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SA8807A Datasheet(PDF) 11 Page - Sames |
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SA8807A Datasheet(HTML) 11 Page - Sames |
11 / 14 page SA8807A sames 11/14 5. On-Chip LCD Voltage Divider Disable The integrated divider for the LCD voltages can be disabled by applying a high level on the EN input (EN = 1). 6. Contrast Setting The contrast may be adjusted by applying an external LCD voltage on input V1, with the internal voltage divider activated. 7. Oscillator The on-chip oscillator circuit requires one external capacitor for operation. The capacitor value is calculated as follows: C = 7µF.1Hz/f f = Required oscillator frequency The backplane multiplex rate is f/8 for 4-backplane mode and f/6 for 3-backplane mode. TYPICAL APPLICATION The Application Circuit (Figure 1) shows the connections for a typical application when using a 12 digit (7 segment) display, plus decimal points. |
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