Part Number:TCA9555
Hi team,
My customer want to use the TCA9555 to control the light-emitting diode. Below is the schematic.
The process is as below:
1. power on the TCA9555(They use the pull down register to keep the output pin as low level during power on)
2.set the register 2 and 3 t0 0.(before set the pin to output, firstly set the 0 to output port register)
3. set the register 6 and 7 to 0 to select the port as the output.(once the pin has been set as output, the level of the output is low)
So customer want to make sure during the process 1,2 and 3, the output 16 bit pin level are always 0.
Can you help to review the design and the register setting?
Another question is about the I/O status when the I2C stuck.
Customer want to know if for some reason, the communication of the I2C has been stuck, what's the status of the I/O pin. It's high level, low level or high impedance?
Lacey
Thanks a lot!