PCF8531 datasheet(37/44 Pages) NXP

37 / 44 page

PCF8531_4

Product data sheet

Rev. 04 — 13 June 2008

37 of 44

NXP Semiconductors

PCF8531

34 x 128 pixel matrix driver

15.3 Programming example

Table 17.

Programming example for PCF8531

Step

Serial bus byte

Display

Operation

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

11110SA0

start; slave address; R/W=0

0000000

control byte; Co = 1; RS = 0

0000001

H[1:0] independent

command; select function

and RAM command page

(H[1:0] = 00)

0000000

control byte; Co = 1; RS = 0

0100010

function and RAM command

page PD = 0 and V = 1

0000000

control byte; Co = 1; RS = 0

0001001

function and RAM command

page select display setting

command page H[1:0] = 01

0000000

control byte; Co = 1; RS = 0

0001100

display setting command

page; set normal mode

(D = 1; IM = 0 and E = 0)

10000000

control byte; Co = 1; RS = 0

00000101

select multiplex rate 1:34

10000000

control byte; Co = 1; RS = 0

00000001

H[2:0] independent

command; select function

and RAM command page

H[1:0] = 00

10000000

control byte; Co = 1; RS = 0

00001010

function and RAM command

page; select HV-gen

command page H[1:0] = 10

10000000

control byte; Co = 1; RS = 0

00001011

HV-gen command page;

select voltage multiplication

factor 5 S[1:0] = 11

10000000

control byte; Co = 1; RS = 0

00100010

HV-gen command page;

select temperature

coefﬁcient 2 TC[2:0] = 010

10000000

control byte; Co = 1; RS = 0

00000111

HV-gen command page;

select high VLCD

programming range

(PRS = 1); voltage multiplier

off (HVE = 1)

10000000

control byte; Co = 1; RS = 0

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