BQ78Z100: I2C Behavior

Kazuki Itoh

Genius 10770 points

Part Number: BQ78Z100

Hi team,

Does BQ78Z100 SCL assert low when BQ78Z100 is busy?

Is there any possible cause which can make SDA stick to low?

Regards,

Itoh

0 Kazuki Itoh over 5 years ago

One additional comment from the customer.

Chapter 3.1.16 NXP document below mentions that SDA can stuck low.

The customer assumes that the BQ78Z100 holds SDA low for some unexpected cause from slave device.

I'd appreciate any helpful information to solve I2C stuck.

Regards,

Itoh

0 Kang Kang over 5 years ago in reply to Kazuki Itoh

Hello Itoh-san,

The first SCL low is clock stretching if the gauge is busy.

For SDA stuck low, can you verify that it is indeed the device pulling it low.

If so, please let us know if this is repeatable in system or a low dppm issue at customer side.

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