ST7920 - Topwaydisplay.com

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ST7920Pin descriptionName No. I/O Connects to DescriptionCAP3MCAP1PCAP1MCAP2M34353638I/O Capacitors Capacitor pins for voltage doublerXOFF 32 O ― Reserved (no connection)CAP2P 37 ― ― Reserved (no connection)VD2 39 I Reference voltage Voltage doubler reference voltageN.C.N.C.N.C.456I―――Test pins (no connection)Note:1. VDD>=V0>=V1>=V2>=V3>=V4 must be maintained2. Two clock options:3.When using voltage doubler for VOUT it is recommended that the total sum of bleeder resistors R1~R5 should be larger than 20K OhmR=33K (VDD=5.0V)R=18K (VDD=2.7V)OSC1 OSC2 OSC1 OSC2RClockexternal resistor & current (VDD=5V)external resistor & Frequency (VDD=5V)Iss (uA)8007006005004003002001000Frequency(KHz)90080070060050040030020010005152540608010015254060801005Resistor(K)Resistor(K)V3.1 8/42 2003/04/11
ST7920Voltage doublerVssreference voltage-++-Cap1MCap1PVD2VoutxCap2MCap2PCap3MVout109876543210VoutUnit: V54.74.44.13.83.53.22.92.62.32VD2Reference voltageDoubler voltage mode VD2 & Vout output characteristicNotes:Follower loading resistor total 20k(ohm)Boostaer Cap use 4.7ufPanel size 80mm * 28mm (check display)V3.1 9/42 2003/04/11
Page 2 and 3: ST7920ST7920 Specification Revision
Page 5 and 6: ST7920Pin coordinatesNo. Name X Y1
Page 7: ST7920Pin DescriptionName No. I/O C
Page 11 and 12: ST7920Display data RAM(DDRAM)There
Page 13 and 14: ST7920DDRAM data(char. code)B B BB1
Page 15 and 16: ST7920GDRAM Vertical address(Y)0123
Page 17 and 18: ST7920Instruction set 2: (RE=1: ext
Page 19 and 20: ST7920Description of basic instruct
Page 21 and 22: ST7920• FUNCTION SETRS RW DB7 DB6
Page 23 and 24: ST7920Description of extended instr
Page 26 and 27: ST7920Serial interface :ST7920 is i
Page 28 and 29: ST79208 bit interface:POWER ONWait
Page 30 and 31: ST7920Built in voltage boosterVoutV
Page 32 and 33: ST7920Absolute Maximum RatingsChara
Page 34 and 35: ST7920AC Characteristics (T A = 25
Page 36 and 37: ST79208 bit interface timing diagra
Page 38 and 39: ST7920Serial interface timing diagr
Page 40 and 41: ST7920V3.1 40/42 2003/04/11Applicat
Page 42: ST7920Application circuit 3:LCD: 2L

ST7920 - Topwaydisplay.com

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