Digitally Adjustable LCD Bias Supplies

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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

POK

7

NAME

BIT

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

1

OPR-LCDON

5

1

0

0

0

0

D4 (MSB)

D3

D2

D1

D0

4

3

2

1

0

1

OPR-SHDN

6

—

REGSEL

7

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

—

REGSEL

7

POR

STATE*

BIT

NAME

*

Initial register state after power-up.

Table 1. MAX1621 Configuration Byte