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LG128645
128 x 64 dots
Built in 8192 Chinese Fonts
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
MECHANICAL DATA
Item Nominal Dimensions Unit mm mm mm mm g Module Size ( W x H x T ) 93.0 x 70.0 x 10.0/13.5 72.0 x 39.0 Viewing Area ( W x H ) Dot Pitch ( W x H ) 0.52 x 0.52 0.48 x 0.48 Dot Size ( W x H ) Weight (Reflective/LED) Approx. 55/75
C
ELECTRICAL CHARACTERISTICS ( V DD =5Va0.25V )
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 6.5 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 NC RS R/W E DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 PSB NC /RST NC 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
0.7VDD - 0.3 I OH = - 0.1mA 0.8VDD I OL = 0.1mA 0 -VDD = 5.0V -Ta=25 C
BLOCK DIAGRAM
Control Signals ST7921 VSS VDD RS(CS) R/W(SID) E(SCLK) PS /RST DB0 DB7 LEDA LEDK ST7921 LED B/L Control Signals
Data bus line
LCD Controller LSI ST7920
64 SEG 32 COM
64 SEG
128 x 32 dots 128 x 32 dots 32 COM 32 SEG 96 SEG
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 Forward Voltage Forward Current Emission Wave Length Symbol Vf If p Typ. 4.1 300 568 Max. 4.3 --Unit V mA nm

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