Production Data
WM2610
DAC A TO H CODE REGISTERS
Addresses 0 to 7 are the DAC registers. The data written to these registers is transferred to the
respective DAC when the LOADB input (pin 18) is low. For instantaneous updating, LOADB can be
held low permanently.
CONTROL REGISTER 0
Control register 0 (address 8) is used to select functions that apply to the whole IC, such as Power
Down and Data Input Format.
BIT
D11
X
D10
X
D9 D8 D7 D6 D5
D4
PD
0
D3
DO
0
D2
X
D1
X
D0
IM
0
Function
Default
X
X
X
X
X
X
X
X
X
X
X
X
0
0
Table 5 Register Map
BIT
DESCRIPTION
0
1
PD
Full device Power Down
DOUT Enable
Input Mode
Normal
Disabled
Power Down
Enabled
DO
IM
Straight Binary
Two’s Complement
X
Reserved
Table 6 Register Map
CONTROL REGISTER 1
Control register 1 (address 9) is used to power down individual pairs of DACs and select their settling
time. Powering down a pair of DACs disables their amplifiers and reduces the power consumption of
the device. The settling time in fast mode is typically 1µs. In slow mode, the settling time is typically
3µs and power consumption is reduced.
BIT
D11
X
D10
X
D9 D8 D7 D6 D5
D4
D3
SGH
0
D2
SEF
0
D1
SCD
0
D0
SAB
0
Function
Default
X
X
X
X
PGH PEF PCD PAB
X
X
0
0
0
0
Table 7 Register Map
BIT
DESCRIPTION
Power Down DACs X and Y
Speed Setting for DACs X and Y
0
1
PXY
Normal
Slow
Power Down
Fast
SXY
Table 8 Register Map
DAC PRESET REGISTER
The Preset register (address 10) makes it possible to update all eight DACs at the same time. The
value stored in this register becomes the digital input to all the DACs when the asynchronous PREB
input (pin 5) is driven low. If no data has previously been written to the preset register, all DACs are
set to zero scale.
TWO-CHANNEL REGISTERS
The two-channel registers (addresses 12 to 15) provide a ‘differential output’ function where writing
data to one DAC will automatically write the complement to the other DAC in the pair. For example,
writing a hexadecimal value of FFFF to address 12 will set DAC A to full scale and DAC B to zero
scale.
WOLFSON MICROELECTRONICS LTD
PD Rev 1.0 February 2001
11
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
