78M6610+LMU Data Sheet
Status Registers
The STATUS register is used to monitor the status of the device and user configurable alarms. All other
registers mentioned in this section share the same bit descriptions.
The STICKY register determines which alarm/status bits are sticky and which track the current status of
the condition. Each alarm bit defined as sticky will (once triggered) hold its alarm status until the user
clears it using the STATUS_RESET register. Any sticky bit not set will allow the respective status bit to
clear when the condition clears.
The STATUS_SET and the STATUS_RESET registers allow the user to force status bits on or off
respectively without fear of affecting unintended bits. A bit set in the STATUS_SET register will set the
respective bit in the STATUS register and a bit set in the STATUS_RESET register will clear it.
STATUS_SET and STATUS_RESET are both cleared after the status bit is set or reset.
The following table lists the bit mapping for all the status related registers.
Bit
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
Name
Stick-able
No
Description
DRDY
New low-rate results (data) ready
Min/Max Update occurred
Voltage A Sag Condition Detected
Voltage B Sag Condition Detected
Sign of VA
MMUPD
Yes
VA_SAG
Yes
VB_SAG
Yes
SIGN_VA
SIGN_VB
OV_TEMP
UN_TEMP
OV_FREQ
UN_FREQ
OV_VRMSA
UN_VRMSA
OV_VRMSB
UN_VRMSB
VA_SURGE
VB_SURGE
OV_WATT1
OV_WATT2
OV_AMP1
OV_AMP2
XSTATE
No
No
Sign of VB
Yes
Temperature over High Limit
Under Low Temperature Limit
Frequency over High Limit
Under Low Frequency Limit
RMS Voltage A Over Limit
RMS Voltage A Under Limit
RMS Voltage B Over Limit
RMS Voltage B Under Limit
Voltage A Surge Condition Detected
Voltage B Surge Condition Detected
Power 1 Over Limit
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
8
Yes
7
Yes
6
Yes
Power 2 Over Limit
5
Yes
Current 1 Over Limit
4
Yes
Current 2 Over Limit
3
No
Crystal status
2
RELAY1
Always
Always
Always
Relay 1 ON
1
RELAY2
Relay 2 ON
0
RESET
Set by device after any type of reset
39
Rev 0
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
