Two’s complement format.
Setting Bit 2 Description synchr_clkin
0 0 Synchronous mode off.
1 1 Synchronous mode on. Clk1 and Clk2 must synchronous in phase and frequency when
reaching the DAC
Setting Bit 7:6 Description insel mode
0 00 Normal input on Port A and Port B.
1 01 Interleaved input on Port A.
2 10 Interleaved input on Port B.
3 11 Half rate on Port A and B.
Setting Bit 8 Description mixer_ena
0 0 Mixer bypassed.
1 1 Mixer enabled.
Setting Bit 9 Description qmc_corr_ena
0 0 QMC phase and gain correction bypasses.
1 1 QNC phase and gain correction enabled.
Setting Bit 10 Description qmc_offset_ena
0 0 QMC offset correction bypasses.
1 1 QNC offset correction enabled.
Setting Bit 11 Description fir4_ena
0 0 Filter bypassed.
1 1 FIR4 Inverse Sinc filter enabled.