LCD 驱动器
The LC75806PT is 1/4 duty and 1/3 duty LCD display driver that can directly drive up to 304 segments and can control up to 9 general-purpose output ports. This product also incorporates a key scan circuit that accepts input from up to 30 keys to reduce printed circuit board wiring.
Features
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Key input function for up to 30 keys A key scan is performed only when a key is pressed.
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1/4 duty 1/3 bias and 1/3 duty 1/3 bias drive schemes can be controlled from serial data.
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Capable of driving up to 304 segments using 1/4 duty and up to 231 segments using 1/3 duty.
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Switching between key scan output and segment output can be controlled from serial data.
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The key scan operation enabled/disabled state can be controlled from serial data.
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Switching between segment output port and general-purpose output port can be controlled from serial data.
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Switching between general-purpose output port, clock output port, and segment output port can be controlled from serial data.
Up to 9 general-purpose output ports and up to one clock output port
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Serial data I/O supports CCB format communication with the system controller. Support 3.3 V and 5 V operation
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Sleep mode and all segments off functions that are controlled from serial data.
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The frame frequency of the common and segment output waveforms can be controlled from serial data.
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Switching between RC oscillator operating mode and external clock operationg mode can be controlled from serial data.
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Direct display of display data without the use of a decoder provides high generality.
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Built-in display contrast adjustment circuit.
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Provision of an on-chip voltage-detection type reset circuit prevents incorrect displays.
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RES pin provided for forcibly initializing the IC internal circuits.