topic Re: Multiple SC18IM700 on same bus in Other NXP Products

Multiple SC18IM700 on same bus

j_otisk — Wed, 12 Jun 2019 07:55:02 GMT

Hello,

I was unable to find if is possible to use multiple SC18IM700 on same bus and address each individualy to use theirs GPIO. It should work when using them as UART/I2C bridge because only valie i2c device will respond but how to address each SC18IM700 individually?

Thank you.

Re: Multiple SC18IM700 on same bus

lisettelozano — Mon, 15 Jul 2019 23:30:54 GMT

Hello,

First of all, please accept our apologies for the delayed response.

For this kind of application, the SC16IS752 can work as well.

Have a great day,

Paulina

Re: Multiple SC18IM700 on same bus

j_otisk — Tue, 16 Jul 2019 06:10:06 GMT

Dear Paulina,

thank you for response, but SC16IS752 will not work in my application according to its datasheet it says i2c is SLAVE only.

I need to control I2C ADC through RS485 bus. So I designed following design:

MCU > RS485 > SC18IM700 as I2C master > I2C > ads1115 ADC

Idea is to build dumb ADC nodes on RS485 bus (nodes without MCU).

Question was if this will work with more SC18IM700 on bus because I cannot see any facility to address each of them separately. If all will receive packets and convert them to I2C them I'm ok too, because I2c is addressed so I can filter traffic on I2C slaves by their addresses.