MP2790 registers

Battery Management
1

Hi,

when I export the register settings from the MP2790 GUI more registers (24) are stored in the file than I can write to the MPS. Means in the exported file are register addresses which are not in the datasheet.

Any idea?

Best,

Achim

2

Do you have an image that you can show of what you are seeing here?

These could be reserved registers that are a byproduct of the setup of the registers and/or settings that can’t be written, but I am curious as to what you are seeing exactly.

3

Hi Krishan,

this is a part of my export from the MP2790 GUI:

0000 0 A0 160 REGA0 0001 1
0000 0 A1 161 REGA1 0043 67
0000 0 A2 162 REGA2 0000 0
0000 0 A3 163 REGA3 0100 256
0000 0 A5 165 REGA5 0000 0
0000 0 A6 166 REGA6 0000 0
0000 0 A7 167 REGA7 00F8 248
0000 0 A8 168 REGA8 0821 2081
0000 0 AA 170 REGAA 0081 129
0000 0 AB 171 REGAB 9100 37120
0000 0 AC 172 REGAC 2000 8192
0000 0 AD 173 REGAD 0020 32
0000 0 AE 174 REGAE 01F0 496
0000 0 AF 175 REGAF 0300 768
0000 0 B0 176 REGB0 0000 0
0000 0 C2 194 REGC2 0800 2048
0000 0 C3 195 REGC3 46FD 18173
0000 0 C4 196 REGC4 4D95 19861
0000 0 C5 197 REGC5 542D 21549
0000 0 C6 198 REGC6 0698 1688
0000 0 C7 199 REGC7 D698 54936
0000 0 E4 228 REGE4 0450 1104
0000 0 E6 230 REGE6 E68F 59023
0000 0 E7 231 REGE7 0111 273
0000 0 E8 232 REGE8 0727 1831
0000 0 E9 233 REGE9 0068 104
0000 0 EB 235 REGEB 0700 1792
0000 0 EC 236 REGEC E410 58384
0000 0 ED 237 REGED 10F5 4341

In this address range a lots of registers are not in the table in the datasheet on page 45.

My plan is to find out the right values for all with the GUI, export them and then set the same values with my microcontroller. Hence I need to know what to do with the registers not contained in the datasheet.

Best regards,

Achim

4

Thanks for sharing this register dump. Let me sift through and compare with the datasheet and any other system level architecture sources so I can verify just what we are looking at here,

In the meantime, has the MP2790 been operating well for you?

5

These registers that you are seeing don’t appear in the MP2790 datasheet because they are internal and reserved addresses that are used by MPS evaluation, firmware, and GUI purposes for configuration suffix -0000 (the default version of this MP2790).

They aren’t on the datasheet because they simply aren’t meant for end-user control. Only program documented registers as specified in the datasheet.

Best,

Krishan

6

Hi Krishan,

thanks a lot for the clarification! Yes the MP2790 is working well in our first prototypes….

But I think the GUI from MPS is a little buggy concerning the voltages and currents. The displayed values have more digits than in the datasheet / relevant. (for OV, UV, OC, UC)

Best regards,

Achim

7

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