BL3501 controller equivalent, universal infrared remote controller.
main oscillator input main oscillator output io port B 0 io port B 1 io port B 2 io port B 3 io port B 4 io port B 5 io port B 6 io port B 7 coding signal output reset RTC oscillator input RTC oscillator output io port A 0 io port A 1 io port A 2 io .
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