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ST7575 датащи(PDF) 30 Page - Sitronix Technology Co., Ltd. |
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ST7575 датащи(HTML) 30 Page - Sitronix Technology Co., Ltd. |
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30 / 51 page ![]() ST7575 Ver 1.3 30/51 2007/09/12 Set V0 A0 R/W(RWR) D7 D6 D5 D4 D3 D2 D1 D0 0 0 1 VOP6 VOP5 VOP4 VOP3 VOP2 VOP1 VOP0 The operation voltage V0 can be set by software. V0=( a + VOPx X b ) (1) The parameters are explained in table 4. The maximum voltage that can be generated is depending on the VDD2 voltage and the display load current. For the V0 programmable range, V0 starts from a (6.78V, VOP[6:0]=0x01) with each step equal to b (0.03V). Note that the internal booster is turned off if VOP[6:0]=0x00. Please don’t operate this IC with this setting (VOP[6:0]=0). * The Vop must be operated in the range of 8V to 9.5V for the normal or partial display mode application, so that customer have some range(<8V; >9.5V) to adjust contrast by themselves. Table 4 Typical values for parameter for the HV-Generator programming SYMBOL VALUE UNIT a 6.75 V b 0.03 V VOP[6:0] (programmed) {00 hex… 7F hex} Fig 14. Setting V0 Voltage |
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