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LC75852W Fiches technique(PDF) 4 Page - Sanyo Semicon Device |
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LC75852W Fiches technique(HTML) 4 Page - Sanyo Semicon Device |
4 / 16 page Block Diagram Pin Functions No. 4828-4/16 LC75852E, 75852W Pin Pin No. Function Active I/O Handling when unused S1/P1 to S4/P4 S5 to S43 COM1 COM2 KS1/S44, KS2/S45, KS3 to KS6 KI1 to KI5 OSC CE CL DI DO RES V DD V SS 1 to 4 5 to 43 44 45 46 47 48 to 51 52 to 56 57 62 63 64 61 59 60 58 Segment outputs: Used to output the display data that is transmitted over the serial data input. Pins S1/P1 to S4/P4 can be used as general-purpose outputs according to control data specification. Common driver outputs. The frame frequency f O is (fOSC/512) Hz. Key scan outputs. When a key matrix is formed, normally a diode will be attached to the key scan timing line to prevent shorts. However, since the output transistor impedance is an unbalanced CMOS output, it will not be damaged if shorted. Pins KS1/S44 and KS2/S45 can be used as segment outputs according to control data specification. Key scan inputs: Pins with a built-in pull-down resistor. Oscillator connection: Oscillator circuit can be formed by connecting the pin to a resistor and a capacitor. CE: Chip enable CL: Synchronization clock DI: Transfer data DO: Output data Serial data interface: Connected to the controller. Since DO is an open-drain output, it requires a pull-up resistor. Reset input that re-initializes the LSI internal states. During a reset, the display segments are turned off forcibly regardless of the internal display data. All internal key data is reset to low and the key scan operation is disabled. However, serial data can be input during a reset. Power supply connection. A supply voltage of between 4.5 and 6.0 V must be provided. Power supply ground connection. Must be connected to GND. — — — H — H — — L — — O O O I I/O I I I O I — — Open Open Open GND V DD GND Open GND — — |
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