PCF8533 datasheet(22/36 Pages) PHILIPS

22 / 36 page

1999 Jul 30

Philips Semiconductors

Product speciﬁcation

Universal LCD driver for low multiplex rates

PCF8533

Table 5

Deﬁnition of PCF8533 commands

Table 6

Mode set option 1

Table 7

Mode set option 2

Table 8

Mode set option 3

COMMAND

OPCODE

OPTIONS

DESCRIPTION

MODE SET

Table 6

deﬁnes LCD drive mode

Table 7

deﬁnes LCD bias conﬁguration

Table 8

deﬁnes display status; the possibility to

disable the display allows implementation of

blinking under external control

LOAD DATA

POINTER

Table 9

seven bits of immediate data, bits P6 to P0,

are transferred to the data pointer to deﬁne

one of eighty display RAM addresses

DEVICE

SELECT

Table 10

three bits of immediate data, bits A0 to A3,

are transferred to the subaddress counter to

deﬁne one of eight hardware subaddresses

BANK

SELECT

Table 11

deﬁnes input bank selection (storage of

arriving display data)

Table 12

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

Table 13

deﬁnes the blinking frequency

Table 14

selects the blinking mode; normal operation

with frequency set by BF1, BF0 or blinking by

alternation of display RAM banks. Alternation

blinking does not apply in 1 : 3 and 1 : 4

multiplex drive modes

LCD DRIVE MODE

BITS

DRIVE MODE

BACKPLANE

Static

1 BP

1 : 2

MUX (2 BP)

1 : 3

MUX (3 BP)

1 : 4

MUX (4 BP)

LCD BIAS

BIT B

⁄3bias

⁄2bias

DISPLAY STATUS

BIT E

Disabled (blank)

Enabled

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