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STPM32 Datasheet(PDF) 62 Page - STMicroelectronics

No. de pieza STPM32
Descripción Electrónicos  ASSP for metering applications with up to four independent 24-bit 2nd order sigma-delta ADCs, 4 MHz OSF and 2 embedded PGLNA
PDF  121 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STPM32 Datasheet(HTML) 62 Page - STMicroelectronics

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Theory of operation
STPM32, STPM33, STPM34
62/121
DS10272 Rev 8
Figure 46. AH accumulation thresholds
8.4.13
Status bits, event bits and interrupt masks
The device detects and monitors events like sag and swell, tamper, energy register
overflow, power sign and errors, generating an interrupt signal on INTx pins when the
masked event is triggered.
When the event is triggered, the correspondent bit is set in two registers:
Live event register DSP_EV1,2
Status (also called interrupt) register DSP_SR1,2
To output the interrupt on INTx pins, the correspondent bit should be set in the interrupt
control mask register DSP_IRQ1,2
Live event register
In live event registers (DSP_EV1 and DSP_EV2), events are set and cleared by DSP at the
sampling rate DCLK = 7,8125 kHz.
Table 20. AH accumulator LSB
Parameter
Value
AH accumulator register LSB
AH threshold register LSB
LSBAH_ACC
LSBIRMS 2
3600 DClk
-------------------------------- Ah

=
LSBAH_UP
LSBAH_DOWN LSBIRMS
=
2
5 A

=



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