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FUJITSU SEMICONDUCTOR

FACT SHEET

2013.5 1/2

NP501-00019-2v0-E

FRAM

MB85RC256V

MB85RC256V is a 256K-bits FRAM with serial interface (I

C), using the ferroelectric

process and CMOS process technologies for forming the nonvolatile memory cells.

Because FRAM is able to write high-speed even though a nonvolatile memory,

it is suitable for the log management and the storage of the resume data, etc.

FEATURES

Bit configuration

32,768 words × 8 bits

Two-wire serial interface

Fully controllable by two ports through serial clock (SCL) and serial data (SDA).

Operating frequency

1 MHz (Max.)

Read/write endurance

times / byte

Data retention

10 years ( + 85 °C), 95 years ( + 55 °C), over 200 years ( + 35 °C)

Operating power supply voltage

2.7V to 5.5V

Low power consumption

Operating current 200 A (Max. @1MHz),

Standby current 27 A (Typ.)

Operation ambient temperature range

40 °C to + 85 °C

Package

8-pin plastic SOP (FPT-8P-M02)

8-pin plastic SOP (FPT-8P-M08)

RoHS compliant

ORDERING INFORMATION

PACKAGE EXAMPLE

Product name Package Shipping form

MB85RC256VPNF-G-JNE1

8-pin plastic SOP

(FPT-8P-M02)

3.90mm×5.05mm,1.27mm pitch

Tube

MB85RC256VPNF-G-JNERE1 Embossed Carrier tape

MB85RC256VPF-G-JNE2

8-pin plastic SOP

(FPT-8P-M08)

5.30mm×5.24mm,1.27mm pitch

Tube

MB85RC256VPF-G-JNERE2 Embossed Carrier tape

8-pin plastic SOP

(FPT-8P-M02)

8-pin plastic SOP

(FP

-8P-M08)

Summary of content (19 pages)

PAGE 1
FUJITSU SEMICONDUCTOR FACT SHEET NP501-00019-2v0-E FRAM MB85RC256V MB85RC256V is a 256K-bits FRAM with serial interface (I2C), using the ferroelectric process and CMOS process technologies for forming the nonvolatile memory cells. Because FRAM is able to write high-speed even though a nonvolatile memory, it is suitable for the log management and the storage of the resume data, etc.
PAGE 2
MB85RC256V PIN ASSIGNMENT (TOP VIEW) (FPT-8P-M02) (FPT-8P-M08) Pin No. Pin name 1 to 3 A0 to A2 4 VSS 5 SDA 6 SCL 7 WP 8 VDD Description Device Address pins MB85RC256V can be connected to the same data bus up to 8 devices. Device addresses are used in order to identify each of these devices. Connect these pins to VDD pin or VSS pin externally. Only if the combination of VDD and VSS pin matches a Device Address Code inputted from the SDA pin, the device operates.
PAGE 3
Adafruit I2C FRAM Breakout Created by lady ada Last updated on 2014-06-28 08:15:15 PM EDT
PAGE 4
Guide Contents Guide Contents 2 Overview 3 Pinouts 6 Power Pins: 6 I2C Logic pins: 6 Assembly 8 Prepare the header strip: 8 Add the breakout board: 8 And Solder! 9 Wiring and Test 11 Arduino Wiring 11 Download Adafruit_FRAM_I2C 12 Load Demo 13 Library Reference 14 Downloads 16 Schematics 16 Fabrication Print 16 © Adafruit Industries https://learn.adafruit.
PAGE 5
Overview You're probably familiar with SRAM, DRAM, EEPROM and Flash but what about FRAM? FRAM is 'ferroelectric' RAM, which has some very interesting and useful properties. Unlike SRAM, FRAM does not lose the data when power is lost. In that sense it's a durable storage memory chip like Flash. However, it is much faster than Flash - and you don't have to deal with writing or erasing pages. © Adafruit Industries https://learn.adafruit.
PAGE 6
This particular FRAM chip has 256 Kbits (32 KBytes) of storage, interfaces using I2C, and can run at up to 1MHz I2C rates. Each byte can be read and written instantaneously (like SRAM) but will keep the memory for 95 years at room temperature. Each byte can be read/written 10,000,000,000,000 times so you don't have to worry too much about wear leveling. © Adafruit Industries https://learn.adafruit.
PAGE 7
With the best of SRAM and Flash combined, this chip can let you buffer fairly-high speed data without worrying about data-loss. © Adafruit Industries https://learn.adafruit.
PAGE 8
Pinouts The FRAM chip is the little guy in the middle. On the bottom we have the power and interface pins Power Pins: VCC - this is the power pin. Since the chip uses 3-5VDC you should pick whatever the logic voltage you're using. For most Arduino's that's 5V. GND - common ground for power and logic I2C Logic pins: WP - Write Protect pin. This is used to force write protection so you cannot write to the FRAM. It has an internal pulldown.
PAGE 9
SDA - I2C data pin, connect to your microcontrollers I2C data line. A2, A1, A0 - These are the I2C address selection pins. By default the I2C address is 0x50. Connecting these pins to VCC and power cycling the chip will adjust the lower three bits of the address. For example, if A0 is high, the address is 0x51. If A1 and A2 are high, the address is 0x56 © Adafruit Industries https://learn.adafruit.
PAGE 10
Assembly Prepare the header strip: Cut the strip to length if necessary. It will be easier to solder if you insert it into a breadboard - lo ng pins do wn Add the breakout board: Place the breakout board over the pins so that the short pins poke through the breakout pads © Adafruit Industries https://learn.adafruit.
PAGE 11
And Solder! Be sure to solder all pins for reliable electrical contact. (For tips on soldering, be sure to check out our Guide to Excellent Soldering (http://adafru.it/aTk)). © Adafruit Industries https://learn.adafruit.
PAGE 12
You're done! Check your solder joints visually and continue onto the next steps © Adafruit Industries https://learn.adafruit.
PAGE 13
Wiring and Test Arduino Wiring You can easily wire this breakout to any microcontroller, we'll be using an Arduino © Adafruit Industries https://learn.adafruit.
PAGE 14
Connect Vcc to the power supply, 3V or 5V is fine. Use the same voltage that the microcontroller logic is based off of. For most Arduinos, that is 5V Connect GND to common power/data ground Connect the SCL pin to the I2C clock SCL pin on your Arduino. On an UNO & '328 based Arduino, this is also known as A5, on a Mega it is also known as digital 21 and on a Leonardo/Micro, digital 3 Connect the SDA pin to the I2C data SDA pin on your Arduino.
PAGE 15
Download Adafruit FRAM i2c Library http://adafru.it/dtr Rename the uncompressed folder Adafruit_FRAM_I2C and check that the Adafruit_FRAM_I2C folder contains Adafruit_FRAM_I2C.cpp and Adafruit_FRAM_I2C.h Place the Adafruit_FRAM_I2C library folder your arduino sketchfo lder/libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE. We also have a great tutorial on Arduino library installation at: http://learn.adafruit.
PAGE 16
written to location #0 in the memory, prints that out and write that value + 1 back to location #0. This acts like a restart-meter: every time the board is reset the value goes up one so you can keep track of how many times its been restarted. Afterwards, the Arduino prints out the value in every location (all 256KB!) Library Reference The library we have is simple and easy to use You can create the FRAM object with © Adafruit Industries https://learn.adafruit.
PAGE 17
Adafruit_FRAM_I2C fram = Adafruit_FRAM_I2C(); Then when you begin(), pass in the i2c address. The default is 0x50 so if you don't put any value in the default is used. If you have different addresses, call something like fram.begin(0x53) for example. Then to write a value, call fram.write8(address, byte-value); to write an 8-bit value to the address location Later on of course you can also read with fram.read8(address); which returns a byte reading. © Adafruit Industries https://learn.adafruit.
PAGE 18
Downloads Datasheet for the MB85RC256VPF FRAM chip (http://adafru.it/dt7) Schematics Fabrication Print © Adafruit Industries https://learn.adafruit.