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ATM90E32AS-AU-R bảng dữ liệu(PDF) 77 Page - ATMEL Corporation

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ATM90E32AS-AU-R bảng dữ liệu(HTML) 77 Page - ATMEL Corporation

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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
VH
Power On Trigger Voltage
2.5
2.7
V
T0
Duration forced in idle mode after power
on
1
ms
T1
Delay time after power on or exit idle
mode
5
16
40
ms
PM[1:0]
Idle Mode
Normal Mode
DVDD
MCU startup
Internal
POR
T1
T0
DVDD
Internal POR
T1
VH



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