TAS5548 internal oscillator

Panson Poon

Other Parts Discussed in Thread: TAS5548

I have built my own TAS5548 board. If /RESET, /PDN and /MUTE are left floating, does the internal oscillator start after applying power to the chip? Will I see 12.288 MHz "sine" wave at XTALI (pin 11)? (No I2S connected)

Thanks!

over 12 years ago

0 Panson Poon over 12 years ago

Intellectual 420 points

I made a mistake in the layout shorting the connected crystal. With that fixed, the oscillator is running after power applied.

0 Nate Enos over 12 years ago in reply to Panson Poon

TI__Genius 9450 points

Hello Panson,

Yes, you can leave them floating. They all have 20uA internal weak pullups so logic will be held high. More info can be found in the datasheet pg. 5-6: http://www.ti.com/lit/ds/symlink/tas5548.pdf

Let me know if this answers your question!

Nate

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TAS5548 internal oscillator