90E21 Datasheet, PDF (40/57 Pages) Integrated Device Technology – Single-Phase High-Performance Wide-Span Energy Metering IC

90E21/22/23/24
SINGLE-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
EnStatus
Metering Status
Address: 46H
Type: Read
Default Value After Power On: C800H
15
14
13
12
11
Qnoload
Pnoload
RevQ
RevP
Lline
7
6
5
4
3
-
-
-
-
-
10
9
8
-
-
-
2
1
0
-
LNMode1
LNMode0
Bit
15
14
13
12
11
10 - 2
1-0
Name
Qnoload
Pnoload
RevQ
RevP
Lline
-
Description
This bit indicates whether the chip is in reactive no-load status.
0: not reactive no-load state
1: reactive no-load state
This bit indicates whether the 90E21/22/23/24 is in active no-load status.
0: not active no-load state
1: active no-load state
This bit indicates the direction of the last CF2 (reactive output).
0: reactive forward
1: reactive reverse
Note: This bit is always '0' when the CF2 output is configured to be absolute energy.
This bit indicates the direction of the last CF1 (active output).
0: active forward
1: active reverse
Note: This bit is always '0' when the CF1 output is configured to be absolute energy.
This bit indicates the current metering line in anti-tampering mode.
0: N line
1: L line
Reserved.
These bits indicate the configuration of MMD1 and MMD0 pins. Their relationship is as follows:
LNMode[1:0]
MMD1
0
0
1
1
MMD0
0
1
0
1
LNmod1
0
0
1
1
LNmod0
0
1
0
1
L/N Metering Mode
anti-tampering mode (larger power)
L line mode (fixed L line)
L+N mode (applicable for single-phase three-wire system)
Flexible mode (Line specified by the LNSel bit (MMode, 2BH))
Register
40
January 10, 2012