MAX1620/MAX1621
Digitally Adjustable LCD Bias Supplies
______________________________________________________________________________________ 13
Reserved for future use.
DAC Register Data
Reserved for future use.
If the voltage applied to POK is
greater than 0.992V and the
MAX1621 is not shut down, this bit
returns 1; otherwise, it returns 0.
DESCRIPTION
—5
D4 (MSB)
D3
D2
D1
D0
4
3
2
1
0
—6
POK7
NAMEBIT
With SUS = high,
1 = LCD on, and
0 = LCD off.
DAC Input Data
With SUS = high,
1 = operating, and
0 = shutdown.
Register Select. A one in
this bit writes the next two
bits into the OPR register
and the remaining five bits
into the DAC register
(Figure 7).
DESCRIPTION
1OPR-LCDON5
1
0
0
0
0
D4 (MSB)
D3
D2
D1
D0
4
3
2
1
0
1
OPR-SHDN
6
—REGSEL7
NAME
POR
STATE*
BIT
Table 2. MAX1621 Configuration Byte
with REGSEL = 1 (write to OPR register)
*
Initial register state after power-up.
Table 3. MAX1621 Status Bits
With SUS = low,
1 = LCD on, and
0 = LCD off.
DAC Input Data
With SUS = low,
1 = operating, and
0 = shutdown.
Register Select. A zero in
this bit writes the next two
bits into the SUS register
and the remaining five bits
into the DAC register
(Figure 7).
DESCRIPTION
0
SUS-LCDON
5
1
0
0
0
0
D4 (MSB)
D3
D2
D1
D0
4
3
2
1
0
0
SUS-SHDN
6
—REGSEL7
POR
STATE*
BIT NAME
*
Initial register state after power-up.
Table 1. MAX1621 Configuration Byte
with REGSEL = 0 (write to SUS register)
