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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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AN2708 Datasheet(PDF) 19 Page - STMicroelectronics |
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AN2708 Datasheet(HTML) 19 Page - STMicroelectronics |
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19 / 42 page  AN2708 High-frequency ballast 19/42 Figure 8. Ballast controls timing chart On the slave unit the turning ON/OFF process is implemented by setting the pins PB3 (EN1) and PB4 (EN2) as output pull-up, while PB2 (ZCD) as output open drain. The three corresponding bits in the port data register are clear by software. To "switch on" the ballast, a pulse must be sent to PB4 (EN2 signal) and the third bit must be set in the port B (ZCD) data register. To "switch off" the ballast, a pulse must be sent to PB3 (EN1 signal) and the third bit must be cleared in the port B (ZCD signal) data register. Figure 9, 10, and 11 show the idle state and the turn-on/off commands. Vsupply EN1 LVG HVG EN2 ZCD GD TIME Latched Disable Forced Restart |
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