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| 型號(hào)： | GM2125 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | ANALOG INTER FACE XGA/SXGA ONPANEL LCD PANEL CONTROLLER |
| 中文描述： | 模擬國(guó)際米蘭的XGA / SXGA ONPANEL液晶顯示器控制器 |
| 文件頁(yè)數(shù)： | 49/54頁(yè) |
| 文件大?。?/td> | 1339K |
| 代理商： | GM2125 |
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***
Genesis Microchip Confidential ***
gm2115/25 Preliminary Data Sheet
June 2002
47
C2115-DAT-01B
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4.16.1 Power Down Operation
The gm2115/25 provides a low power state in which the clocks to selected parts of the chip may
be disabled (see Table 19).
4.16.2 Pulse Width Modulation (PWM) Back Light Control
Many of today’s LCD back light inverters require both a PWM input and variable DC
voltage to minimize flickering (due to the interference between panel timing and inverter’s
AC timing), and adjust brightness. Most LCD monitor manufacturers currently use a
microcontroller to provide these control signals. To minimize the burden on the external
microcontroller, the gm2115/25 generates these signals directly.
There are three pins available for controlling the LCD back light, PWM0 (GPIO0), PWM1
(GPIO1) and PWM2 (GPIO2). The duty cycle of these signals is programmable. They may
be connected to an external RC integrator to generate a variable DC voltage for a LCD back
light inverter. Panel HSYNC is used as the clock for a counter generating this output signal.
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