ST7920 - Topwaydisplay.com

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<strong>ST7920</strong>Built in voltage boosterVoutVssVDD5.4V-++-Cap1MCap1PVD2參考電壓VD22.7VxCap2MCap2PVoutCap3MVoutVssExternal reset timingVDDTresXRESETTrwXRESET pulse width Trw 10usRESET start time Tres 50nsV3.1 30/42 2003/04/11
<strong>ST7920</strong>LCD driving wave form (1/33 duty , 1/5 bias )When oscillation frequency is 540KHZ, 1 clock cycle time = 1.85us1 frame = 1.85us x 300 x 33 = 18315us=18.3ms300 clocks1 2 3 4 33 1 2 3 4 33 1 2 3 4 33COM1V0V1V2V3V4VSSCOM2V0V1V2V3V4VSSCOM33V0V1V2V3V4VSSSEGxoffV0V1V2V3V4VSSSEGxonV0V1V2V3V4VSS1 frameV3.1 31/42 2003/04/11
Page 2 and 3: ST7920ST7920 Specification Revision
Page 5 and 6: ST7920Pin coordinatesNo. Name X Y1
Page 7 and 8: ST7920Pin DescriptionName No. I/O C
Page 9 and 10: ST7920Voltage doublerVssreference v
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 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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