pcf8811 NXP Semiconductors, pcf8811 Datasheet - Page 11

• Manufacturer Part Number: pcf8811
• Description: 80 X 128 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9.1.2
9.1.2.1
Two different addressing modes are possible with the
extended command set: horizontal addressing mode and
vertical addressing mode.
In the horizontal addressing mode (V = 0) the X address
increments after each byte. After the last X address,
X wraps around to 0 and Y increments to address the next
row (see Fig.4). The number of columns (last X address)
after which the wrap around must occur can be
programmed. In Fig.4 it can be seen that the X address is
programmed to be 127, and the Y address is programmed
to be 9. With X max and Y max the X and Y addresses can
be programmed while the whole RAM is not being used.
2004 May 17
handbook, full pagewidth
80
Fig.4 Sequence of writing data bytes into RAM with horizontal addressing (V = 0) (extended command set).
E
128 pixels matrix LCD driver
XTENDED COMMAND SET
Horizontal/vertical addressing
1024 1025 1026
1152 1153 1154
128
256
384
512
640
768
896
0
0
129
257
385
513
641
769
897
1
130
258
386
514
642
770
898
2
X address
11
In the vertical addressing mode (V = 1) the Y address
increments after each byte. After the last Y address
(Y = 9), Y wraps around to 0 and X increments to address
the next column (see Fig.5). The last Y address after which
Y wraps to 0 can be programmed. In Fig.5 it can be seen
that the X address is programmed to be 127, and the
Y address is programmed to be 9. With X max and Y max
the X and Y addresses can be programmed while the
whole RAM is not being used.
After the very last address the address pointers wrap
around to address X = 0 and Y = 0 in both horizontal and
vertical addressing modes.
1279
127
Y address
MGW736
0
9
Product specification
PCF8811