MR25H10CDC

3

Copyright © Everspin Technologies 2013

MR25H10 Rev. 9, 4/2013

MR25H10

Signal Name  Pin

I/O

Function

Description 

CS

1

Input

ChipSelect

AnactivelowchipselectfortheserialMRAM.Whenchipselectishigh,the

memoryispowereddowntominimizestandbypower,inputsareignored

andtheserialoutputpinisHi-Z.Multipleserialmemoriescanshareacom-

monsetofdatapinsbyusingauniquechipselectforeachmemory.

SO

2

Output

SerialOutput

ThedataoutputpinisdrivenduringareadoperationandremainsHi-Zat

allothertimes.SOisHi-ZwhenHOLDislow.Datatransitionsonthedata

outputoccuronthefallingedgeofSCK.

WP

3

Input

Hold

AlowonthewriteprotectinputpreventswriteoperationstotheStatus

Register.

V

SS

4

Supply

Ground

Powersupplygroundpin.

SI

5

Input

SerialInput

Alldataisinputtothedevicethroughthispin.Thispinissampledonthe

risingedgeofSCKandignoredatothertimes.SIcanbetiedtoSOtocreate

asinglebidirectionaldatabusifdesired.

SCK

6

Input

SerialClock

SynchronizestheoperationoftheMRAM.Theclockcanoperateupto40

MHztoshiftcommands,address,anddataintothememory.Inputsare

capturedontherisingedgeofclock.DataoutputsfromtheMRAMoccur

onthefallingedgeofclock.TheserialMRAMsupportsbothSPIMode0

(CPOL=0,CPHA=0)andMode3(CPOL=1,CPHA=1).InMode0,theclockis

normallylow.InMode3,theclockisnormallyhigh.Memoryoperationis

staticsotheclockcanbestoppedatanytime.

HOLD

7

Input

Hold

AlowontheHoldpininterruptsamemoryoperationforanothertask.

WhenHOLDislow,thecurrentoperationissuspended.Thedevicewill

ignoretransitionsontheCSandSCKwhenHOLDislow.Alltransitionsof

HOLDmustoccurwhileCSislow.

V

DD

8

Supply

PowerSupply

Powersupplyvoltagefrom+2.7to+3.6volts.

CS

SO

WP

V   

V

HOLD

SCK

SI

1

2

3

4

8

7

6

5

SS

DD

Table 1.1  Pin Functions

Figure 1.3  Pin Diagrams (Top View)

8-Pin DFN or 8-Pin DFN Small Flag Package

DEVICE PIN ASSIGNMENT

MR25H10CDC Datasheet Related Products:
MR25H10CDC Information:
Part No.
MR25H10CDC
Description
IC MRAM 1MBIT 40MHZ 8DFN
File Size
1965258 bytes
Page Size
612 x 792 pts (letter)
All Pages
20
Manufacturer
EverSpin Technologies, Inc.
Homepage
http://everspin.com/
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