PCF8820U Philips Semiconductors, PCF8820U Datasheet - Page 9

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

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V
V
state1
state2
V state1 (t)
V state1 (t)
V state2 (t)
V state2 (t)
ROW 0
ROW 0
R0(t)
R0(t)
ROW 1
ROW 1
R1(t)
R1(t)
COL 0
COL 0
C0(t)
C0(t)
COL 1
COL 1
C1(t)
C1(t)
(t) = C1(t)
(t) = C1(t)
V LCD
V LCD
V 2
V 2
V 3
V 3
V 4
V 4
V 5
V 5
V SS
V SS
V LCD
V LCD
V 2
V 2
V 3
V 3
V 4
V 4
V 5
V 5
V SS
V SS
V LCD
V LCD
V 2
V 2
V 3
V 3
V 4
V 4
V 5
V 5
V SS
V SS
V LCD
V LCD
V 2
V 2
V 3
V 3
V 4
V 4
V 5
V 5
V SS
V SS
V LCD
V LCD
V 3
V 3
V LCD
V LCD
0 V
0 V
V 3
V 3
V LCD
V LCD
V 3
V 3
V LCD
V LCD
0 V
0 V
V 3
V 3
V 2
V 2
V 2
V 2
Frame
Frame
R0(t)
R1(t)
V 2
V 2
V 2
V 2
x
x
0
0
x
x
4
4
7 9 16
7 9 16
0
0
1
1
2
2
N1 1
N1 1
66
66
Example for setting grey-scale register.
ROW0, COL0: GS = 17
ROW1, COL0: GS = 0
ROW0, COL1: GS = 30
ROW1, COL0: GS = 63 (63 will be set to 64; see Section 8.1.8).
Fig.3 Typical LCD driver waveforms at a multiplex rate of 1 : 67.
x
x
0
0
x
x
4
4
7 9 16
7 9 16
0
0
1
1
2
2
N1 2
N1 2
66
66
x
x
0
0
x
x
4
4
8 8 16
8 8 16
0
0
1
1
2
2
N1 3
N1 3
66
66
x
x
0
0
x
x
5
5
8 8 16
8 8 16
0
0
1
1
N1 4
N1 4
2
2
66
66
x
x
0
0
x
x
4
4
7 9 16
7 9 16
0
0
1
1
N2 1
N2 1
2
2
66
66
V 4
V 4
0 V
0 V
V 4
V 4
V 4
V 4
0 V
0 V
V 4
V 4
V LCD
V LCD
V LCD
V LCD
V 5
V 5
V 5
V 5
MGT115
MGT115
V 5
V 5
V LCD
V LCD
V 5
V 5
V LCD
V LCD
state1
state1
state2
state2