STPM01 datasheet(8/56 Pages) STMICROELECTRONICS

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Functions

STPM01

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Table 5.

Internal signal description

Symbol

Name

Description

ZCR

Zero crossing signal

Provides positive pulse every time the line voltage crosses zero

Active energy

Pulse frequency signal proportional to active energy

Reactive energy

Pulse frequency signal proportional to reactive energy

Apparent energy

Pulse frequency signal proportional to apparent energy

LIN

Line frequency signal

This signal is high when the voltage channel value is rising and it is low when

the voltage channel is falling. Basically this signal is the sign of dv/dt.

BFR

Base frequency range

This signal is high when the voltage line frequency is outside the nominal

band. It is low when the voltage line frequency is inside the nominal band.

Stepper motor signals

Signal available in MOP and MON to drive a stepper motor

BIT

Tamper flag

This signal provides the information on the tamper status. If low no tamper is

detected, when high a tamper condition has been detected. This signal is part

of the status register but is also available on the SDATD pin when in

standalone mode.

BIL

No load condition

Provides information on the load condition. This signal is part of the status

BIL=1 no load condition, BIL=0 normal operation.

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