BQ27441EVM-G1B: BQ27441 registers, Big Endian? or Little Endian?

Feng Xu

Part Number: BQ27441EVM-G1B

Hi,

There are many 16bit registers in BQ27441, such as SOC,

The SOC is little endian, 0x1C is LSB and 0x1D is MSB.

while Design Capacity is big endian, 0x4A is MSB and 0x4B is LSB.

What about other 16bit registers? Are they little endian or big endian?

Thank you.

Frank

0 Vos over 4 years ago

Frank,

for the bq27441 all values returned over I2C will be Little Endian.

Thanks,

Eric Vos

0 Feng Xu over 4 years ago in reply to Vos

But according to the BQ27441 Technical Reference, it seems Design Capacity is big endian, 0x4A is MSB and 0x4B is LSB.

And I have checked the default value read from Design Capacity, big endian makes the right value.

+1 Dominik Hartl11 over 4 years ago in reply to Feng Xu

The basic rule is that everything in data memory is big endian and everything read directly through standard commands is little endian.

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