參數(shù)資料
型號: 90E32ERGI
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 模擬信號調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, PQFP48
封裝: TQFP-48
文件頁數(shù): 60/67頁
文件大小: 777K
代理商: 90E32ERGI
90E32
POLY-PHASE HIGH-PERFORMANCE WIDE-SPAN ENERGY METERING IC
Electrical Specification
63
August 24, 2011
7.4
POWER ON RESET TIMING
In most case, the power of 90E32 and MCU are both derived from
220V power lines. To make sure 90E32 is reset and can work properly,
MCU must force 90E32 into idle mode firstly and then into normal mode.
In this operation, RESET is held to high in idle mode and de-asserted by
delay T1 after idle-normal transition. Refer to Figure-18.
Figure-18 Power On Reset Timing (90E32 and MCU are Powered on Simultaneously)
Figure-19 Power On Reset Timing in Normal & Partial Measurement Mode
Table-17 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
RESET
T1
T0
DVDD
RESET
T1
VH
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