1. OE Output Enable is referenced to VCCA side and needs VCCA levels. OE=high means enableing the device.
2. You need I2C pullup resistors ob both sides. CHeck if they are embedded into your devices or add them externally.
3. Basic rule: Never leave digitals inputs open if you are not instructed to do otherwise. Pull OE high and set A2...A8 to ground.
4. Use a logic analyzer to check your signals. The cheap 24 MHz 8 channel 15€ parts on Amazon are enough for this purpose.
2. You need I2C pullup resistors ob both sides. CHeck if they are embedded into your devices or add them externally.
3. Basic rule: Never leave digitals inputs open if you are not instructed to do otherwise. Pull OE high and set A2...A8 to ground.
4. Use a logic analyzer to check your signals. The cheap 24 MHz 8 channel 15€ parts on Amazon are enough for this purpose.
Statistics: Posted by fchk — Wed May 14, 2025 7:30 pm