Hello,
We are developing a test PCB / fixture for a device that includes an HDQ interface to a battery that contains the BQ2060A gas gauge. We would like to design into the test PCB a method for testing the HDQ interface without having to use the actual battery as a part of the test.
We had hoped to include the BQ2060A on the test PCB as a means to test the HDQ interface. We thought we might be able to read a device ID - or some other factory-loaded register - to simply verify that the HDQ interface is working on a unit under test, using the BQ2060A with minimal connections to the IC (3.3V, ground and HDQ only). However, our attempts to prototype this test approach have failed. We cannot successfully communicate with the BQ2060A with only 3.3V, ground and HDQ pins connected.
Is it possible to use this IC to test a host device's HDQ interface in this way? Or is an EEPROM - or any other additional connection(s) - required to make the HDQ interface on the BQ2060A function at the most basic level? Again, we just need to read a register (any register) that contains a known value, for the purpose of verifying the host HDQ interface is functional.
Thanks in advance,
Paul Willis