LG128321 128 x 32 dots Built in 8192 Chinese Fonts ABSOLUTE MAXIMUM RATINGS Item Supply Voltage(Logic) Supply Voltage(LCD) Input Voltage Operating Temp. Storage Temp. MECHANICAL DATA Symbol Min. Max. Unit VDD - VSS VO - VSS VI Topr Tstg -0.3 7.0 -0.3 -0.3 7.0 VDD + 0.3 70 80 V V V C -20 -30 C a Symbol Item VIH VIL VOH VOL I DD VO - VSS Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Supply Current LCD Driving Voltage Typ. Min. 0.7VDD - 0.3 IOH = - 0.1mA 0.8VDD 0 IOL = 0.1mA -VDD = 5.0V -Ta=25 C ----3.0 6.0 Max. Unit V DD 0.6 V DD 0.4 5.0 -- BLOCK DIAGRAM VSS VDD RS(CS) R/W(SID) E(SCLK) /RST PSB LCD Controller LSI ST7920 32 COM LCD PANEL 160 x 32 dots 64 SEG DB0 64 SEG ST7921 DB7 Unit mm mm mm mm g Dot Size ( W x H ) Weight (Reflective/LED) PIN CONNECTIONS ELECTRICAL CHARACTERISTICS ( V DD =5V 0.25V ) Test Condition --- Nominal Dimensions 84.0 x 44.0 x 10.0/14.5 70.0 x 20.0 0.52 x 0.52 0.48 x 0.48 Approx. 35 / 50 Item Module Size ( W x H x T ) Viewing Area ( W x H ) Dot Pitch ( W x H ) V V V V mA V Pin Symbol Level Function 1 2 3 VSS V DD NC +5V 0V -- 4 RS (CS) H/L GND Power supply for logic No connection H : Data L : Instruction Code (Chip enable for serial mode) 5 R/W (SID) H/L 6 7 8 9 10 11 12 13 14 15 16 17 18 _ E(SCLK) H,H >L H/L DB0 DB1 H/L H/L DB2 DB3 H/L H/L DB4 H/L DB5 DB6 H/L DB7 H/L PSB H/L /RST L LEDK 0V LEDA +5V H : Read L : Write (Serial data for serial mode) Enable (Clock for serial mode ) Data bus line H: Parallel mode L: Serial mode Reset signal, active "L" Power supply for LED backlight LED BACKLIGHT SPECIFICATIONS (Ta=25 C) LEDA LEDK Item LED Backlight Forward Voltage Forward Current Emission Wave Length Symbol Typ. Max. Unit Vf If 4.1 4.3 120 568 --- V mA p nm