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Everspin Technologies
Everspin Technologies

MR25H256 Datasheet Preview

MR25H256 Datasheet

256Kb Serial SPI MRAM

No Preview Available !

MR25H256 pdf
MR25H256 / MR25H256A
FEATURES
•  No write delays
•  Unlimited write endurance
•  Data retention greater than 20 years
•  Automatic data protection on power loss
•  Block write protection
•  Fast, simple SPI interface with up to 40 MHz clock rate
•  2.7 to 3.6 Volt power supply range
•  Low current sleep mode
•  Industrial and Automotive Grade 1 and Grade 3 tempera-
tures
•  Available in 8-DFN or 8-DFN Small Flag RoHS-compliant
package.
•  Direct replacement for serial EEPROM, Flash, FeRAM
•  Industrial Grade and AEC-Q100 Grade 1 and Grade 3 options
•  Moisture Sensitivity MSL-3
256Kb Serial SPI MRAM
8-DFN
Small Flag 8-DFN
RoHS
Product Versions and Options
MR25H256A has been released for mass production and is recommended for all new designs.
MR25H256 remains in mass production but will be subject to eventual phase out and end of life
and is not recommended for new designs.Both versions have the same specifications.
MR25H256A Product Options
Grade
Industrial
Automotive AEC-Q100 Grade 3
Automotive AEC-Q100 Grade 1
Temperature Package
-40 to +85 C 8-DFN Small Flag
-40 to +85 C 8-DFN Small Flag
-40 to +125 C 8-DFN Small Flag
MR25H256 Product Options (Not recommended for new designs)
Grade
Temperature Package
Industrial
-40 to +85 C
8-DFN Small Flag
8-DFN
Automotive AEC-Q100 Grade 1
-40 to +125 C
8-DFN Small Flag
8-DFN
Copyright © 2017 Everspin Technologies
1 MR25H256 / MR25H256A Rev. 1.4, 2/2017



Everspin Technologies
Everspin Technologies

MR25H256 Datasheet Preview

MR25H256 Datasheet

256Kb Serial SPI MRAM

No Preview Available !

MR25H256 pdf
MR25H256 / MR25H256A
TABLE OF CONTENTS
OVERVIEW.............................................................................................................................................4
Figure 1 – Block Diagram............................................................................................................................................ 4
System Configuration......................................................................................................................4
Figure 2 – System Configuration.............................................................................................................................. 4
DEVICE PIN ASSIGNMENT....................................................................................................................5
Figure 3 – Pin Diagram All 8-DFN Packages......................................................................................................... 5
Table 1 – Pin Functions All 8-DFN Packages........................................................................................................ 5
SPI COMMUNICATIONS PROTOCOL....................................................................................................6
Table 2 – Command Codes........................................................................................................................................ 6
Status Register and Block Write Protection...................................................................................6
Table 3 – Status Register Bit Assignments............................................................................................................ 6
Table 4 – Block Memory Write Protection............................................................................................................. 7
Table 5 – Memory Protection Modes..................................................................................................................... 7
Read Status Register (RDSR)............................................................................................................7
Figure 4 – RDSR.............................................................................................................................................................. 7
Write Enable (WREN)........................................................................................................................8
Figure 5 – WREN............................................................................................................................................................. 8
Write Disable (WRDI)........................................................................................................................8
Figure 6 – WRDI.............................................................................................................................................................. 8
Write Status Register (WRSR)..........................................................................................................9
Figure 7 – WRSR.............................................................................................................................................................. 9
Read Data Bytes (READ)................................................................................................................ 10
Figure 8 – READ............................................................................................................................................................ 10
Write Data Bytes (WRITE).............................................................................................................. 11
Figure 9 – WRITE........................................................................................................................................................... 11
Enter Sleep Mode (SLEEP)............................................................................................................. 12
Figure 10 – SLEEP......................................................................................................................................................... 12
Copyright © 2017 Everspin Technologies
2 MR25H256 / MR25H256A Rev. 1.4, 2/2017


Part Number MR25H256
Description 256Kb Serial SPI MRAM
Maker Everspin Technologies
Total Page 24 Pages
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MR25H256 pdf
MR25H256 Datasheet PDF
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1 MR25H256 256Kb Serial SPI MRAM Everspin Technologies
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2 MR25H256A 256Kb Serial SPI MRAM Everspin Technologies
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