Newhaven Display International

NHD-12032

BZ

page address registers and then increments the column address register.

After loading a new address into the column address register one dummy read is required before

valid data is obtained.

Select ADC (A0H, A1H)

A0

E (RD)

R/W (/WR)

D7

D6

D5

D4

D3

D2

D1

D0

0

1

0

1

0

1

0

0

0

0

D

This command selects the relationship between display data RAM column addresses and

segment drivers.

D=1: SEG0← column address 4FH,…(inverted).

D=0: SEG0← column address 00H,…(normal).

This command is provided to reduce restrictions on the placement of driver ICs and routing of

traces during printed circuit board design. See Figure 2 go a table of segments and column

addresses for the two values of D.

Static drive ON/OFF (A4H, A5H)

A0

E (RD)

R/W (/WR)

D7

D6

D5

D4

D3

D2

D1

D0

0

1

0

1

0

1

0

0

1

0

D

Forces display on and all common outputs to be selected.

D=1:static drive on

D=0:static drive off

Select duty (A8H; A9H)

A0

E (RD)

R/W (/WR)

D7

D6

D5

D4

D3

D2

D1

D0

0

1

0

1

0

1

0

1

0

0

D

This command sets the duty cycle of the LCD drive and is only valid for the SED1520F and

SED1522F.it is invalid for the SED1521F, which performs passive operation. The duty cycle of

the SED1521F is determined by the externally generated FR signal.

SED1520

SED1522

D=: 1/32 duty cycle

1/16 duty cycle

D=: 1/16 duty cycle

1/8 duty cycle

When using the SED1520F0A, SED1522F0A (having a built-in oscillator) and the SED1521F0A

continuously, set the duty as follows:

SED1521FOA

1/32

1/32

SED1520FOA

1/16

1/16

1/116

1/32

SED1522FOA

1/8

1/16