PCF8579 datasheet(19/40 Pages) PHILIPS

19 / 40 page

1997 Apr 01

Philips Semiconductors

Product speciﬁcation

LCD column driver for dot matrix graphic

displays

PCF8579

Table 3 Deﬁnition of PCF8578/PCF8579 commands

COMMAND

OPCODE

OPTIONS

DESCRIPTION

SET MODE

M1 M0 see Table 4

deﬁnes LCD drive mode

see Table 5

deﬁnes display status

see Table 6

deﬁnes system type

SET START BANK

11111B1

see Table 7

deﬁnes pointer to RAM bank

corresponding to the top of the LCD;

useful for scrolling, pseudo motion and

background preparation of new display

DEVICE SELECT

110A3

see Table 8

four bits of immediate data, bits

A0 to A3, are transferred to the

subaddress counter to deﬁne one of

sixteen hardware subaddresses

RAM ACCESS

111G1 G0 Y1

see Table 9

deﬁnes the auto-increment behaviour of

the address for RAM access

see Table 10 two bits of immediate data, bits Y0 to Y1,

are transferred to the X-address pointer

to deﬁne one of forty display RAM

columns

LOAD X-ADDRESS C

see Table 11 six bits of immediate data, bits X0 to X5,

are transferred to the X-address pointer

to deﬁne one of forty display RAM

columns

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