DS90UB935-Q1: TI935:I2C Strap Mode

hui_zhu

Part Number: DS90UB935-Q1

Tool/software:

Hi Ti experts,

We use the TI954+ti935 collocation. When the TI935 I2C_STRAP_MODE(0x02) register changes the value from 0x53 to 0x52, the module cannot be light up.

Can you tell us how to solve this problem, or how to analyze it？Please get we some advice

Thank ~

over 1 year ago

0 Glenn Uranga over 1 year ago

TI__Genius 16230 points

Hi Hui,

The I2C Strap mode is set at startup by the IDX (see table below). You can read more about this on section 6.5.1.1.1 IDX.

What is the I2C voltage you are needing 1.8V or 3.3V?

Glenn

0 hui_zhu over 1 year ago in reply to Glenn Uranga

Prodigy 110 points

Hi Ti experts,

The hardware is 1.8v, but the client uses a 3.3v configuration. Is there any register configuration that can solve this problem?Thanks a lot!
Min

0 Glenn Uranga over 1 year ago in reply to hui_zhu

TI__Genius 16230 points

Hi Min,

You can use the register 0x02[0] to adjust the voltage.

Glenn

0 hui_zhu over 1 year ago in reply to Glenn Uranga

Prodigy 110 points

Hi Glenn，

Sorry,Because the customer asked us to use 3.3v configuration for detection, we could not modify 0x02[0], but the probability of lighting failure after modifying this place is high, so I come to you for other solutions.

Min

0 Glenn Uranga over 1 year ago in reply to hui_zhu

TI__Genius 16230 points

HI Hui,

Sorry, I don't understand your request. Can you please elaborate more on this?

Glenn

Interface

Interface forum

DS90UB935-Q1: TI935:I2C Strap Mode