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S6C1652 Datasheet(PDF) 8 Page - Samsung semiconductor |
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S6C1652 Datasheet(HTML) 8 Page - Samsung semiconductor |
8 / 19 page S6C1652 6 BIT 300 / 309 CHANNEL TFT-LCD SOURCE DRIVER 8 OPERATION DESCRIPTION DISPLAY DATA TRANSFER When DIO1 (or DIO2) pulse is loaded into internal latch on the rising edge of CLK2, DIO1 (or DIO2) pulse enables the data transfer operation. After the falling edge of DIO1 (or DIO2), display data is valid on the rising edge of CLK2. Once all the data of 300 / 309 channels are loaded into internal latch, it goes into stand-by state automatically, and any new data is not accepted even though CLK2 is provided until next DIO1 (or DIO2) input. When next DIO1 (or DIO2) is provided, new display data is valid on the next rising edge of CLK2 after the falling edge of DIO1 (or DIO2). EXTENSION OF OUTPUT Output pin can be adjusted to an extended screen by cascade connection. (1) SHL = "L" Connect DIO1 pin of previous stage to the DIO2 pin of next stage and all the input pins except DIO1 and DIO2 are connected together in each device. (2) SHL = "H" Connect DIO2 pin of previous stage to the DIO1 pin of next stage and all the input pins except DIO2 and DIO1 are connected together in each device. RELATIONSHIP BETWEEN INPUT DATA VALUE AND OUTPUT VOLTAGE The LCD drive output voltages are determined by the input data and 18 (9-by-2) gamma corrected power supplies (VGMA1 - VGMA18). Besides, to be able to deal with dot-line inversion when mounted on a single- side, gradation voltages with different polarity can be output to the odd number output pins and the even number output pins. Among 9-by-2 gamma corrected voltages, input gray-scale voltages of the same polarity with respect to the common voltage, for the respective 9 gamma corrected voltages of VGMA1 - VGMA9 and VGMA10 - VGMA18. SHL = L Last Y1 Y2 Y3 ...... Y307 Y308 Y309 First Last D00 - D05 D10 - D15 D20 - D25 ...... SHL = H Y1 Y2 ...... First - D00 - D05 D10 - D15 D20 - D25 ...... DATA OUTPUT Y3 D00 - D05 D10 - D15 D20 - D25 D00 - D05 D10 - D15 D20 - D25 Y307 Y308 Y309 OUTPUT DATA - Figure 3. Relationship between Shift Direction and Output Data |
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