MB90M407 circuit equivalent, (mb90m405 series) built in fl display controller circuit.
* Clock
* Internal PLL clock multiplication circuit
* Oscillation clock 1/2 main oscillation clock 1 × to 4 × PLL oscillation clock (2 MHz to 16 MHz at 4 MHz.
requiring fluorescent display tube panel control. Each microcontroller is equipped with 60 highly voltage-resistant outp.
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