MB85RC256V

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

etSTS oMB85RC256V_BYTE_WRITE( etCMP cmp, uint16 mem_adr, uint8 val )

The oMB85RC256V_BYTE_WRITE function is an API function that writes the value of val to the specified address mem_adr for MB85RC256V.

NOTE:
Please use the oMB85RC256V_WP_DIS function to release write-protection before using this function.

Return value	etSTS	OSS-ECAL status code
		eSTS_FIN	Completed successfully
		eSTS_ERR_PARAMETER	Parameter error(Memory address)
		eSTS_ERR_I2C_OBJECT	I2C object selection error
		eSTS_ERR_OTHERS_RUN	Other components are executing the process
		eSTS_ERR_HAL_OTHERS_RUN	Other application is running HAL
		eSTS_ERR_HAL_I2C	HAL I2C error
Parameter IN	etCMP cmp	OSS-ECAL components code
	uint16 mem_adr	Memory address	0x0000 to 0x7fff
	uint8 val	Data to write

etSTS oMB85RC256V_PAGE_WRITE( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )

The oMB85RC256V_PAGE_WRITE function is an API function that writes the values buf[0] through buf[len-1] for the MB85RC256V in order from the specified address mem_adr.

NOTE :
If mem_adr + len > 0x7fff, the address rolls over to 0x0000.

Return value	etSTS	OSS-ECAL status code
		eSTS_FIN	Completed successfully
		eSTS_EXE	During execution
		eSTS_ERR_PARAMETER	Parameter error(Memory address)
		eSTS_ERR_I2C_OBJECT	I2C object selection error
		eSTS_ERR_OTHERS_RUN	Other components are executing the process
		eSTS_ERR_HAL_OTHERS_RUN	Other application is running HAL
		eSTS_ERR_HAL_I2C	HAL I2C error
Parameter IN	etCMP cmp	OSS-ECAL components code
	uint16 mem_adr	Memory address	0x0000 to 0x7fff
	uint16 len	Number of bytes to write
	uint8* buf	Data buffer to write

etSTS oMB85RC256V_CURRENT_READ( etCMP cmp, uint8* rlt )

The oMB85RC256V_CURRENT_READ function is an API function that reads the value of 1 byte from the last Read or Write address + 1 for the MB85RC256V and stores it in rlt.

NOTE :
If the last read or write address + 1 > 0x7fff, the address will roll over to 0x0000.

Return value	etSTS	OSS-ECAL status code
		eSTS_FIN	Completed successfully
		eSTS_ERR_I2C_OBJECT	I2C object selection error
		eSTS_ERR_OTHERS_RUN	Other components are executing the process
		eSTS_ERR_HAL_OTHERS_RUN	Other application is running HAL
		eSTS_ERR_HAL_I2C	HAL I2C error
Parameter IN	etCMP cmp	OSS-ECAL components code
Parameter OUT	uint8* rlt	Data to read

etSTS oMB85RC256V_RANDOM_READ( etCMP cmp, uint16 mem_adr, uint8* rlt )

The oMB85RC256V_RANDOM_READ function is an API function that reads a 1-byte value from a specified address mem_adr for the MB85RC256V and stores it in rlt.

NOTE :

Return value	etSTS	OSS-ECAL status code
		eSTS_FIN	Completed successfully
		eSTS_ERR_PARAMETER	Parameter error(Memory address)
		eSTS_ERR_I2C_OBJECT	I2C object selection error
		eSTS_ERR_OTHERS_RUN	Other components are executing the process
		eSTS_ERR_HAL_OTHERS_RUN	Other application is running HAL
		eSTS_ERR_HAL_I2C	HAL I2C error
Parameter IN	etCMP cmp	OSS-ECAL components code
	uint16 mem_adr	Memory address	0x0000 to 0x7fff
Parameter OUT	uint8* rlt	Data to read

etSTS oMB85RC256V_SEQ_READ( etCMP cmp, uint16 mem_adr, uint16 len, uint8* buf )

The oMB85RC256V_SEQ_READ function is an API function that reads data for len from the specified address mem_adr for the MB85RC256V in sequence and stores the data from buf[0] to buf[len-1].

NOTE :
If mem_adr + len > 0x7fff, the address rolls over to 0x0000.

Return value	etSTS	OSS-ECAL status code
		eSTS_FIN	Completed successfully
		eSTS_ERR_PARAMETER	Parameter error(Memory address)
		eSTS_ERR_I2C_OBJECT	I2C object selection error
		eSTS_ERR_OTHERS_RUN	Other components are executing the process
		eSTS_ERR_HAL_OTHERS_RUN	Other application is running HAL
		eSTS_ERR_HAL_I2C	HAL I2C error
Parameter IN	etCMP cmp	OSS-ECAL components code
	uint16 mem_adr	Memory address	0x0000 to 0x7fff
	uint16 len	Number of bytes to read
Parameter OUT	uint8* buf	Data to read

etSTS oMB85RC256V_DIAG_ID( etCMP cmp )

The oMB85RC256V_DIAG_ID function is an API function that reads the Manufacture ID and Product ID and returns the comparison result of Manufacture ID = Fujitsu Semiconductor (0x00A) and Product ID = 0x510 as the return result.

NOTE :

Return value	etSTS	OSS-ECALステータスコード
		eSTS_FIN	Comparison Results True
		eSTS_ERR_DIAG	Comparison Results False
		eSTS_ERR_I2C_OBJECT	I2C object selection error
		eSTS_ERR_OTHERS_RUN	Other components are executing the process
		eSTS_ERR_HAL_OTHERS_RUN	Other application is running HAL
		eSTS_ERR_HAL_I2C	HAL I2C error
Parameter IN	etCMP cmp	OSS-ECAL components code

etSTS oMB85RC256V_WP_EN( etCMP cmp )

The oMB85RC256V_WP_EN function is an API function that outputs Write protect enable (write disable) = “Hi” for the MB85RC256V.

NOTE :

Return value	etSTS	OSS-ECAL status code
		eSTS_FIN	Completed successfully
		eSTS_ERR_GPIO_OBJECT	GPIO object selection error
Parameter IN	etCMP cmp	OSS-ECAL components code

etSTS oMB85RC256V_WP_DIS( etCMP cmp )

The oMB85RC256V_WP_DIS function is an API function that outputs Write protect disable (write enable) = “Low” for the MB85RC256V.

NOTE :

Return value	etSTS	OSS-ECAL status code
		eSTS_FIN	Completed successfully
		eSTS_ERR_GPIO_OBJECT	GPIO object selection error
Parameter IN	etCMP cmp	OSS-ECAL components code

Files

Folder^*	File	summary
MB85RC256V_HALNAME_VERSION/sample	sample.c (.cpp)	Sample Application Program
	sample.h	Sample Application Header
MB85RC256V_HALNAME_VERSION	oMB85RC256V.c (.cpp)	OSS-ECAL Program for MB85RC256V
	oMB85RC256V.h	OSS-ECAL Header for MB85RC256V
	MB85RC256V_ARDUINO.ino	Sample application programs for Arduino
	oss_ecal.h	OSS-ECAL Common Header (Ver 01.00.00 or later, AUTOSAR is Ver 01.01.07 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

HAL	MCU*	Development environment*	HALNAME
Arduino 1.8.6	ATmega2560 ATmega328P	Mega 2560 Rev3 Arduino Pro Mini 3.3V	ARDUINO
ARM Mbed 6.17.0	STM32F401RE	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	MIMXRT1052DVL6A	IMXRT1050-EVKB	iMXRT1051B1052B
STM STM32Cube FW_F4 V1.27.1	STM32F401RE	STM32 Nucleo-64 boards	STM32F4
Debian(Linux) v2022.04	TI AM335x	BeagleBone Black – Rev C	Linux

* 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.

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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            0b00000111

For 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 )

How to incorporate OSS-ECAL into user programs

How to incorporate multiple OSS-ECALs in a user program (same MCU function)

How to incorporate multiple OSS-ECALs in a user program (different MCU function)

How to incorporate multiple identical electronic components into a user program

How to reduce the impact on user programs by replacing electronic components

CAUTION

The sample version of OSS-ECAL is not intended to be used with Threads (Tasks) or interrupts of different priority. Please do not use it as in the example below.

Example: If each sensor is assigned to the same ADC group and the OSS-ECAL API is executed in processes with different priorities, correct values may not be obtained.
ADC Gr0 Ch0　Temperature sensor AD22100A　100ms cycle Thread (low priority) to take in temperature
ADC Gr0 Ch1　Pressure sensor　　 MPX5999D　Event interrupts (high priority) to take pressure