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SA8807A 데이터시트(PDF) 6 Page - Sames |
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6 / 14 page SA8807A 6/14 sames PIN DESCRIPTION (Continued) Pin Pin PLCC-44 DIP-40 14 2 VS[20] LCD segment driver outputs 15 3 VS[21] 16 4 VS[22] 17 5 VS[23] 30 17 VR[0] LCD row driver outputs 31 18 VR[1] 32 19 VR[2] 33 20 VR[3] 29 16 NC Not connected 12 NC 24 NC 34 NC 44 NC Designation Description FUNCTIONAL DESCRIPTION The SA8807A is a CMOS Liquid Crystal Driver integrated circuit for displays having 3 or 4 track multiplexed backplanes and up to 96 LCD segments. Data exchange is performed through a Serial Peripheral Interface (SPI). 1. Serial Peripheral (SPI) Interface The SPI Interface is a 4 wire interface. The device transmits the data to the Master via MISO (Master In, Slave Out). Data from the Master is received through MOSI (Master Out, Slave In). The data is always synchronised to the Serial Clock (SCK), which is supplied from the Master. CE is a active high signal, the rising edge defining the start of a transfer procedure. The transfer procedure is terminated with the falling edge of CE. Diagram 1 illustrates the relationships between Clock, Data and Chip Enable signals. The SA8807A determines the clock polarity during the low to high transition of the CE signal. |
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