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YMF262 minimum clock / unclocked?


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The datasheet for YMF262 lists the chip requiring a clock of 10 to 16 MHz. Will it suffer if left unclocked, and should clock be established at the same time as the power supply?

Has anyone built a Midibox-FM without supplying a clock for the YMF262 chip?

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Will it suffer if left unclocked, and should clock be established at the same time as the power supply?

This isn't specified in the datasheet, but I think that the clock could also start later.

Has anyone built a Midibox-FM without supplying a clock for the YMF262 chip?

This won't work, as the clock is used to generate the audio frequencies.

The OPL3 has no inbuilt oscillator.

Btw.: why are you asking? If you are planning to build a MBFM, the 14.318 MHz oscillator is required, otherwise the oscillator pitches won't be correctly tuned.

Best Regards, Thorsten.

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