ST7565 - Topwaydisplay.com

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ST7565Reference Circuit ExamplesFigure 15 shows reference circuit examples.1. When used all of the step-up circuit, voltage regulating circuit and V/F circuit(1) When the voltage regulator internal resistor(2) When the voltage regulator internal resistoris used.is not used.(Example where VSS2 = VSS, with 4x step-up)(Example where VSS2 = VSS, with 4x step-up)2. When the voltage regulator circuit and V/F circuit alone are used(1) When the V5 voltage regulator internal resistor (2) When the V5 voltage regulator internal resistoris not used.is used.Ver 0.9 28/28 2001/01/11
ST75653. When the V/F circuit alone is used 4. When the built-in power is not used5. When the built-in power circuit is used to drive a liquidcrystal panel heavily loaded with AC or DC, it isrecommended to connect an external resistor to stabilizepotentials of V1, V2, V3 and V4 which are output from thebuilt-in voltage follower.Examples of shared reference settings When V5 can varybetween –8 and 12 VReference set value R4: 100KΩ ~ 1MΩ It is recommendedto set an optimumFigure 15resistance value R4 taking the liquid crystal display and thedrive waveform.* 1. Because the VR terminal input impedance is high, use short leads and shielded lines.* 2. C1 and C2 are determined by the size of the LCD being driven. Select a value that will stabilize the liquid crystal drivevoltage.Example of the Process by which to Determine the Settings:• Turn the voltage regulator circuit and voltage follower circuit ON and supply a voltage to VOUT from the outside.• Determine C2 by displaying an LCD pattern with a heavy load (such as horizontal stripes) and selecting a C2 that stabilizesthe liquid crystal drive voltages (V1 to V5). Note that all C2 capacitors must have the same capacitance value.• Next turn all the power supplies ON and determine C1.Ver 0.9 29/29 2001/01/11
Page 6 and 7: ST7565PADNo.PIN Name X.5 Y303 COM[5
Page 8 and 9: ST7565PIN DESCRIPTIONSPower Supply
Page 10 and 11: ST7565Pin Name I/O Function No. of
Page 12 and 13: ST7565DESCRIPTION OF FUNCTIONSThe M
Page 14 and 15: ST7565The Busy FlagWhen the busy fl
Page 16 and 17: ST7565Page AddressD3 D2 D1 D0DataLi
Page 18 and 19: ST7565The Common Output Status Sele
Page 20 and 21: ST7565The Power Supply CircuitsThe
Page 22 and 23: ST7565Figure 8VREG is the IC-intern
Page 24 and 25: ST7565Ta = 25 °C and booster off ,
Page 26 and 27: ST7565(C) When External Resistors a
Page 30 and 31: ST7565The Reset CircuitWhen the RES
Page 32 and 33: ST7565Column Address SetThis comman
Page 34 and 35: ST7565LCD Bias SetThis command sele
Page 36 and 37: ST7565Power Controller SetThis comm
Page 38 and 39: ST7565Static Indicator Register Set
Page 40 and 41: ST7565CommandTable 16: Table of ST7
Page 42 and 43: ST75652. When the built-in power is
Page 44 and 45: ST7565RefreshIt is recommended to t
Page 46 and 47: ST7565ABSOLUTE MAXIMUM RATINGSUnles
Page 48 and 49: ST7565Internal PowerItem Symbol Con
Page 50 and 51: ST7565TIMING CHARACTERISTICSSystem
Page 52 and 53: ST7565System Bus Read/Write Charact
Page 54 and 55: ST7565The Serial InterfaceFigure 39
Page 56 and 57: ST7565Reset TimingFigure 41Table 36
Page 58: ST7565RevisionsVersion 0.4 - Page 1

ST7565 - Topwaydisplay.com

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