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| LG128321-LY www..com 128 x 32 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. 7.0 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 Nominal Dimensions 84.0 x 44.0 x 14.5 70.0 x 20.0 0.52 x 0.52 0.48 x 0.48 Approx. 50 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. Typ. ----3.0 6.0 Max. Unit V DD 0.6 V DD 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 Symbol VSS V DD VO RS (CS) R/W (SID) Level 0V +5V -H/L H/L Function GND Power supply for logic No connection H : Data L : Instruction Code (Chip enable for serial mode) H : Read L : Write (Serial data for serial mode) Enable (Clock for serial mode ) 0.7VDD - 0.3 IOH = - 0.1mA 0.8VDD 0 IOL = 0.1mA -VDD = 5.0V -Ta=25 C BLOCK DIAGRAM RS(CS) R/W(SID) E(SCLK) /RST PSB DB0 DB7 LCD Controller LSI ST7920 32 COM LCD PANEL 128 x 32 dots _ E(SCLK) H,H >L H/L DB0 DB1 H/L DB2 H/L DB3 H/L DB4 H/L H/L DB5 DB6 DB7 PSB /RST LEDK LEDA H/L H/L H/L L 0V +5V Data bus line 64 SEG 64 SEG H: Parallel mode L: Serial mode Reset signal, active "L" Power supply for LED backlight ST7921 LED BACKLIGHT SPECIFICATIONS (Ta=25 C) VDD VSS VO Power Circuit To LSI LEDA LEDK LED Backlight Item Forward Voltage Forward Current Emission Wave Length Symbol Vf If Typ. 4.1 120 568 Max. 4.3 --Unit V mA nm p |
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