SPI operations

AN2159

12/23

Doc ID 11400 Rev 3

Most of registers holds several distinctive values of certain bit length, except CFL and CFH

that are holding a bit map of configurators. Most of values are codified as unsigned integer,

except for two values in DMV which are codified as signed binary.

The data records have fixed position of reading. This means that no addressing of records is

necessary.

Figure 5.

STPMxx data registers

upper f(u)

0 1

p

p

iRMS

uRMS

iMOM

uMOM

1bit

1bit 1bit

20 bit

20 bit

8 bit

6 bit

11 bit

16 bit

DAP

DRP

DSP

CFH

DFP

DEV

DMV

CFL

reactive energy

type0 active energy

apparent energy

lower part of configurators

upper part of configurators

Status

lower f(u)

parity

parity

parity

parity

parity

parity

parity

parity

4 bit

msb

lsb

type 1 energy

mode signals