PCF8820 datasheet(20/60 Pages) PHILIPS

20 / 60 page

2000 Dec 07

Philips Semiconductors

Product speciﬁcation

× 101 Grey-scale/ECB colour dot matrix

LCD driver

PCF8820

Notes

1. Bit R/W is set in the slave address byte; bit RS is set in the control byte.

2. X = don’t care.

Display part

0001000

DP2

DP1

DP0

set display for partial screen

mode

HVGen command page (H2 = 0, H1 = 1, H0 =0)

High voltage

generator

control

00000001

PRS

HVE

set VLCDOUT programming

range and high voltage

generator on

High voltage

generator

conﬁguration

0000001

set voltage multiplier factor

Temperature

control

0000010

TC2

TC1

TC0

set temperature coefﬁcient

Temperature

measurement

control

000010000

start temperature

measurement

VLCD control

VOP6 VOP5 VOP4 VOP3 VOP2 VOP1

VOP0

set VLCD register value:

≤ VOP ≤ 127

Grey-scale/colour command page (H2 = 0, H1 = 1, H0 =1)

Grey-scale

00010000

GR1

GR0

select grey-scale register:

≤ GR ≤ 3

Grey-scale level

control

0010

GS5

GS4

GS3

GS2

GS1

GS0

set grey-scale register value:

≤ GS ≤ 63

Special feature command page (H2 = 1, H1 = 0, H0 =0)

Display off,

direct drive

mode

00000001

DOF

display off; voltage multiplier

in direct drive mode

Oscillator setting

00000010

select external clock; start

oscillator calibration

Row block

swapping

00010

TRS

BRS

top row swap; bottom row

swap

INSTRUCTION

CONTROL

BITS(1)

COMMAND BYTE

DESCRIPTION

R/W

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

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