TCA9543A: two host to switch one device

Shu-Cheng LIN

Guru 11785 points

Part Number: TCA9543A

HI Sirs,

Sorry to bother you.

As title, Does TCA9543A could meet our application?

Two host / One device

over 5 years ago

0 Miguel Robertson over 5 years ago

TI__Guru 62920 points

Hi Shu-Cheng,

We can check on this. Do you mean that only one master would be enabled at a given time, and to switch between them the active master would write a command that both disables its channel and enables the other master's channel?

Max

0 BOBBY over 5 years ago in reply to Miguel Robertson

TI__Guru 58260 points

Hey Shu,

The way you currently have the device configured, I am assuming the masters are on the secondary channels and if so then this configuration will not work because the master/host cannot talk to/ configure the TCA9543A. There must be a master on the main SDA/SCL channels for this to work.

Thanks,
-Bobby

0 Shu-Cheng LIN over 5 years ago in reply to BOBBY

Guru 11785 points

Hi Bobby

Thanks for your reply.

There is question about application , If assuming the below design , Did you have suggestion solution?

0 BOBBY over 5 years ago in reply to Shu-Cheng LIN

TI__Guru 58260 points

Hey Shu,

Your diagram does not show what the pins are. If SPK AMP is on SDA/SCL pins of TCA9543A then this will not work. If EC I2C Host or CPU I2C Host is on SDA/SCL pins of TCA9543A then this will work.

Thanks,

-Bobby

Interface

Interface forum

TCA9543A: two host to switch one device