Other Parts Discussed in Thread: TCA9554A
1) We expected to use IO 0-7 to control LED, which part is suggested by TI?
TCA9534A or TCA9554A
2) Does TI suggest that I/O port connect to LED directly?
3) Check datasheet, TCA9554A embedded weak pull up (100K ohm) on I/O port.
It means there is a pull up resistor individually on ID0 to ID7 ?