AWR1843: QSPI Serial Flash Configuartions

Hello Rajesh, 

Chapter 25 of AWR18xx/16xx/14xx/68xx Technical Reference Manual (Rev. E) effectively brings out the differences between the two QSPI modes. 

To start off, the configuration port essentially provides access to all the QSPI registers. These are the configuration and the four data registers. The configuration registers are used to configure typical SPI and serial flash memory settings and the four data registers are used for read and write operations.

Now commands can be sent through the configuration port to communicate with a serial flash device; however, it is easier to do this using the memory mapped mode because it is intended to ease the communication with serial flash devices. It provides a direct interface for accessing data and thus simplifying software requirements.

As indicated, more details can be found in the TRM document linked above.To be specific, I would recommend, sections 25.2.1, 25.2.1.1, 25.2.1.2 and 25.4.4.

Let me know if your concern still remains and I will help you understand that. 

Regards,

Ishita