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HX8346-A(T)240RGB x 320 dot, 262K color, TFT Mobile Single Chip Driver5.4.3 Example 1: MPU Write is faster than Panel ReadDATA SHEET V01Figure 5. 31Data write to Frame Memory is now synchronized to the Panel Scan. It should bewritten during the vertical sync pulse of the Tearing Effect Output Line. This ensuresthat data is always written ahead of the panel scan and each Panel Frame refresh hasa complete new image:Figure 5. 32Himax ConfidentialThis information contained herein is the exclusive property of Himax and shall not be distributed, reproduced, or disclosedin whole or in part without prior written permission of Himax.-P.57-July, 2007
HX8346-A(T)240RGB x 320 dot, 262K color, TFT Mobile Single Chip Driver5.4.4 Example 2: MPU Write is slower than Panel ReadDATA SHEET V01MCU to Memory1st320thTimeTE output signalTimeMemory to LCD1st320thImage on LCD a b c defTimeFigure 5. 33The MPU to Frame Memory write begins just after Panel Read has commenced i.e.after one horizontal sync pulse of the Tearing Effect Output Line. This allows time forthe image to download behind the Panel Read pointer and finishing download duringthe subsequent Frame before the Read Pointer “catches” the MPU to Frame memorywrite position.Figure 5. 34Himax ConfidentialThis information contained herein is the exclusive property of Himax and shall not be distributed, reproduced, or disclosedin whole or in part without prior written permission of Himax.-P.58-July, 2007
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