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H838532H bảng dữ liệu(PDF) 393 Page - Renesas Technology Corp |
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H838532H bảng dữ liệu(HTML) 393 Page - Renesas Technology Corp |
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393 / 508 page ![]() Section 13 LCD Controller/Driver Rev. 1.00 May 30, 2008 Page 373 of 484 REJ09B0436-0100 Bits 3 to 0: Charge/discharge pulse duty cycle select (CDS3 to CDS0) Bit 3 CDS3 Bit 2 CDS2 Bit 1 CDS1 Bit 0 CDS0 Duty Cycle Notes 0 0 0 0 1 Fixed high (initial value) 0 0 0 1 1/8 0 0 1 0 2/8 0 0 1 1 3/8 0 1 0 0 4/8 0 1 0 1 5/8 0 1 1 0 6/8 0 1 1 1 0 Fixed low 1 0 * * 1/16 1 1 * * 1/32 *: Don’t care Bits 3 to 0 select the duty cycle while the power supply split-resistance is connected to the power supply circuit. When a 0 duty cycle is selected, the power supply split-resistance is permanently disconnected from the power supply circuit, so power should be supplied to pins V 1, V2, and V3 by an external circuit. Figure 13.2 shows the waveform of the charge/discharge pulses. The duty cycle is Tc/Tw. COM1 Charge/discharge pulses Tc Tdc TW 1 frame Tc: Tdc: Power supply split-resistance connected Power supply split-resistance disconnected Figure 13.2 Example of A Waveform with 1/2 Duty and 1/2 Bias |
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