DS90UB948-Q1: whether 948 could connect with two touch ICs

Amelie Zheng

Genius 10865 points

Part Number: DS90UB948-Q1

Hi Team,

May I ask whether 948 could connect with two touch ICs?

Thanks!

over 5 years ago

0 Casey McCrea over 5 years ago

TI__Guru** 103215 points

Hello Amelie,

Is the touch controller an I2C slave interface? If so then yes - you can connect the 948 I2C bus to two different touch ICs as long as they have different I2C addresses.

Best Regards,

Casey

0 Amelie Zheng over 5 years ago in reply to Casey McCrea

TI__Genius 10865 points

Hi Casey,

Yes, thanks for your reply.

So both touch IC 1 and touch IC 2 need to connect to 948 I2C ouput (SCK and SDA)?

0 Casey McCrea over 5 years ago in reply to Amelie Zheng

TI__Guru** 103215 points

Hello Amelie,

Yes this is correct.

Best Regards,

Casey

0 Amelie Zheng over 5 years ago in reply to Casey McCrea

TI__Genius 10865 points

Thanks for your reply.

Just one more question. Since customer could only setup one address.

Could they control two touch ICs by different way, one touch IC is I2C, another one is SPI to control.

Thanks again for your help!

0 Casey McCrea over 5 years ago in reply to Amelie Zheng

TI__Guru** 103215 points

Hello Amelie,

Yes, if the touch controller has SPI as well then you could use I2C for one and SPI for the other. Please see the 948 datasheet and the relevant serializer datasheet for information on how to configure for forward channel SPI.

Best Regards,

Casey

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DS90UB948-Q1: whether 948 could connect with two touch ICs