MR20H40VDCR Просмотр технического описания (PDF) - Extech Instruments Corporation.

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MR20H40VDCR

NVRAM 4Mb 3.3V 512Kx8 SPI

Extech Instruments Corporation. 

MR20H40 / MR25H40

Power Up Timing

The MR2xH40 is not accessible for a start-up time, tPU= 400 μs after power up. Users must wait this time

from the time when VDD (min) is reached until the first CS low to allow internal voltage references to become

stable. The CS signal should be pulled up to VDD so that the signal tracks the power supply during power-up

sequence.

Symbol

VWI

tPU

Table 12 – Power-Up Timing

Parameter

Min

Typical

Max

Unit

Write Inhibit Voltage

2.2

-

-

V

Startup Time

400

-

-

μs

VDD

VDD(max)

Figure 14 – Power-Up Timing

Chip Selection not allowed

VDD(min)

VWI

Reset state

of the

device

t PU

Normal Operation

Time

Copyright © Everspin Technologies 2014

18

MR20H40 / MR25H40 Revision 11, 8/2014

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