MAXQ3180 Maxim, MAXQ3180 Datasheet - Page 91

• Manufacturer Part Number: MAXQ3180
• Description: The MAXQ3180 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, power, energy, and many other metering and power-quality parameters of a polyphase load
• Manufacturer: Maxim

On every DSP cycle, the contents of the X.REAF register are tested, and, if negative, absolute values are added to
this register. When this register overflows, the RNFOV bit in the X.EFOVER register is set.
On every DSP cycle, the contents of the X.ESF register are added to this register. When this register overflows, the
SFOV bit in the X.EFOVER register is set. When the MAXQ3180 is operating in low-power mode, energy is not accu-
mulated. However, during low-power mode, current values are accumulated to this register, making this register
accumulate ampere-hours.
Bit:
Name:
Bit:
Name:
Bit:
Name:
Bit:
Name:
Bit:
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Bit:
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Bit:
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Bit:
Name:
Low-Power, Multifunction, Polyphase AFE
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31
23
15
31
23
15
7
7
Energy, Fundamental, Reactive Negative, Phase X = A/B/C (X.ERFNEG)
30
22
14
30
22
14
6
6
Energy Fundamental, Apparent, Phase X = A/B/C (X.ESF)
29
21
13
29
21
13
5
5
Reactive Energy Byte 3
Reactive Energy Byte 2
Reactive Energy Byte 1
Reactive Energy Byte 0
Apparent Energy Byte 3
Apparent Energy Byte 2
Apparent Energy Byte 1
Apparent Energy Byte 0
28
20
12
28
20
12
4
4
27
19
11
27
19
11
3
3
(A: 0x20C, B: 0x2F8, C: 0x3E4)
(A: 0x208, B: 0x2F4, C: 0x3E0)
26
18
10
26
18
10
2
2
25
17
25
17
9
1
9
1
24
16
24
16
8
0
8
0
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