lc75864w Sanyo Semiconductor Corporation, lc75864w Datasheet
lc75864w
Related parts for lc75864w
lc75864w Summary of contents
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... Ordering number : ENN6860 1/4 Duty LCD Display Drivers with Key Input Function Overview The LC75864E and LC75864W are 1/4 duty LCD display drivers that can directly drive segments and can control up to four general-purpose output ports. These products also incorporate a key scan circuit that accepts input from keys to reduce printed circuit board wiring ...
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... Specifications Absolute Maximum Ratings 25°C, V Parameter V Maximum supply voltage V Input voltage Output voltage Output current Allowable power dissipation Operating temperature Storage temperature LC75864E, 75864W LC75864E (QIP48E) LC75864W (SQFP48 Symbol Conditions max max V LCD LCD V ...
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Allowable Operating Ranges –40 to +85°C, V Parameter Symbol Supply voltage V V LCD LCD Input voltage LCD V 1 CE, CL Input high level voltage ...
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Electrical Characteristics for the Allowable Operating Ranges Parameter Symbol Hysteresis V CE, CL, DI, KI1 to KI5 H Power-down detection voltage V DET Input high level current I CE, CL, DI Input low level current I CE, CL, ...
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When CL is stopped at the low level CE tøH tøL VIH1 CL 50% VIL tr tf VIH1 DI VIL tds tdh DO 2. When CL is stopped at the high level CE tøL tø ...
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Block Diagram V LCD V 1 LCD COMMON DRIVER V 2 LCD V SS TEST CLOCK OSC GENERATOR DO CCB DI INTERFACE VDET LC75864E, 75864W SEGMENT DRIVER & LATCH SHIFT REGISTER CONTROL REGISTER KEY BUFFER KEY ...
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Pin Functions Pin Pin No. Segment outputs for displaying the display data transferred by serial data S1/P1 to S4/ input S22 The S1/P1 to S4/P4 pins can be used as general-purpose output ...
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Serial Data Input 1. When CL is stopped at the low level ...
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Control Data Functions 1. S0, S1: Sleep control data These control data bits switch between normal mode and sleep mode and set the states of the KS1 to KS6 key scan outputs during key scan standby. Control data Mode S0 ...
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DR: 1/2 bias or 1/3 bias drive selection data This control data bit switches between LCD 1/2 bias or 1/3 bias drive. DR Drive scheme 0 1/3 bias drive 1 1/2 bias drive Display Data and Output Pin Correspondence ...
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Serial Data Output 1. When CL is stopped at the low level Note B3 ... CCB address 2. When ...
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Sleep Mode Functions Sleep mode is set up by setting the control data to 1. The segment outputs will all go low and the common outputs will also go low, and the oscillator on the OSC ...
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Key input 1 Key input 2 Key scan 800T(s) CE Serial data transfer Serial data transfer DI DO Key data read request 3. In sleep mode • The pins KS1 to KS6 are set to high or low by the ...
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Key input (KS6 line) Key scan 800T(s) CE Serial data transfer Serial data transfer DI DO Key data read request Multiple Key Presses Although the LC75864E/W is capable of key scanning without inserting diodes for dual key presses, triple key ...
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Duty, 1/2 Bias Drive Technique COM1 COM2 COM3 COM4 LCD driver output when all LCD segments corresponding to COM1, COM2, COM3 and COM4 are turned off. LCD driver output when only LCD segments corresponding to COM1 are on LCD ...
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Duty, 1/3 Bias Drive Technique COM1 COM2 COM3 COM4 LCD driver output when all LCD segments corresponding to COM1, COM2, COM3 and COM4 are turned off. LCD driver output when only LCD segments corresponding to COM1 are on LCD ...
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Voltage Detection Type Reset Circuit (VDET) This circuit generates an output signal and resets the system when logic block power is first applied and when the voltage drops, i.e., when the logic block power supply voltage is less than or ...
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LC75864E/W internal block states during the reset period • CLOCK GENERATOR Reset is applied and the base clock is stopped. However, the OSC pin state (normal or sleep mode) is determined after the S0 and S1 control data bits ...
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Output pin states during the reset period Output pin State during reset *5 S1/P1 to S4/ S22 L COM1 to COM4 L *5 KS1/S23, KS2/S24 L *6 KS3 to KS5 KS6 ...
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Sample Application Circuit 1 1/2 bias (for use with normal panels) +5V *8 +5.5V C 0.047 F From the controller To the controller To the controller *9 power supply Note: *8.Add a capacitor to the logic block power supply line ...
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Sample Application Circuit 2 1/2 bias (for use with large panels) + 0.047 F +5. From the controller To the controller To the controller *9 power supply Note: *8.Add a ...
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Sample Application Circuit 3 1/3 bias (for use with normal panels) +5V *8 +5.5V C 0.047 From the controller To the controller To the controller *9 power supply Note: *8.Add a capacitor to the logic block power ...
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Sample Application Circuit 4 1/3 bias (for use with large panels) + 0.047 F +5. From the controller To the controller To the controller *9 power supply Note: ...
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Notes on the controller key data read techniques 1. Timer based key data acquisition (1) Flowchart Key data read processing (2) Timing chart Key on Key input Key scan Key DI address t7 Key data read DO ...
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Interrupt based key data acquisition (1) Flowchart (2) Timing chart Key on Key input Key scan Key DI address t7 Key data read DO Key data read request Controller determination (Key on) t5: Key scan execution ...
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In this technique, the controller uses interrupts to determine key on/off states and read the key data. The controller must check the DO state when CE is low low, the controller recognizes that a key has ...