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2022-09-24 14:15:06
Supply WCH brand CH455G original spot contact QQ1640951075
Features:
● Built-in display current driver stage, the segment current is not less than 25mA, and the word current is not less than 160mA.
● Dynamic display scan control, support 8×4 or 7×4, directly drive 4 digital tubes or 32 LEDs.
● Internal current limiting, providing 8-level brightness control through duty cycle setting.
● Built-in 28-key keyboard controller, based on 7×4 matrix keyboard scanning.
● Built-in pull-down resistor for key state input, built-in debounce circuit.
● Provides a low-level active keyboard interrupt, and provides a key release flag, which can be used to query the key press and release.
● High-speed 2-wire serial interface, clock speed from 0 to 4MHz, compatible with two-wire I2C bus, saving pins.
● Built-in power-on reset, support 2.7V ~ 5V power supply voltage.
● Supports low-power sleep, saves power, and can be woken up by a button or a command operation.
● Built-in clock oscillation circuit, no need to provide external clock or external oscillation components, more anti-interference.