Datasheet

MAX5723/MAX5724/MAX5725
Ultra-Small, Octal-Channel, 8-/10-/12-Bit Buffered
Output DACs with Internal Reference and SPI Interface
22Maxim Integrated
Table 2. SPI Commands Summary (continued)
COMMAND B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 DESCRIPTION
LOAD_ALL 1 1 0 0 0 0 0 1 X X X X X X X X X X X X X X X X
Updates all DAC latches with current CODE register data
CODE_ALL LOAD_ALL
1 1 0 0 0 0 1 0
CODE REGISTER
DATA[11:4]
CODE REGISTER
DATA[3:0]
X X X X
Simultaneously writes data to the all CODE registers while updating all DAC registers
RETURN_ALL 1 1 0 0 0 0 1 1
RETURN REGISTER
DATA[11:4]
RETURN REGISTER
DATA[3:0]
X X X X
Writes data to all RETURN registers
SPI_DATA_ REQUEST
1 1 0 1 DAC Selection INC
DATA SEL [1:0]
00 = DAC
01 = CODE
10 = RET
11 = WDT
X X X X X X X X X X X X
Setup data request for readback. INC indicates if the DAC selection is incremented to the next DAC after each SPI_READ _DATA operation DATA SEL[1:0] indicates the data content to be read back
SPI_READ STATUS
1
1 1 0 0 0 X X X X X X X X X X X X X X X X X X
DPHA = 0 Readback status
1 1 1 0 0 1 X X X X X X X X X X X X X X X X X X
DPHA = 1 Readback status
SPI_READ DATA
1 1 1 0 1 0 X X X X X X X X X X X X X X X X X X
DPHA = 0 Readback requested data
1 1 1 0 1 1 X X X X X X X X X X X X X X X X X X
DPHA = 1 Readback requested data
NO OPERATION COMMANDS No Operation
1 1 0 0 0 1 X X X X X X X X X X X X X X X X X X
These commands will have no effect on the device, but will refresh
the watchdog timer if safety level is set to low.
1 1 0 0 1 0 X X X X X X X X X X X X X X X X X X
1 1 0 0 1 1 X X X X X X X X X X X X X X X X X X
Reserved Commands: Any commands not specifically listed above are reserved for Maxim internal use only.