UCD9081 I2C has a transition stretch issue in customer's projects.
if UCD9081 and other chips with SMBus function are connected to one I2C bus. During other chips with SMBus function thansfer data with master chip, if below conditions are all met, there will be a fault occured.
(1). stretch occurs when chips with SMBus transfer data with Master chip.
(2). stretch time is larger than 4ms.
(3). at the stretch ending time, the data on SDA line is just the same with UCD9081's address.
if all conditions above are met, UCD9081 will give a response because it faultly thinks this is an address. this response will make data transfering fail.
so how to prevent this falut response of UCD9081 occuring? could you give some suggestions?
UCD9081 is used in many this customer's projects, this issue result in many projects delay.
thank you!