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Error in datasheet for read/writes to multi-pin registers

Thread Summary

The user reported a discrepancy in the MAX7301 datasheet regarding read operations from multi-pin registers, where bits D4-D7 are data bits and D0-D3 read as 0. Writing operations follow the datasheet correctly. The user was directed to contact their regional FAE/Sales team or the part specialist for documentation corrections.
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Category: Datasheet/Specs

Hi! I found MAX7301 behavior that differs from what is indicated in the datasheet. Reads and writes to the multi-pin registers that write to fewer than 8 pins at once return data differently than documented (see highlighted line).

When reading from this register, I saw that bits D4-D7 were the ones that were data bits, and D0-D3 were read as 0. Similarly, for the 5 ports 4-8 register, D3-D7 were data bits and D0-D2 were 0s.

However, when writing to this register, it appears the documentation is correct and bits D0-D3 must be written to be applied to ports 4-7.

Might need to update the documentation / specify this discrepancy in the datasheet!

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