PCF8579 datasheet(18/41 Pages) NXP

18 / 41 page

PCF8579_5

Product data sheet

Rev. 05 — 11 May 2009

18 of 41

NXP Semiconductors

PCF8579

LCD column driver for dot matrix graphic displays

[1]

Useful for scrolling, pseudo-motion and background preparation of new display content.

[1]

Values shown in decimal.

Table 8.

Set-mode - command bit description

Bit

Symbol

Value

Description

0, 1

see Table 7

6, 5

ﬁxed value

display mode

PCF8578 row only

PCF8578 mixed mode

3, 2

E[1:0]

display status

blank

normal

all segments on

inverse video

1, 0

M[1:0]

LCD drive mode

1:8 MUX (8 rows)

1:16 MUX (16 rows)

1:24 MUX (24 rows)

1:32 MUX (32 rows)

Table 9.

Set-start-bank - command bit description

Bit

Symbol

Value

Description

0, 1

see Table 7

6 to 2

11111

ﬁxed value

1, 0

B[1:0]

start bank pointer (see Figure 18)[1]

bank 0

bank 1

bank 2

bank 3

Table 10.

Device-select - command bit description

Bit

Symbol

Value

Description

0, 1

see Table 7

6 to 4

110

ﬁxed value

3 to 0

A[3:0]

0 to 15[1]

hardware subaddress;

4 bit binary value; transferred to the subaddress

counter to deﬁne one of sixteen hardware

subaddresses

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