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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
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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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