PCF8578USLASH2 datasheet(22/44 Pages) PHILIPS

22 / 44 page

1998 Sep 08

Philips Semiconductors

Product speciﬁcation

LCD row/column driver for dot matrix

graphic displays

PCF8578

Table 6

Deﬁnition of PCF8578/PCF8579 commands

COMMAND

OPCODE

OPTIONS

DESCRIPTION

SET MODE

E0 M1 M0 see Table 7

deﬁnes LCD drive mode

see Table 8

deﬁnes display status

see Table 9

deﬁnes system type

SET START BANK

B0 see Table 10

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

A0 see Table 11

four bits of immediate data, bits

A0 to A3, are transferred to the

subaddress counter to deﬁne one of

sixteen hardware subaddresses

RAM ACCESS

G1 G0 Y1

Y0 see Table 12

deﬁnes the auto-increment behaviour of

the address for RAM access

see Table 13

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

X0 see Table 14

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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