PCF8566 datasheet(21/40 Pages) PHILIPS

21 / 40 page

1998 May 04

Philips Semiconductors

Product speciﬁcation

Universal LCD driver for low multiplex

rates

PCF8566

Table 5

Deﬁnition of PCF8566 commands

Table 6

LCD drive mode

COMMAND/OPCODE

OPTIONS

DESCRIPTION

Mode set

see Table 6

deﬁnes LCD drive mode

see Table 7

deﬁnes LCD bias conﬁguration

see Table 8

deﬁnes display status; the possibility to disable

the display allows implementation of blinking

under external control

see Table 9

deﬁnes power dissipation mode

Load data pointer

see Table 10

ﬁve bits of immediate data, bits P4 to P0, are

transferred to the data pointer to deﬁne one of

twenty-four display RAM addresses

Device select

1100

see Table 11

three bits of immediate data, bits A0 to A2, are

transferred to the subaddress counter to deﬁne

one of eight hardware subaddresses

Bank select

11110

see Table 12

deﬁnes input bank selection (storage of arriving

display data)

see Table 13

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

1110

BF1 BF0

see Table 14

deﬁnes the blinking frequency

see Table 15

selects the blinking mode; normal operation

with frequency set by bits BF1 and 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

BIT M1

BIT M0

Static (1 BP)

1 : 2 MUX (2 BP)

1 : 3 MUX (3 BP)

1 : 4 MUX (4 BP)

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