MAX549 MAXIM [Maxim Integrated Products], MAX549 Datasheet - Page 10

• Manufacturer Part Number: MAX549
• Description: +2.5V to +5.5V, Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in ?MAX Package
• Manufacturer: MAXIM [Maxim Integrated Products]

+2.5V to +5.5V, Low-Power, Single/Dual,
8-Bit Voltage-Output DACs in µMAX Package
Table 2. MAX548A Serial-Interface Programming Commands (continued)
COMMANDS FOR POWERING DOWN
X = Don’t care
10
COMMANDS POWERING DOWN AND LOADING INPUT REGISTER(S) ONLY
COMMANDS POWERING DOWN AND UPDATING DAC REGISTER(S)
COMMANDS POWERING DOWN AND UTILIZING THE ASYNCHRONOUS LOAD FUNCTION
UB1
X
X
X
X
X
X
X
X
X
X
X
X
______________________________________________________________________________________
UB2
X
X
X
X
X
X
X
X
X
X
X
X
UB3
CONTROL BYTE
X
X
X
X
X
X
X
X
X
X
X
X
Loaded First
C2
1
1
1
1
1
1
1
1
1
1
1
1
C1
0
0
0
1
1
1
1
1
1
1
1
1
C0
X
X
X
0
0
0
1
1
1
1
1
1
A1
0
1
1
0
1
1
0
1
1
0
1
1
A0
1
0
1
1
0
1
1
0
1
1
0
1
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
8-Bit DAC Data
Loaded Last
DATA BYTE
D7........D0
LDAC
Pin 6
X
X
X
X
X
X
0
0
0
1
1
1
Load DAC A input register and power down DAC
A. DAC B registers unchanged.
Load DAC B input register and power down DAC
B. DAC A registers unchanged.
Load both DAC input registers and power down
both DACs. Both DAC registers unchanged
Load DAC A input register, power down DAC A,
and update both DAC registers. DAC B input
register unchanged.
Load DAC B input register, power down DAC B,
and update both DAC registers. DAC A input
register unchanged.
Load both DAC input registers, power down both
DACs, and update both DAC registers.
Load DAC A input register, power down
DAC A, and update both DAC registers. DAC B
input register unchanged.
Load DAC B input register, power down
DAC B, and update both DAC registers. DAC A
input register unchanged.
Load both DAC input registers and power down
both DACs. Update both DAC registers.
Load DAC A input register and power down DAC
A. While powered down, on LDAC’s falling edge,
update both DAC registers. DAC B input register
unchanged.
Load DAC B input register and power down DAC
B. While powered down, on LDAC’s falling edge,
update both DAC registers. DAC A input register
unchanged.
Load both DAC input registers and power down
both DACs. While powered down, on LDAC’s
falling edge, update both DAC registers.
(Commands executed on CS’s rising edge)
COMMAND