PCF8820 datasheet(23/60 Pages) PHILIPS

23 / 60 page

2000 Dec 07

Philips Semiconductors

Product speciﬁcation

× 101 Grey-scale/ECB colour dot matrix

LCD driver

PCF8820

GR1, GR0

grey-scale register selection:

GS5 to GS0

0−

grey-scale level bits; in the reset state all 4 grey-scale registers are reset to 0;

see Section 8.1.8

DOF

display on/off

display on

display off: the state of the PCF8820 is equivalent to Power-down mode

(bit PD = 1). However, temperature measurement is still possible

drive of voltage multiplier

no direct drive

direct drive: VLCDOUT =VDD2; see Section 8.1.9

clock selection

internal clock

external clock

oscillator setting; see Section 8.1.10

stop calibration of frame frequency

start calibration of frame frequency

TRS

top rows

not swapped

swapped: the signals for row driver outputs R23 to R33 appear at outputs

R56 to R66, and the signals for row driver outputs R56 to R66 appear at

outputs R23 to R33

BRS

bottom rows

not swapped

swapped: the signals for row driver outputs R0 to R22 appear at outputs

R34 to R55, and the signals for row driver outputs R34 to R55 appear at outputs

R0 to R22

BIT

RESET

STATE

VALUE

FUNCTION

PCF8820 Datasheet(PDF) 23 Page - NXP Semiconductors

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