WMS7201

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The WMS7201 has four NVMEM positions available for storing the output buffer operating mode and

the potentiometer setting. These NVMEM positions can be directly written through the SPI using a

write command (#5) with address and data bytes. Another command (#7) is available that stores the

current output buffer operating mode and potentiometer settings into the selected NVMEM position.

Bit A3 and A2 in the instruction byte decide which NVMEM position is used. (See Table 5)

The potentiometer is loaded with the value stored in the NVMEM position 0 on power up.

7.3.1 Write Protect of NVMEM

available on the 10-pin package.

Reading and writing to NVMEM requires an internal access cycle to complete before the next

command can be sent.

Read Tap Register (#2)

Read NVMEM (#4)

Program NVMEM (#5)

Load Tap Register(#6)

Program NVMEM with Tap Register (#7)