ATM90E32AS-AU-R datasheet(77/84 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

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77 / 84 page

M90E32AS [DATASHEET]

Atmel-46003B-SE-M90E32AS-Datasheet_02122015

6.4

POWER ON RESET TIMING

In most case, the power of M90E32AS and MCU are both derived from 220V power lines. To make sure M90E32AS is

reset and can work properly, MCU must force M90E32AS into idle mode firstly and then into normal mode. In this opera-

tion, RESET is held to high in idle mode and de-asserted by delay T1 after idle-normal transition. Refer to Figure-23.

Figure-23 Power On Reset Timing (M90E32AS and MCU are Powered on Simultaneously)

Figure-24 Power On Reset Timing in Normal & Partial Measurement Mode

Table-19 Power On Reset Specification

Symbol

Description

Min

Typ

Max

Unit

Power On Trigger Voltage

2.5

2.7

Duration forced in idle mode after power

Delay time after power on or exit idle

mode

PM[1:0]

Idle Mode

Normal Mode

DVDD

MCU startup

Internal

POR

DVDD

Internal POR

ATM90E32AS-AU-R Datasheet(PDF) 77 Page - ATMEL Corporation