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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UPD16680 датащи(PDF) 14 Page - NEC |
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UPD16680 датащи(HTML) 14 Page - NEC |
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14 / 44 page  Data Sheet S12694EJ2V0DS00 14 µµµµPD16680 5.4 Setting BIAS value When internal driving circuit chosen, by connecting the interval of the pin VLCBS1, VLCBS2, VLCBS3 outside the IC, the bias value can be set from the 1/6 bias, the 1/7 bias, the 1/8 bias. Bias value Pin connection 1/8 bias VLCBS1, VLCBS2, VLCBS3 All open 1/7 bias To connect VLCBS1 and VLCBS2, or VLCBS2 and VLCBS3 1/6 bias To connect VLCBS1 and VLCBS3, VLCBS2 is open. 5.5 Voltage followers for level power supply By the input of AMPCHA pin, it controls voltage follower for the LCD drive level power supply. • LCD driving mode ( AMPCHA = L ) When this mode is chosen, The voltage follower maximizes electric current supply ability for LCD drive. It doesn't need to connect the external capacitor for the level stability. • Level capacitor mode ( AMPCHA = H ) When this mode is chosen, The voltage follower maximizes electric current supply ability for the external condenser charging. In this mode, it needs to connect the external capacitor ( 0.1 to 1.0 µF ) for the level stability. Caution When using this mode without connecting capacitor, the display dignity will be bad. |
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