PCM6240-Q1: Related to temporal relationships

ye zeng

Part Number: PCM6240-Q1

Tool/software:

1. First question:

"The specification document only describes the power-up sequence related to I2C and power supply, but does not specify the power-down sequence. Could you please provide a detailed description of it?"

2. Second question:

"Could you please verify if the current treatment of the unused pins on the IC is appropriate?"

7 months ago

0 Daveon Douglas 6 months ago

TI__Mastermind 27330 points

Hi,

The power-down sequence is shown in the image attached and explained in the second paragraph of section 10.

Additionally, unused GPIO pins can be left floating

0 ye zeng 6 months ago in reply to Daveon Douglas

Prodigy 70 points

Timing description of the time. I'm concerned about the timing of I2C or TDM communication, so far I can understand that t5 > 2ms, can I ask about the time of t6?

0 Jeff McPherson 6 months ago in reply to ye zeng

TI__Mastermind 46805 points

Hi Ye,

Daveon is out of office until tomorrow due to travel. He will follow up with you then.

Best regards,
Jeff McPherson

+1 Daveon Douglas 6 months ago in reply to Jeff McPherson

TI__Mastermind 27330 points

Hi Ye,

If you're performing a hardware shutdown and removing power supplies there is no need for an I2C specific timing requirement because no I2C transactions are occurring at this stage. Additionally, the current power-down sequence highlighted by t4 and t3 will create a graceful system shutdown so only t5 is required.

0 ye zeng 6 months ago in reply to Daveon Douglas

Prodigy 70 points

Sorry I didn't read it carefully before, I've understood it so far, thanks for the reply

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PCM6240-Q1: Related to temporal relationships