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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HM17CM256 датащи(PDF) 37 Page - Hynix Semiconductor |
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HM17CM256 датащи(HTML) 37 Page - Hynix Semiconductor |
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37 / 111 page  HM17CM256 - 37 - ACCESS WITH 8 BIT BUS EXAMPLE : GRAY MODE , ACCESS UNDER (REF, SWAP)=(0, 0) (21) OSCILLATOR CIRCUIT HM17CM256 has the CR oscillator. The output of oscillator is used as the timing signal source of display and boosting clock to the booster. This is valid only in the master operation mode. When in the master operation mode and if external clock is used, feed the clock to OSC1 pin or connect resistor between OSC1 and OSC2. And feedback resistance with command can set the inner oscillator circuit of HM17CM256. The frame frequency can be altered by changed oscillator frequency according to feedback resistance length set value. To get optimum frame frequency, please check LCD and then set the frequency of oscillator. (22) POWER SUPPLY CIRCUIT Gradation palette GLSB circuit Gradation control circuit Latched data SEGSA0 SEGSB0 Palette Aj Palette Bj 0 0 1 0 0 SEGSC0 Palette Cj 1 1 1 MSB LSB MSB LSB MSB 0 0 1 0 0 1 1 1 D0 D1 D2 D3 D4 D5 D6 D7 0 j=0~7 CPU access data X address :00H Gradation palette Gradation control circuit SEGSA3 SEGSB3 Palette Aj Palette Bj 0 0 1 0 0 SEGSC3 Palette Cj 1 1 1 MSB LSB MSB LSB MSB 0 0 1 0 0 1 1 1 D0 D1 D2 D3 D4 D5 D6 D7 0 GLSB circuit j=0~7 CPU access data Latched data X address :03H |
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