MB85RC256V is a 32,768words × 8 bits FeRAM (Ferroelectric Random Access Memory) chip manufactured by FUJITSU SEMICONDUCTOR MEMORY SOLUTION. This posting will provide the OSS-ECAL(Open Source Software for Electronic Components Abstraction Layer) for MB85RC256V .
MCU interface : I2C
CAUTION:Please be sure to refer to the latest version of the Datasheet prior to actual design.
MB85RC256V
General description
The MB85RC256V is an FeRAM (Ferroelectric Random Access Memory) chip in a configuration of 32,768
words × 8 bits, using the ferroelectric process and silicon gate CMOS process technologies for forming the
nonvolatile memory cells.
Unlike SRAM, the MB85RC256V is able to retain data without using a data backup battery.
The read/write endurance of the nonvolatile memory cells used for the MB85RC256V has improved to be
at least 1012 cycles, significantly outperforming other nonvolatile memory products in the number.
The MB85RC256V does not need a polling sequence after writing to the memory such as the case of Flash
memory or E2PROM.
Feature
- Bit configuration : 32,768 words × 8 bits
- Two-wire serial interface : Fully controllable by two ports: serial clock (SCL) and serial data (SDA).
- Operating frequency : 1 MHz (Max)
- Read/write endurance : 1012 times / byte
- Data retention : 10 years ( + 85 °C), 95 years ( + 55 °C), over 200 years ( + 35 °C)
- Operating power supply voltage : 2.7 V to 5.5 V
- Low-power consumption : Operating power supply current 200 μA (Max @1 MHz) Standby current 27 μA (Typ)
- Operation ambient temperature range : − 40 °C to + 85 °C
- Package : 8-pin plastic SOP (150mil), 8-pin plastic SOP (208mil), Both are RoHS compliant
OSS-ECAL specification
API Function
This product provides the following command API functions.
etSTS oMB85RC256V_BYTE_WRITE( etCMP cmp, uint16 mem_adr, uint8 val )
Return value
Parameter IN
etSTS
etCMP cmp
uint16 mem_adr
uint8 val
OSS-ECAL status code
OSS-ECAL Components number codes
Memory address
Write data
Feature :
Command API function to write the value of val to the address specified by mem_adr.
Process :
1. Writes the value of val to the address specified in mem_adr.
Return value :
eSTS_FIN
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT
NOTE :
etSTS oMB85RC256V_PAGE_WRITE( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )
Return value
Parameter IN
etSTS
etCMP cmp
uint16 mem_adr
uint16 len
uint8* buf
OSS-ECAL status code
OSS-ECAL Components number codes
Memory address
Number of bytes to write
Data buffer to write
Feature :
Command API function that writes values from buf[0] to buf[len-1] in order from the address specified in mem_adr.
Process :
1. Write values from buf[0] to buf[len-1] in order from the address specified in mem_adr.
Return value :
eSTS_FIN
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT
NOTE :
If mem_adr + len > 0x7fff, the address rolls over to 0x0000.
etSTS oMB85RC256V_CURRENT_READ( etCMP cmp, uint8* rlt )
Return value
Parameter IN
Parameter OUT
etSTS
etCMP cmp
uint8* rlt
OSS-ECAL status code
OSS-ECAL Components number codes
Read data
Feature :
Command API function to read 1Byte value from the last Read or Write address +1 and save it to rlt.
Process :
1. Read 1Byte value from the last read or write address +1 and save it to rlt.
Return value :
eSTS_FIN
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT
NOTE :
If the last read or write address + 1 > 0x7fff, the address will roll over to 0x0000.
etSTS oMB85RC256V_RANDOM_READ( etCMP cmp, uint16 mem_adr, uint8* rlt )
Return value
Parameter IN
Parameter OUT
etSTS
etCMP cmp
uint16 mem_adr
uint8* rlt
OSS-ECAL status code
OSS-ECAL Components number codes
Memory address
Read data
Feature :
Command API function that reads 1 Byte worth of value from the address specified in mem_adr and saves it to rlt.
Process :
1. Read 1Byte worth of value from the address specified in mem_adr and save it to rlt.
Return value :
eSTS_FIN
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT
NOTE :
etSTS oMB85RC256V_SEQ_READ( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )
Return value
Parameter IN
Parameter OUT
etSTS
etCMP cmp
uint16 mem_adr
uint16 len
uint8* buf
OSS-ECAL status code
OSS-ECAL Components number codes
Memory address
Number of bytes to read
Data buffer to read
Feature :
Command API function that reads sequentially from the address specified in mem_adr and saves from buf[0] to buf[len-1].
Process :
1. Read in order from the address specified in mem_adr and save from buf[0] to buf[len-1].
Return value :
eSTS_FIN
eSTS_ERR_PARAMETER
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT
NOTE :
If mem_adr + len > 0x7fff, the address rolls over to 0x0000.
etSTS oMB85RC256V_DIAG_ID( etCMP cmp )
Return value
Parameter IN
etSTS
etCMP cmp
OSS-ECAL status code
OSS-ECAL Components number codes
Feature :
Command API function to diagnose Manufacture ID and Product ID.
Process :
1. Read the Manufacturer ID and Product ID.
2. Returns the comparison result of Manufacture ID = Fujitsu Semiconductor (0x00A) and Product ID = 0x510 as the return value.
True … eSTS_FIN
False … eSTS_ERR_DIAG
Return value :
eSTS_FIN
eSTS_ERR_DIAG
eSTS_ERR_HAL_I2C
eSTS_ERR_OTHERS_RUN
eSTS_ERR_I2C_OBJECT
NOTE :
etSTS oMB85RC256V_WP_EN( etCMP cmp )
Return value
Parameter IN
etSTS
etCMP cmp
OSS-ECAL status code
OSS-ECAL Components number codes
Feature :
Command API function to write protect enable (write disable).
Process :
1. Write protect output as “Hi”.
Return value :
eSTS_FIN
eSTS_ERR_GPIO_OBJECT
NOTE :
etSTS oMB85RC256V_WP_DIS( etCMP cmp )
Return value
Parameter IN
etSTS
etCMP cmp
OSS-ECAL status code
OSS-ECAL Components number codes
Feature :
Command API function to write protect disable (write enable).
Process :
1. Write protect output as “Low”.
Return value :
eSTS_FIN
eSTS_ERR_GPIO_OBJECT
NOTE :
Files
| Folder* | File | summary |
|---|---|---|
| MB85RC256V_HALNAME/sample | sample.c (.cpp) | Sample Application Program |
| | sample.h | Sample Application Header |
| MB85RC256V_HALNAME | oMB85RC256V.c (.cpp) | OSS-ECAL Program for MB85RC256V |
| | oMB85RC256V.h | OSS-ECAL Header for MB85RC256V |
| | oss_ecal.h | OSS-ECAL Common Header (Ver 01.01.00 or later) |
| | user_setting.c (.cpp) | Const and Table of User setting |
| | user_setting.h | Header of User setting |
| oHAL_i2c_stm32f4.c | HAL Program for STM32Cube FW_F4 | |
| oHAL_i2c_stm32f4.h | HAL Header for STM32Cube FW_F4 | |
| | readme.md | Readme |
| | OSS-ECAL Terms of Use.txt | OSS-ECAL Terms of Use |
* For HALNAME, please refer to HAL Support.
HAL Support List
| MCU/Board manufacturer | HAL | MCU* | Development environment* | HALNAME |
|---|---|---|---|---|
| Arduino | Arduino 1.8.6 | ATmega2560 ATmega328P | Mega 2560 Rev3 Arduino Pro Mini 3.3V | ARDUINO |
| ARM | Mbed 6.17.0 | STM32F401RETx | STM32 Nucleo-64 boards | MBED |
| Infineon | ModusToolbox HAL Cat1 2.4.3 | CYBLE-416045-02 | CY8CPROTO-063-BLE PSoC 6 BLE Prototyping Kit | ModusToolbox |
| NXP | MCUXpresso SDK iMXRT1051B_1052B ksdk2_0 | CYBLE-416045-02 | IMXRT1050-EVKB | iMXRT1051B1052B |
| STM | STM32Cube FW_F4 V1.27.1 | STM32F401RETx | STM32 Nucleo-64 boards | STM32F4 |
* MCU and development environment at the time of development. Even if the same HAL is used, different MCUs and development environments may not work together.
OSS-ECAL Download
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| HAL | Download OSS-ECAL Ver |
|---|---|
| Arduino 1.8.6 | |
| Mbed 6.17.0 | |
| ModusToolbox HAL Cat1 2.4.3 | |
| MCUXpresso SDK iMXRT1051B_1052B ksdk2_0 | |
| STM32Cube FW_F4 V1.27.1 |
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If you are unable to download the File, please contact us and let us know the model number and HAL type. We will send you the file as an email attachment.
Built-in How to
Please refer to the following to incorporate API functions into your user program.
Pin A0, A1, and A2 should be set with the following code in user_setting.h.
// Device address Code bit2:A2, bit1:A1, bit0:A0
#define MB85RC256V_1 0b00000111For Infineon ModusToolbox HAL, set the I2C Timeout setting with the following code in user_setting.h. For details, see cyhal_i2c_master_write(), cyhal_i2c_master_read() Parameters timeout.
#define I2C_TIMEOUT 10U // Timeout[ms] For STM32Cube FW_F4 HAL, I2C Timeout time is 25ms.
Note :
For the following command API functions, the Timeout time varies depending on the Read/Write data length len.
etSTS oMB85RC256V_WRITE_PAGE( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )
etSTS oMB85RC256V_READ_SEQ( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )
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