PCF8820U Philips Semiconductors, PCF8820U Datasheet - Page 14

• Manufacturer Part Number: PCF8820U
• Description: 67 x 101 Grey-scale/ECB colour dot matrix LCD driver
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Bit V (see Table 3) selects either horizontal or vertical
address mode:
2000 Dec 07
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handbook, full pagewidth
In vertical address mode (bit V = 1), the Y-address is
incremented after each byte (see Fig.9). After Y = 16,
the Y-address sequence returns to Y = 0 and the
X-address is incremented to address the next column.
In horizontal address mode (bit V = 0) the X-address is
incremented after each byte (see Fig.10). After X = 100,
the X-address sequence returns to X = 0 and the
Y-address is incremented to address the next row.
67 101 Grey-scale/ECB colour dot matrix
LCD driver
1414
1515
1616
101
202
303
404
13
14
15
16
0
1
2
3
0
0
0
Fig.10 Writing data to RAM sequence in horizontal address mode.
Fig.9 Writing data to RAM sequence in vertical address mode.
102
203
304
17
18
19
20
1
2
3
4
X address
X address
5
14
After the very last address (X = 100 and Y = 16), the
address pointers return to the first address (X = 0 and
Y = 0). It should be noted that in bank 16 only
bits DB0 to DB5 of the data will be written into the RAM.
1716
1716
100
100
201
100
Y address
Y address
16
16
0
0
MGT121
MGT122
Product specification
PCF8820