LP876242-Q1: Changing the I2C Adress

Tim Teuber

Part Number: LP876242-Q1
Other Parts Discussed in Thread: AWR2243, IWR6243

Tool/software:

Hi Team,

i am currently trying to find out the I2C Address of the LP876242-Q1. I also would like to know how to change the I2C Address.

In the Datasheet, it states that the following:

7.5.2 I2C-Compatible Interface
The default I2C1 7-bit device address of the LP876242-Q1 device is set to a binary value that is described in the
User's Guide of the orderable part number of the LP876242-Q1 PMIC

Unfortunately, i don't find any User Guide, other than the User Guide for the Evaluation Module. Which Document exactly is the Datasheet referencing to.

Furthermore, my Application requires the change of the I2C Address, as multiple Instances of this Device are connected on the same I2C Bus. I am struggling to Understand the Datasheet about this Topic. Could you please provide me with more information / explanation about this?

Thanks and Best Regards,

Tim

over 1 year ago

0 Ishtiaque Panhwar over 1 year ago

TI__Genius 16610 points

Hi Tim,

The LP876242B0RQKRQ1 device by default is configured as SPI interface compatible and primarily developed to power AWR2243 radar SoC and SPI interface is compatible with AWR2243 SoC. So what is your application and does the change from SPI to I2C is for few sample devices or for whole production meaning for huge volumes?

BR,

Ishtiaque

0 Tim Teuber over 1 year ago in reply to Ishtiaque Panhwar

Intellectual 390 points

Hi Ishtiaque,

The LP876242B0RQKRQI is used to power a IWR6243. In the application I2C is used to control the Radar IC. Therefore I want to use a single bus for both devices. Currently the changes would need to be applied to only a few devices.

BR,

Tim

0 Ishtiaque Panhwar over 1 year ago in reply to Tim Teuber

TI__Genius 16610 points

Hi Tim,

But IWR6243 has both I2C as well as SPI interfaces so LP876242B0RQKRQI with SPI configuration can't be used?

BR,

Ishtiaque

0 Tim Teuber over 1 year ago in reply to Ishtiaque Panhwar

Intellectual 390 points

Hi Ishtiaque,

I know about this, but my application requires the usage of i2c.

BR,

Tim

0 Ishtiaque Panhwar over 1 year ago in reply to Tim Teuber

TI__Genius 16610 points

Hi Tim,

Okay LP876242B0RQKRQ1 is configurable device and I2C interface can be configured in the NVM and reprogrammed the device.

You can refer to the following user guide to update existing NVM. The section 8.2.1 Program an Existing NVM Configuration describes on how to update it.

https://www.ti.com/de/lit/pdf/slvubt8

BR,

Ishtiaque

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LP876242-Q1: Changing the I2C Adress