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| LG128645-LY www..com 128 x 64 dots + yellow green led backlight built in Chinese font ABSOLUTE MAXIMUM RATINGS Item Supply Voltage(Logic) Supply Voltage(LCD) Input Voltage Operating Temp. Storage Temp. Symbol VDD - VSS VO - VSS VI Topr Tstg Min. -0.3 -0.3 -0.3 -20 -30 Max. 5.5 7.0 VDD + 0.3 70 80 Unit V V V C C MECHANICAL DATA Item Module Size ( W x H x T ) Viewing Area ( W x H ) Dot Pitch ( W x H ) Dot Size ( W x H ) Weight (Reflective/LED) Nominal Dimensions 93.0 x 70.0 x 10.0/13.5 72.0 x 39.0 0.52 x 0.52 0.48 x 0.48 Approx. 55/75 Unit mm mm mm mm g ELECTRICAL CHARACTERISTICS ( V DD =5V0.25V ) Item Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Supply Current LCD Driving Voltage Symbol VIH VIL VOH VOL I DD VO - VSS Test Condition --Min. 0.7VDD - 0.3 Typ. ----3.0 6.2 Max. Unit VDD 0.6 VDD 0.4 5.0 -V V V V mA V PIN CONNECTIONS Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Symbol VSS VDD Vo RS R/W E DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 PSB NC /RST V OUT LEDA LEDK Level 0V +5V -H/L H/L _ H,H >L H/L H/L H/L H/L H/L H/L H/L H/L H/L -L -+5V 0V Function GND Power supply for logic No connection H : Data L : Instruction code H : Read L : Write Enable signal IOH = - 0.1mA 0.8VDD 0 IOL = 0.1mA -VDD = 5.0V -Ta=25 C BLOCK DIAGRAM Control Signals ST7921 RS(CS) R/W(SID) E(SCLK) PS /RST DB0 DB7 32 COM VDD VSS VO VOUT LEDA LEDK Power Circuit To LSI 32 SEG 96 SEG Data bus line LCD Controller LSI ST7920 64 SEG 32 COM 64 SEG 128 x 32 dots 128 x 32 dots H: Parallel mode L: Serial mode No Connection Reset signal, active "L" No connection Power supply for LED backlight LED BACKLIGHT SPECIFICATIONS (Ta=25 C) Item ST7921 Symbol Vf If Typ. 4.1 300 568 Max. 4.3 --Unit V mA nm Forward Voltage Forward Current Emission Wave Length LED B/L Control Signals p |
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