MAXQ3181 Maxim, MAXQ3181 Datasheet - Page 37

• Manufacturer Part Number: MAXQ3181
• Description: The MAXQ3181 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, active power and energy, and many other metering parameters of a polyphase load
• Manufacturer: Maxim

This register specifies the fraction of full-scale voltage that is declared to be an overvoltage condition. When X.VRMS
exceeds this level for one DSP cycle, the OVF flag in the X.FLAGS register is set. If the OVM flag is set in the
X.MASK register, setting the OVF flag will cause the interrupt bit OV to be set in the IRQ_FLAG register. If the inter-
rupt is enabled, the interrupt pin is driven active. Full scale is represented by 0x10000. The maximum value for this
register is 0xFFFF.
This register specifies the fraction of full-scale voltage below which an undervoltage condition is declared. When
X.VRMS falls below this level for one DSP cycle, the UVF flag in the X.FLAGS register is set. If the UVM flag is set in
the X.MASK register, setting the UVF flag will cause the interrupt bit UV to be set in the IRQ_FLAG register. If the
interrupt is enabled, the interrupt pin is driven active. Full scale is represented by 0x10000. The maximum value for
this register is 0xFFFF.
This register specifies the fraction of full-scale current below which a no-load condition is declared. When X.IRMS
falls below this level, the MAXQ3181 no longer accumulates power for phase X. Full scale is represented by
0x10000. The maximum value for this register is 0xFFFF.
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Low-Power, Active Energy, Polyphase AFE
______________________________________________________________________________________
15
15
15
7
7
7
14
14
14
6
6
6
13
13
13
5
5
5
Undervoltage Level High Byte
Undervoltage Level Low Byte
Overvoltage Level High Byte
Overvoltage Level Low Byte
No-Load Level High Byte
No-Load Level Low Byte
12
12
12
4
4
4
0xFF
0xFF
0x00
0x00
0x00
0x03
Undervoltage Level (UVLVL) (0x048)
11
11
11
3
3
3
Overvoltage Level (OVLVL) (0x046)
No-Load Level (NOLOAD) (0x04A)
10
10
10
2
2
2
9
1
9
1
9
1
8
0
8
0
8
0
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