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USB superspeed peripherals Forum Discussions

Anonymous
Not applicable

In the CX3 application note "CX3 Hardware: Frequently Asked Questions - KBA91295" it states that it needs an external 32kHz if you want to use the watchdog feature, but in the datasheet it says that the external clock is optional for the watchdog.

Which is correct?

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alamandaa_16
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Both statements are correct.

1.The “CLKIN32” is an optional signal. This needs to be supplied with 32 KHz clock input if you want to use the “watchdog” feature.

2.The watchdog timer runs a 32-kHz clock, which may be optionally supplied from an external source on a dedicated CX3 pin(CLKIN32).

Regards,

Anil Srinivas.

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alamandaa_16
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Both statements are correct.

1.The “CLKIN32” is an optional signal. This needs to be supplied with 32 KHz clock input if you want to use the “watchdog” feature.

2.The watchdog timer runs a 32-kHz clock, which may be optionally supplied from an external source on a dedicated CX3 pin(CLKIN32).

Regards,

Anil Srinivas.

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Anonymous
Not applicable

Thanks Anil,

I get it now, CLKIN32 is optional for the watchdog timer and reset operation, but if you DO use it, the frequency MUST be 32kHz.

Regards,

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