The delivery time for MRAM from Everspin and ISSI continues to lengthen,with some part numbers requiring a quarterly inquiry cycle,often causing delays in mass production of entire machines due to a shortage of small-capacity memory chips.EMI's 64Mbit MRAM chip serves as a domestic alternative solution to address this gap.
The EMI 64Mbit MRAM chip is a Spin Transfer Torque Magnetoresistive Random Access Memory(STT-MRAM)composed of two 32Mb dual-stack die,achieving 4bit I/O access through a 2×CS#/1×CLK configuration.
-Interface:Standard serial peripheral interface,supporting Mode 0/Mode 3;SDR 108MHz,DDR 54MHz
-XIP:Supports in-place read and write execution
-Protection:WP#pin write protection+block lock protection
-Identification:Unique ID+User-writable Serial Number
-Registers:Each individual non-volatile state,configuration,serial number,extended 512 bytes,extended byte protection register,and device ID
The EMI 64Mbit MRAM chip is packaged in a small 24-BGA format,compatible with similar non-volatile products,and the layout remains largely unchanged.Its operating temperature range covers the industrial grade from-40°C to 85°C.When powering on or off,it is important to note that during Vcc drop or shutdown,CS1#and CS2#must follow Vcc.It is recommended to add a 10KΩpull-up between Vcc and CS#.After the tPU ends,each chip needs to perform a software reset,and normal read and write operations should start after tSRST.For the first power-on after high-temperature reflow soldering,the configuration registers should be set at least once.
For teams seeking alternatives to Everspin,EMI's value extends beyond just supply:MRAM chips are battery-free and supercapacitor-free,maintaining their data upon power loss;their read and write performance is close to SRAM,yet they possess the non-volatile nature of Flash,making them suitable for scenarios such as parameter storage,code XIP,and power-down logging.RAMSUN serves as the original agent for EMI,offering storage chip selection and technical support.If you have product needs,please feel free to contact us.
Keywords：MRAM chip
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