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71M6513/71M6513H Demo Board User’s Manual
Page: 38 of 112
©
2005-2006 TERIDIAN Semiconductor Corporation
Revision 5.6
MPU STATUS WORD
The MPU maintains the status of certain meter and I/O related variables in the Status Word. The Status Word is
located at address 0x21. The bit assignments are listed in Table 1-11.
Status
Word Bit
Name
DESCRIPTION
0 Reserved
1
SAGA
Reserved for sag flag phase A – not implemented
1
2
SAGB
Reserved for sag flag phase B – not implemented
1
3
SAGC
Reserved for sag flag phase C – not implemented
1
4
F0
Reconstructed line signal flag
5
MAXV
Overvoltage. 1 when overvoltage is detected.
6
MAXI
Overcurrent. 1 when overcurrent is detected.
7 ONE_SEC
Reserved
8 VXEDGE
Reserved
9 Reserved
10 Reserved
11 XFER
Reserved
12 CREEP
Creep bit. This bit is 1 when creep is detected. This bit is only set if a creep
condition is detected in all phases.
13-31 Reserved
Note:
1
: Not implemented in Demo Code revision 3.04
Table 1-11: MPU Status Word Bit Assignment
http://www.datasheetcatalog.com/