TCA9548A-Q1: four I2C masters, one slave application

Jiawei Hu1

Expert 6645 points

Part Number: TCA9548A-Q1

Hi team, do we have I2C switch for 4 masters/1 slave application? Thanks!

Jiawei

2 months ago

0 Caroline Ormond 2 months ago

TI__Intellectual 1230 points

Hello Jiawei,

Since our muxes are bidirectional, the TCA9548A-Q1 should support multiple masters and one slave applications.

Best,

Caroline

0 Clemens Ladisch 2 months ago

Guru 326500 points

Note that the control register of the TCA9548A-Q1 can be accessed only from the SCL/SDA upstream bus and from any currently enabled downstream channel. The switch powers up with all channels disabled, so there must be a master on the upstream bus.

0 Jiawei Hu1 2 months ago in reply to Clemens Ladisch

TI__Expert 6645 points

Hi Clemens, Caroline, so TCA9548-Q1 doesn't support 4 masters 1 slave application. Is there any device we can support this scenario? Thanks!

Clemens Ladisch said:
Note that the control register of the TCA9548A-Q1 can be accessed only from the SCL/SDA upstream bus and from any currently enabled downstream channel. The switch powers up with all channels disabled, so there must be a master on the upstream bus.

0 Caroline Ormond 2 months ago in reply to Jiawei Hu1

TI__Intellectual 1230 points

Hi Jiawei,

Our muxes are bidirectional and can pass I2C signals either way, but, if you are looking for I2C-controlled muxes, we don't have any particularly for multiple masters and single slave applications.

Best,

Caroline

Interface

Interface forum

TCA9548A-Q1: four I2C masters, one slave application