STPM11ATR datasheet(29/46 Pages) STMICROELECTRONICS

29 / 46 page

STPM11, STPM12, STPM13, STPM14

Theory of operation

Doc ID 13167 Rev 8

29/46

100000

CHP

8-bit unsigned data for primary current channel calibration.

256 values are possible. When CHP is 0 the calibrator is at -12.5% of the

nominal value. When CHP is 255 the calibrator is at +12.5%. The calibration

step is then 0.098%.

100001

100010

100011

100100

100101

100110

100111

39 (1)

101000

CHS

STPM13/14 only

8-bit unsigned data for secondary current channel calibration.

256 values are possible. When CHS is 0 the calibrator is at -12.5% of the

nominal value. When CHS is 255 the calibrator is at +12.5%. The calibration

step is then 0.098%.

101001

101010

101011

101100

101101

101110

101111

47 (1)

110000

CRC

STPM11/13 only

2-bit unsigned data for calibration of RC oscillator. (see Typical characteristics

in)

CRC=0, or CRC=3 cal=0%

CRC=1, cal=+10%;

CRC=2, cal=-10%

110001

49 (1)

110010

NOM

2-bit modifier of nominal voltage for Single Wire Meter.

NOM=0: KNOM=0.3594 / NOM=1: KNOM=0.3906 / NOM=2: KNOM=0.4219 /

NOM=3: KNOM=0.4531

110011

51 (1)

110100

ADDG

Selection of additional gain on current channels:

ADDG=0: Gain+=0 / ADDG=1: Gain+=8

110101

CRIT

STPM13/14 only

Selection of tamper threshold:

CRIT =0: 12,5% / CRIT =1: 6,25%

110110

LVS

Type of stepper selection:

LVS=0: pulse width 31.25 ms, 5V, / LVS=1: pulse width, 156.25 ms, 3V

IMPORTANT: This Bit represents the MSB of the decimal value indicated in the description column.

Table 15.

Configuration bits map (continued)

Address

Name

N. of

bits

Description (1)

6-BIT

binary

DEC

Obsolete

Product(s)

- Obsolete

Product(s)

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