ATM90E32AS-AU-R datasheet(26/84 Pages) ATMEL

Part #	ATM90E32AS-AU-R

Description	Enhanced Poly-Phase High-Performance Wide-Span Energy Metering IC

PDF	84 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

Logo

26 / 84 page

M90E32AS [Datasheet]

Atmel-46003B-SE-M90E32AS-Datasheet_02122015

3.8.5

TRANSITION OF POWER MODES

The above power modes are controlled by the PM0 and PM1 pins. In application, the PM0 and PM1 pins are connected to

external MCU. The PM0 and PM1 pins have internal RC- filters.

Generally, the M90E32AS stays in Idle mode most of the time while outage. It enters Detection mode at a certain interval

(for example 5s) as controlled by the MCU. It informs the MCU if the current exceeds the configured threshold. The MCU

then commands the M90E32AS to enter Partial Measurement mode at a certain interval (e.g. 60s) to read related current.

After current reading, the M90E32AS gets back to the Idle mode.

The measured current may be used to count energy according to some metering model (like current RMS multiplying the

rated voltage to compute the power).

Any power mode transition goes through the Idle mode, as shown in Figure-14.

Figure-14 Power Mode Transition

Normal Mode

Idle Mode

Detection Mode

Partial

Measurement Mode

ATM90E32AS-AU-R Datasheet(PDF) 26 Page - ATMEL Corporation