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TPS65988EVM: Why is the Application Customization Tool setting RESERVED bits-2 & 3 (0x0A) in register 0x51 byte-5?

Part Number: TPS65988EVM
Other Parts Discussed in Thread: TPS65988

Working on TPS65988 project. Having issues with 0x51 register programming.

The setting of byte-5 does not jibe with the Host Interface Technical Reference Manual (Literature Number: SLVUBH2B July 2018–Revised September 2018). The tools is setting this byte to 0x0A, but the Host manual only defines bit-0. Don't know why RESERVED bits are being set or what they mean.

Noticed that the lengths of registers, listed in the Host manual, are out of sync with the Application Customization Tool as follows:

Application Customization Tool
GUI Build Version 6.1.1
Configuration File Supported Device: TPS65988 EVM

Port 1 Settings\"Raw View" or Port 2 Settings "Raw View"->"Length" column

0x28 7 (according to tool) s.b. 8 (according to the TPS65988DH Host Interface Technical Reference Manual)

0x37 12 (according to tool) s.b. 20 (according to the TPS65988DH Host Interface Technical Reference Manual)

0x38 12 (according to tool) s.b. 16 (according to the TPS65988DH Host Interface Technical Reference Manual)

0x51 7 (according to tool) s.b. 6 (according to the TPS65988DH Host Interface Technical Reference Manual)

0x55 1 (according to tool) s.b. 0 (according to the TPS65988DH Host Interface Technical Reference Manual)

0x62 10 (according to tool) s.b. 12 (according to the TPS65988DH Host Interface Technical Reference Manual)

Also, Mask and Offset columns in this area of the GUI seem to be useless.

s.b. == should be