參數(shù)資料
型號(hào): S6B1741
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 128 SEG / 129 COM DRIVER %26 CONTROLLER FOR 4 GRAY SCALE STN LCD
中文描述: 賽格128/129 COM驅(qū)動(dòng)程序及4級(jí)灰度STN液晶顯示控制器
文件頁數(shù): 28/78頁
文件大?。?/td> 472K
代理商: S6B1741
S6B1741
128SEG/129COM DRIVER & CONTROLLER FOR STN LCD
24
Oscillator
This is on-chip Oscillator with external resistor. Its frequency is controlled by external resistor between OSC1 and
V
DD
. This oscillator signal is used in the voltage converter and display timing generation circuit.
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
128-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 a 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 11.
FR(Internal)
COM0
COM1
SEGn
127 128 1
2
3
4
5
6
7
8
9
10 11 12
121
1
2
3
4
5
6
CL(Internal)
V0
V1
V2
V3
V4
V
SS
V0
V1
V2
V3
V4
V
SS
V0
V1
V2
V3
V4
V
SS
M(Internal)
122 123 124 125 126 127 128
Figure 11. 2-frame AC Driving Waveform (Duty Ratio = 1/128)
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