Sundance SMT381 2004 - Manual (Page 72)

Figure 63. DAC serial write operation.
Figure 64. DAC serial read operation.
The DAC serial set up firmware uses four registers to interact with the DAC via the 4-
wire serial control. The registers are DACSerialSetupReg, DACSerialAddr,
DACDataReg and SerialOutReg. The first register is 3 bits long and influences the
behaviour of the state machine. There are three options for this register to be
configured which is shown in the table below.
Bit 2 Bit 1 Bit 0
No of Address and Data bits the state
machine will clock out
0 X W/R
10 Address bits
28 Data bits
1 0 W/R
7 Address bits
28 Data bits