CC2640: I2C pin configuration

BRUNO CHAVES

Part Number: CC2640

Hi!

I'm using CC2640 chip and I'm starting to configure I2C to communicate with an IMU ic. I read on the datasheet that I can ,almost freely ,choose any pin of the MCU to set it as I2C pin. Anyway, I want to confirm if I can do it on pins DIO_3 and DIO_4 of the package 4mmx4mm, because they are JTAG pins (TDO and TDI respectively). Bellow is the image of the pins:

over 5 years ago

0 daniel_o over 5 years ago

TI__Genius 10690 points

Bruno,

Yes. Please see https://www.ti.com/lit/ug/swcu117i Chapter 11 I/O control.

Regards,

Daniel

0 BRUNO CHAVES over 5 years ago in reply to daniel_o

Intellectual 820 points

Hi, Daniel!

0 BRUNO CHAVES over 5 years ago in reply to daniel_o

Intellectual 820 points

Hi, Daniel! Thansk for the answer, but this link is not working for me. It says :

"It looks like we’ve encountered some resistance."

0 daniel_o over 5 years ago in reply to BRUNO CHAVES

TI__Genius 10690 points

Sorry! Looks like the URL got cut off. Try this: https://www.ti.com/lit/ug/swcu117i/swcu117i.pdf

0 fredrikgk over 5 years ago in reply to daniel_o

Expert 2170 points

Here is a properly formatted link that does not depend on document revision: https://www.ti.com/lit/pdf/swcu117 .

0 BRUNO CHAVES over 5 years ago in reply to daniel_o

Intellectual 820 points

Thanks! I read there that I can use it as i2c, but will it cause any problem to program again the MCU using these jtag pins if they were also being used as I2C?

0 daniel_o over 5 years ago in reply to BRUNO CHAVES

TI__Genius 10690 points

Bruno,

You can still debug because you will have the TMS and TCK pins which is all you need for cJTAG. TDI and TDO are only required for full JTAG.

Regards,

Daniel

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CC2640: I2C pin configuration

"It looks like we’ve encountered some resistance."