In ADP1048 regs 0x88, 0x89, 0x8B and 0x97, bit [15:11] are N for exponent, but in 0xFE39, there is another exponent.

1. How to interpret the values read on these exponents?

2. How to set Min/Max LSBs on these regs?

Say I power up the controller board (not connected to the main board) and read these regs and here are the values:

0x88 = F000

0x89 = D308

0x8B = F000

0x97 = F800

0xFE39 = 6B7

How to interpret these?

Hello!

The exponent register 0xFE39 sets the exponent for the input-related parameters as listed below.

As such, for example, the READ_VIN 0x88 exponent bits [15:11] are set by bits [5:3] of register 0xFE39.

Let's take some of the hex values you mentioned and convert those to binary. We can see that 0x88 [13:11] has bits equal to 0xFE39 [5:3] bits.

The same action goes for READ_IIN and READ_PIN.

Please consult the following document for more guidelines on min/max exponent options and values.

http://www.analog.com/media/en/technical-documentation/application-notes/AN-1145.pdf

Regards,

Migs