PCF8576DT datasheet(23/41 Pages) PHILIPS

23 / 41 page

2004 Dec 22

Philips Semiconductors

Product speciﬁcation

Universal LCD driver for low

multiplex rates

PCF8576D

MSA833

REST OF OPCODE

MSB

LSB

Fig.18 Format of command byte.

C = 0 = last command.

C = 1 = commands continue.

Table 4

Deﬁnition of PCF8576D commands

Note

1. Not used.

COMMAND

OPCODE

OPTIONS

DESCRIPTION

MODE SET

(1)

Table 5

Deﬁnes LCD drive mode.

Table 6

Deﬁnes LCD bias conﬁguration.

Table 7

Deﬁnes display status; the possibility to

disable the display allows implementation

of blinking under external control.

LOAD DATA

POINTER

Table 8

Six bits of immediate data, bits P5 to P0,

are transferred to the data pointer to

deﬁne one of forty display RAM

addresses.

DEVICE

SELECT

1100A2

Table 9

Three bits of immediate data, bits A0 to

A2, are transferred to the subaddress

counter to deﬁne one of eight hardware

subaddresses.

BANK

SELECT

11110I

Table 10

Deﬁnes input bank selection (storage of

arriving display data).

Table 11

Deﬁnes output bank selection (retrieval of

LCD display data); the BANK SELECT

command has no effect in 1 : 3 and 1 : 4

multiplex drive modes.

BLINK

1110A

BF1 BF0 Table 12

Deﬁnes the blink frequency.

Table 13

Selects the blink mode; normal operation

with frequency set by BF1, BF0 or blinking

by alternating display RAM banks;

alternating RAM bank blinking does not

apply in 1 : 3 and 1 : 4 multiplex drive

modes.

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