PCF2105MUSLASH2 datasheet(15/48 Pages) PHILIPS

15 / 48 page

1998 Jul 30

Philips Semiconductors

Product speciﬁcation

LCD controller/driver

PCF2105

8.14

Programming of the MUX rate 1 : 16

With the MUX rate 1 : 16 the PCF2105 can be used in the

following ways:

• To drive a 1-line display of 24 characters

• To drive a 2-line display of 12 characters, resulting in

better contrast. The internal data flow of the chip is

optimized for this purpose.

To program the MUX rate 1 : 16, bits M and N of the

‘function set’ instruction must be set to logic 0

(see Table 3). Figures 10, 11 and 12 show the DDRAM

addresses of the display characters. The second row of

each figure corresponds to either the right half of a 1-line

display or to the second line of a 2-line display. Wrap

around of data during display shift or when writing data is

non-standard.

Fig.10 DDRAM-to-display mapping; no shift.

handbook, full pagewidth

MLB899

display position

DDRAM address

display position

DDRAM address

Fig.11 DDRAM-to-display mapping; right shift.

handbook, full pagewidth

MLB900

display position

DDRAM address

display position

DDRAM address

Fig.12 DDRAM-to-display mapping; left shift.

handbook, full pagewidth

MLB901

display position

DDRAM address

display position

DDRAM address

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