78M6610+PSU/EK#1 Maxim Integrated, 78M6610+PSU/EK#1 Datasheet - Page 16

• Manufacturer Part Number: 78M6610+PSU/EK#1
• Description: Development Boards & Kits - Other Processors 78M6610 EVAL KIT
• Manufacturer: Maxim Integrated

Specifications of 78M6610+PSU/EK#1

• Rohs: yes
• Part # Aliases: 90-X6610#KK1

enabled in the AlarmMask2 register, the ACCRIT pin will also be asserted low. If the Vsag bit is set in the
AlarmsSticky register, then Alarms.Vsag will remain set and ACCRIT will remain low until the Vsag alarm
is cleared via the AlarmReset register or the 78M6610+PSU is reset. If AlarmsSticky.Vsag is cleared,
then Alarms.Vsag will be cleared and ACCRIT set high as soon as the V
to the VSAG register. If the VSAG register is set to 0, the sag feature is disabled.
The sag detection can be used to monitor or record the quality of the power line or utilize the sag alarm
pin to notify external devices (for example a host microprocessor) of a pending power-down. The external
device can then enter a power-down mode (for example saving data or recording the event) before a
Power outage. Figure 11 shows a typical sag event.
78M6610+PSU Data Sheet
2.11 Voltage Sag and Surge Detection
The 78M6610+PSU implements a voltage sag detection function, which can generate an alarm when the
line voltage drops below a programmable threshold.
The firmware calculates on a sample-by-sample basis the trailing mean square of the input voltage:
At each sample interval the V
register. If V
programmable threshold.
The sample count for sag detection is automatically adjusted by the firmware to maintain coverage over
half of the AC cycle. Sag detection is disabled by default and can be enabled by writing a non-zero value
16
MS
falls below the threshold, the firmware sets the Vsag bit in the Alarms register. If Vsag is
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Figure 11: Typical Sag Event
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