AM3352 32k oscillator input.

Markus Olsson

Prodigy 180 points

Other Parts Discussed in Thread: TPS65910, AM3352, SN74LVC1G125, SN74LVC1G126

Hi,

Can the OSC1_IN pin on AM3352 be connected to the TPS65910 pin 38 directly instead if using a dedicated crystal?

I am using the built in RTC oscillator in the TPS65910 for reference.

BR
Markus

over 12 years ago

0 Biser Gatchev-XID over 12 years ago

TI__Guru**** 393215 points

Hi Markus,

The OSC1_IN processor pin is on the VDDS_RTC domain, which is 1.8V. The CLK32KOUT pin of the PMIC is on the PMIC VDDIO domian, which can be either 1.8V or 3.3V, but is typically 3.3V to align with processor I/O's. So normally they would't be able to be connected directly. A level tranlsator can be used, such as SN74LVC1G125 or SN74LVC1G126, supplied from VDDS_RTC.

Best Regards

Biser

0 Markus Olsson over 12 years ago in reply to Biser Gatchev-XID

Prodigy 180 points

Hi.

So the short answer is yes, but add a translator if needed?

0 Biser Gatchev-XID over 12 years ago in reply to Markus Olsson

TI__Guru**** 393215 points

The answer is yes only if PMIC VDDIO=1.8V

Biser

Processors

Processors forum

AM3352 32k oscillator input.