Datasheet

STPM01 Functions
Doc ID 10853 Rev 8 9/60
4 Functions
Table 5. Programmable pin functions
Programmable
pin
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