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Part Number: ina219
According to the INA219 datasheet:
Bus voltage register:
1.) Writing a new mode into the Operating Mode bits in the Configuration Register (except for Power-Down or Disable)
2.) Reading the Power Register
But observed behaviour differs:
When polling the bus voltage register (address 02h), a first poll has the flag bit set, any immediate subsequent polls show a low flag bit. After one conversion cycle time, the flag bit is set again.
- the flag bit is unaffected by any reads of the power register (03h)
- the flag bit is cleared by reads of the bus voltage register (02h)
Can anybody confirm or clarify this observation?
Kind regards, Stefan
Jason Bridgmon, TI Sensing Products Applications Support
Current Shunt Monitor Video Training Series
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In reply to Jason Bridgmon:
In reply to Mark Beuvink:
I did some more testing. Writing 0x399B returned 0x3999. After replacing the device, communication works as expected (returning 0x399B after writing 0x399B). The device was damaged (as it is a prototype this could have happened...) but it did not cease operation, it just 'lost' functionality which first showed itself as the CNVR bit sticking low.
Orginal (defect) device:
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