STPM01 datasheet(9/60 Pages) STMICROELECTRONICS

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STPM01

Functions

Doc ID 10853 Rev 8

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Functions

Table 5.

Programmable pin functions

Programmable

Stand-alone mode

(APL register=2 or 3)

Peripheral mode

(APL register=0 or 1)

MON

Output for Stepper’s node (MB)

If APL=0 then Watchdog signal.

If APL=1 then

ΔΣ signal of current channel

MOP

Output for Stepper’s node (MA)

If APL=0 then ZCR

If APL=1 then

ΔΣ signal of voltage channel

LED

If APL=2 then LED provides high frequency

pulses proportional to Active Energy with 50%

duty cycle.

If APL=3 then LED provides pulses proportional

to Active Energy (internal signal AW). The

number of pulses per kWh can be selected

according to the value of KMOT configuration bit.

If APL=0 then LED can provide Active,

Reactive or Apparent Energy according to

value of KMOT configuration bit.

If APL=1 then LED is connected to the MUX

signal generated from the tamper detection

circuit.

When LED=low then the primary current

channel is selected, if LED=high the

secondary current channel is selected.

SCLNLC

No-load indicator:

when low, a no-load condition is detected

Used for SPI interface (see SPI interface

section for details)

SDATD

Tamper indicator:

when low tamper condition is detected

SYN

Negative active power indicator:

when low a negative active power condition is

detected

SCS

Must be high to activate SCLNLC, SDATAD and

SYN indications

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