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sc18is602b What is the reset requirement?

Question asked by Oliver Broad on Mar 4, 2020
Latest reply on Mar 5, 2020 by Jose Alberto Reyes Morales

One demonstration circuit I've looked at shows the reset signal coming from the host microcontroller, which seems like a waste of an I/O pin.

 

Another appears to show an RC network, values unclear.

 

If I don't actually want the microcontroller to force reset the device then can I just tie reset high, is an RC delay enough, or would the device need a clean reset signal from a voltage monitor? With some other devices (Microchip I/O expanders) the reset appears optional and can be tied high.

 

I see that the reset pulse latches the state of the address pins. This would imply that reset timing is important.

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