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ST7632 Datasheet(PDF) 30 Page - Sitronix Technology Co., Ltd.

No. de pieza ST7632
Descripción Electrónicos  4K Color Dot Matrix LCD Controller/Driver
PDF  96 Pages
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Fabricante Electrónico  SITRONIX [Sitronix Technology Co., Ltd.]
Página de inicio  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST7632 Datasheet(HTML) 30 Page - Sitronix Technology Co., Ltd.

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ST7632
Ver 1.7
30/96
2006/08/15
7.8 Display Timing Generator Circuit
This circuit generates some signals to be used for displaying LCD. The display clock, CL (internal), generated by oscillation
clock, generates the clock for the line counter and the signal for the display data latch. The line address of on-chip RAM is
generated in synchronization with the display clock and the display data latch circuit latches the 132-bit display data in
synchronization with the display clock. The display data, which is read to the LCD driver, is completely independent of the
access to the display data RAM from the microprocessor. The display clock generates an LCD AC signal (M), which
enables the LCD driver to make an AC drive waveform, and also generates an internal common timing signal and start
signal to the common driver. The frame signal or the line signal changes the M by setting internal instruction. Driving
waveform and internal timing signal are shown in Figure 7.8.1.
FR(Internal)
M(Internal)
COM0
COM1
SEGn
CL(Internal)
V
1
V
2
V
3
V
4
V
SS
V
LCD
V
1
V
2
V
3
V
4
V
SS
V
LCD
V
1
V
2
V
3
V
4
V
SS
V
LCD
131 132
1
2
3
4
5
6
7
8
9
10
11
12
124 125 126 127 128 129 130 131 132 1
2
3
4
5
Figure 7.8.1 2-frame AC Driving Waveform (Duty Ratio: 1/132)
CL(Internal)
FR(Internal)
M(Internal)
COM0
COM1
SEGn
V
LCD
V
1
V
2
V
3
V
4
V
ss
V
LCD
V
1
V
2
V
3
V
4
V
ss
V
LCD
V
1
V
2
V
3
V
4
V
ss
131
132
1
2
3
4
5
6
7
8
9
10
11
12
4
3
2
1
132
131
130
129
128
127
126
125
124
123
Figure 7.8.2 N-Line Inversion Driving Waveform (N=5,Duty Ratio=1/132)



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