Visible to Intel only — GUID: mej1481129972132
Ixiasoft
Visible to Intel only — GUID: mej1481129972132
Ixiasoft
15.5.2.4.1. Read-Modify-Write Operation Flow
- Start the flow by reading a page from the memory:
- Write to the command register, setting the CMD_MAP field to 2 and the BLK_ADDR field to the starting address of the desired block.
- Write 0x60 to the Data register.
This step makes the page available to you in the page buffer in the flash device. - Provide the destination page address:
- Write to the command register, setting the CMD_MAP field to 2 and the BLK_ADDR field to the destination address of the desired block.
- Write 0x61 to the Data register.
This step initiates the page program and provides the destination address to the device. - Use the MAP00 page buffer read and write commands to modify the data in the page buffer.
- Write the page buffer data back to memory:
- Write to the command register, setting the CMD_MAP field to 2 and the BLK_ADDR field to the same destination address.
- Write 0x62 to the Data register.
This step performs the write.
After the device completes the load operation, the NAND flash controller issues a load_comp interrupt. A program_comp interrupt is issued when the host issues the write command and the device completes the program operation.
If the page program operation (as a part of an RMW operation) results in a program failure in the device, program_fail interrupt is issued. The failing page's block and page address is updated in the err_block_addr0 and err_page_addr0 registers in the status group.