PCF8548 datasheet(26/40 Pages) PHILIPS

26 / 40 page

1999 Aug 16

Philips Semiconductors

Product speciﬁcation

× 102 pixels matrix LCD driver

PCF8548

18 APPLICATION INFORMATION

Table 7

Programming example for PCF8548

STEP

BITS

DISPLAY

OPERATION

1I2C-bus start

1111000

slave address for write

0000000

control byte with cleared Co

bit and D/C set to logic 0

0100001

function set; PD = 0; V = 0;

select extended instruction

set (H = 1 mode)

0010010

set bias system 2; this is the

recommended bias system

for a multiplex rate1:65

1101010

set VOP; VOP is set to a

+106

× b [V]; it should be

noted that the required

voltage is dependent on the

liquid

0100000

function set; PD = 0; V = 0;

select normal instruction set

(H = 0 mode)

0001100

display control; set normal

mode (D = 1; E = 0)

9I2C-bus start

restart; to write into the

display RAM the D/C must

be set to logic 1; therefore a

control byte is needed

01111000

slave address for write

01000000

control byte with cleared Co

bit and D/C set to logic 1

11111000

data write; Y and X are

initialized to 0 by default, so

they are not set here

10100000

data write

MGS405

MGS406

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