PCF8531USLASH2 datasheet(16/44 Pages) PHILIPS

16 / 44 page

2000 Feb 11

Philips Semiconductors

Product speciﬁcation

× 128 pixel matrix driver

PCF8531

Table 5

Instruction set

Note

1. R/W is set in the slave address byte; Co and RS are set in the control byte.

INSTRUCTION

I2C-BUS

COMMAND(1)

I2C-BUS COMMAND BYTE

DESCRIPTION

R/W

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

H1 and H0 = don’t care (H independent command page)

NOP

00000000

no operation

Write data

write data to display RAM

Set default H[1:0]

0000001

select H[1:0] = 0

H1 = 0 and H0 = 0 (function and RAM command page)

Instruction set

00010

select command page

Function set

0100

power-down control;

entry mode

Set Y address of

RAM

01000

set Y address of RAM;

≤ Y ≤ 5

Set X address of

RAM

set X address part of

RAM; 0

≤ X ≤ 127

H1 = 0 and H0 = 1 (display setting command page)

Multiplex rate

00001

select multiplex rate

Display control

0001

set display conﬁguration

Bias system

0010

BS2

BS1

BS0 set Bias System (BSx)

H1 = 1 and H0 = 0 (HV-gen command page)

HV-gen control

00001

PRS HVE set VLCD programming

range

HV-gen

conﬁguration

000010

set voltage multiplication

factor

Temperature control

0100

TC2

TC1

TC0 set temperature

coefﬁcient

Test modes

XXXXX

do not use (reserved for

test)

VLCD control

VOP6 VOP5 VOP4 VOP3 VOP2 VOP1 VOP0 set VLCD register

≤ VOP ≤ 127

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