AMC7834: CLAMP Configuration (0x17) R/W problem

Part Number:AMC7834

Should all of the bits 0..6 in CLAMP Configuration (0x17) be readable to indicate their status?  I find that Bit 6 (PAON) does change to reflect its status, but the lower Bits 0..5 do not. I can successfully write to Bits 0..5 to toggle them and clamping/unclamping has the desired effect on the DACs, but reading the bits always returns TRUE (1) whether they are clamped or not.  Is this expected behavior, or perhaps I am missing something?

Thank you -