MCP39F521 datasheet(35/52 Pages) MICROCHIP

35 / 52 page

 2015 Microchip Technology Inc.

DS20005442A-page 35

MCP39F521

7.0

EVENT OUTPUT PIN/EVENT

CONFIGURATION REGISTER

7.1

Event Pin

The MCP39F521 device has one Event pin that can be

configured in three possible configurations. These

configurations are:

No event is mapped to the pin

Voltage Surge, Voltage Sag, Over Current, or

Over Power event is mapped to the pin. More

than one event can be mapped to the Event pin.

Manual control of the Event pin.

These three configurations allow for the control of

external interrupts or hardware that is dependent on

the measured power, current or voltage. The Event

configuration register (Register 7-1) below describes

how these events and pins can be configured.

7.2

Voltage Sag and Voltage Surge

Detection

The event alarms for Voltage Sag and Voltage Surge

work differently compared to the Over Current and

Over Power events, which are tested against every

computation cycle. These two event alarms are

designed to provide a much faster interrupt if the

condition occurs. Note that neither of these two events

have a respective Hold register associated with them,

since the detection time is less than one line cycle.

The calculation engine keeps track of a trailing

mean square of the input voltage, as defined by the

following equation:

EQUATION 7-1:

Therefore, at each data-ready occurrence, the value of

VSA is compared to the programmable threshold set in

the Voltage Sag Limit register and Voltage Surge Limit

these events are masked to either the Event pin, a

logic-high interrupt will be given on these pins.

The Sag or Surge events can be used to quickly

determine if a power failure has occurred in the system.



LINE

SAMPLE

--------------------------

SAMPLE

LINE



--------------------------

–





MCP39F521 датащи(PDF) 35 Page - Microchip Technology

MCP39F521 датащи(HTML) 35 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

датащи скачать

ссылки URL