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| 型号： | GMZAN3T |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | XGA ALALOG INTERFACE LCD MONITOR CONTROLLER |
| 中文描述： | ALALOG的XGA液晶显示器接口控制器 |
| 文件页数： | 40/53页 |
| 文件大小： | 556K |
| 代理商： | GMZAN3T |
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gmZAN3 Preliminary Data Sheet
C0523-DAT-01G
45
July 2003
Ge nes i s Microc hip Confid e n tia l
http:// w ww . g enesis-mic r ochip.com
4.16 Miscellaneous Functions
4.16.1 Low Power State
The gmZAN3 provides a low power state in which the clocks to selected parts of the chip may be disabled (see
Table 22) and the ADC powered-off.
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 manufactures currently use a microcontroller to provide these control
signals. To minimize the burden on the external microcontroller, the gmZAN3 generates these signals
directly.
There are two pins available for controlling the LCD back light, PWM0/GPIO0 and PWM1/GPIO1. 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 or other applications. Panel HSYNC or
TCLK may be used as the clock for the counter generating this output signal.
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