SPRADL4 January   2025 F29H850TU , F29H859TU-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Introduction
  5. 2 Differences Between EEPROM and On-Chip Flash
  6. 3 Overview
    1. 3.1 Basic Concepts
    2. 3.2 Single-Unit Method
    3. 3.3 Ping-Pong Method
    4. 3.4 Creating EEPROM Sections (Pages) and Page Identification
  7. 4 Software Description
    1. 4.1 Software Functionality and Flow
  8. 5 Single-Unit Emulation
    1. 5.1 User Configuration
      1. 5.1.1 EEPROM_Config.h
      2. 5.1.2 F29H85x_EEPROM.c
    2. 5.2 EEPROM Functions
      1. 5.2.1 Initialization and Setup Functions
        1. 5.2.1.1 Configure_Device
        2. 5.2.1.2 EEPROM_Config_Check
      2. 5.2.2 Page Mode Functions
        1. 5.2.2.1 EEPROM_GetValidBank
        2. 5.2.2.2 EEPROM_UpdateBankStatus
        3. 5.2.2.3 EEPROM_UpdatePageStatus
        4. 5.2.2.4 EEPROM_UpdatePageData
        5. 5.2.2.5 EEPROM_Write_Page
      3. 5.2.3 64-Bit Mode Functions
        1. 5.2.3.1 EEPROM_64_Bit_Mode_Check_EOS
        2. 5.2.3.2 EEPROM_Write_64_Bits
      4. 5.2.4 Functions Used in Both Modes
        1. 5.2.4.1 EEPROM_Erase
        2. 5.2.4.2 EEPROM_Read
      5. 5.2.5 Utility Functions
        1. 5.2.5.1 EEPROM_Write_Buffer
        2. 5.2.5.2 Erase_Bank
        3. 5.2.5.3 Set_Protection_Masks
        4. 5.2.5.4 Configure_Protection_Masks
        5. 5.2.5.5 Fill_Buffer
        6. 5.2.5.6 ClearFSMStatus
    3. 5.3 Testing Example
  9. 6 Ping-Pong Emulation
    1. 6.1 User-Configuration
      1. 6.1.1 EEPROM_PingPong_Config.h
      2. 6.1.2 F29H85x_EEPROM_PingPong.c
    2. 6.2 EEPROM Functions
      1. 6.2.1 Initialization and Setup Functions
        1. 6.2.1.1 Configure_Device
        2. 6.2.1.2 EEPROM_Config_Check
      2. 6.2.2 Page Mode Functions
        1. 6.2.2.1 EEPROM_GetValidBank
        2. 6.2.2.2 EEPROM_UpdateBankStatus
        3. 6.2.2.3 EEPROM_UpdatePageStatus
        4. 6.2.2.4 EEPROM_UpdatePageData
        5. 6.2.2.5 EEPROM_Write_Page
      3. 6.2.3 64-Bit Mode Functions
        1. 6.2.3.1 EEPROM_64_Bit_Mode_Check_EOS
        2. 6.2.3.2 EEPROM_Write_64_Bits
      4. 6.2.4 Functions Used in Both Modes
        1. 6.2.4.1 EEPROM_Erase_Inactive_Unit
        2. 6.2.4.2 EEPROM_Read
        3. 6.2.4.3 EEPROM_Erase_All
      5. 6.2.5 Utility Functions
        1. 6.2.5.1 EEPROM_Write_Buffer
        2. 6.2.5.2 Erase_Bank
        3. 6.2.5.3 Configure_Protection_Masks
        4. 6.2.5.4 Set_Protection_Masks
        5. 6.2.5.5 Fill_Buffer
        6. 6.2.5.6 ClearFSMStatus
    3. 6.3 Testing Example
  10. 7 Application Integration
  11. 8 Flash API
    1. 8.1 Flash API Checklist
      1. 8.1.1 Flash API Do's and Do Not's
  12. 9 Source File Listing
  13. 10Troubleshooting
    1. 10.1 General
  14. 11Conclusion
  15. 12References

5.2.3.2 EEPROM_Write_64_Bits

The EEPROM_Write_64_Bits() function provides functionality for programming eight bytes to memory. The first parameter, Num_Bytes, allows the user to specify how many valid words are written. The data words are assigned to the first indices of the Write_Buffer. If less than eight bytes are specified in the function call, missing bytes are filled with 0xFF. This is done to comply with ECC requirements.

First, the program checks if the EEPROM is full.

EEPROM_64_Bit_Mode_Check_EOS();

Next, the Write Buffer is filled with 1s if less than 8 bytes are specified.

uint8_t i;
for (i = Num_Bytes; i < WRITE_SIZE_BYTES; i++)
{
    Write_Buffer[i] = 0xFF;
}

Then, the data is programmed and the pointer is incremented to the next empty location

EEPROM_Write_Buffer(Bank_Pointer, Write_Buffer);

Empty_EEPROM = 0;

Bank_Pointer += WRITE_SIZE_BYTES;
Note: This function cannot be used until RESET_BANK_POINTER has been executed to set the pointer. Executing before this will produce unknown results.