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STPM33TR 데이터시트(PDF) 42 Page - STMicroelectronics

부품명 STPM33TR
상세설명  ASSP for metering applications with up to four independent 24-bit 2nd order sigma-delta ADCs, 4 MHz OSF and 2 embedded PGLNA
PDF  89 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
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STPM33TR 데이터시트(HTML) 42 Page - STMicroelectronics

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Figure 46. AH accumulation thresholds
SAG
I_RMS
PER_ERR
AH_ACC
AH_UP
AH_DOWN
AH
Table 19. AH accumulator LSB
Parameter
Value
AH accumulator register LSB
LSBAH_ACC=LSBI_RMS∙2
3600∙DCLK Aℎ
AH threshold register LSB
LSBAH_UP=LSBAH_DOWN=LSBI_RMS∙25A
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. Live events
Bit
Internal signal
Description
0
PH1+PH2 events(1)
Sign total active power
1
Sign total reactive power
2
Overflow total active energy
3
Overflow total reactive energy
4
PHx events
Sign active power
STPM32, STPM33, STPM34
Functional description of hardwired DSP
DS10272 - Rev 13
page 42/89



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