PCF8811USLASH2DASLASH1 datasheet(32/73 Pages) PHILIPS

32 / 73 page

2004 May 17

Philips Semiconductors

Product speciﬁcation

× 128 pixels matrix LCD driver

PCF8811

13.1.3

SPECIFIC COMMANDS OF THE EXTENDED COMMAND SET

Table 14 Explanation of symbols

Note

1. It is strongly recommended to use the p = 4 setting.

BIT

LOGIC 0

LOGIC 1

RESET STATE

VPR[7:6] + VPR[5:0]

programming value of VLCD

00000000

FR[1:0]

frame-rate frequency

TC[2:0]

temperature coefﬁcient

(TC2) 010

horizontal addressing

vertical addressing

DOR

LSB at top

MSB at top

no Icon row (1/16 to 1/80)

Icon row (1/16 to 1/80)

BRS

bottom rows are not

mirrored

bottom rows are mirrored

MP(1)

mux rate driven p value

(automatic)

p = 4 selected for mux rate

1 : 64 and 1 : 80

use internal oscillator

use external oscillator

S[2:0]

charge pump multiplication factor

100

Table 15 Frame-rate frequency

Table 16 Temperature coefﬁcient

Table 17 Multiplication settings

13.2

Initialization

Reset is accomplished by applying an external reset pulse

(active LOW) at pad RES. When reset occurs within the

specified time, all internal registers are reset, however the

RAM is still undefined. The state after reset is described in

Section 13.3. Pad RES must be

≤0.3VDD1 when VDD1

reaches VDD(min) (or higher) within a maximum time tVHRL

after VDD1 goes high (see Fig.43).

A reset can also be achieved by sending a reset

command. This command can be used during normal

operation but not to initialize the chip after power-on.

FR[1:0]

FRAME-RATE

FREQUENCY

30 Hz

40 Hz

50 Hz

60 Hz

TC[2:0]

TEMPERATURE

COEFFICIENT

000

001

010

011

100

101

110

111

S[2:0]

DESCRIPTION

000

× voltage multiplier

001

× voltage multiplier

010

× voltage multiplier

011

× voltage multiplier

100

× voltage multiplier

101

× voltage multiplier

110

× voltage multiplier

111

× voltage multiplier

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