PCF8549 datasheet(24/36 Pages) PHILIPS

24 / 36 page

1997 Nov 21

Philips Semiconductors

Product speciﬁcation

× 102 pixels matrix LCD driver

PCF8549

APPLICATION INFORMATION

Table 9

programming example for PCF8549

STEP

DISPLAY

OPERATION

DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

1I2C start

Slave address for write

Control byte with cleared CO bit

and D/C set to 0.

Function Set

PD = 0; V = 0; select extended

instruction set (H = 1 mode)

Set Bias System 2. This is the

recommended Bias System for a

multiplex rate 1:65

set VOP

VOP is set to a +16 × b [V].

Please note: The required

voltage is depending on the

liquid.

Function Set

PD = 0; V = 0; select normal

instruction set (H = 0 mode)

Display Control

set normal mode

(D = 1 and E = 0)

9I2C start

Restart: To write into the Display

RAM the D/C must be set to 1;

therefore a control byte is

needed.

Slave address for write

Control byte with cleared CO bit

and D/C set to 1.

Data Write

Y and X are initialized to 0 by

default, so they aren’t set here

Data Write

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