PCF2105 データシートの表示（PDF） - Philips Electronics
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PCF2105 Datasheet PDF : 48 Pages
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Philips Semiconductors
LCD controller/driver
Product specification
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.
handbook, full pagewidth
display position
DDRAM address
1 2 3 4 5 6 7 8 9 10 11 12
00 01 02 03 04 05 06 07 08 09 0A 0B
display position
DDRAM address
13 14 15 16 17 18 19 20 21 22 23 24
0C 0D 0E 0F 10 11 12 13 14 15 16 17
MLB899
Fig.10 DDRAM-to-display mapping; no shift.
handbook, full pagewidth
display position
DDRAM address
1 2 3 4 5 6 7 8 9 10 11 12
4F 00 01 02 03 04 05 06 07 08 09 0A
display position
DDRAM address
13 14 15 16 17 18 19 20 21 22 23 24
0B 0C 0D 0E 0F 10 11 12 13 14 15 16
MLB900
Fig.11 DDRAM-to-display mapping; right shift.
handbook, full pagewidth
display position
DDRAM address
1 2 3 4 5 6 7 8 9 10 11 12
01 02 03 04 05 06 07 08 09 0A 0B 0C
1998 Jul 30
display position
DDRAM address
13 14 15 16 17 18 19 20 21 22 23 24
0D 0E 0F 10 11 12 13 14 15 16 17 18
MLB901
Fig.12 DDRAM-to-display mapping; left shift.
15
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