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Copy NXP Microprocessor PXAG27 Flash Program needs to know how to programming the flash memory.

The XA-G27 Flash microcontroller supports a number of programming possibilities for the on-chip Flash memory. The Flash memory may be programmed in a parallel fashion on standard programming equipment in a manner similar to an EPROM microcontroller.

The XA-G27 microcontroller is able to program its own Flash memory while the application code is running which is the same features we can manipulated when Unlock NXP MCU PXAG17 Protected Flash. Also, a default loader built into a Boot ROM allows programming blank devices serially through the UART.

Copy NXP Microprocessor PXAG27 Flash Program

Using any of these types of programming, any of the individual blocks may be erased separately, or the entire chip may be erased. Programming of the Flash memory is accomplished one byte at a time.

When the microcontroller programs its own Flash memory, all of the low level details are handled by code that is permanently contained in a 2k byte “Boot ROM” that is separate from the Flash memory which can be extracted from MCU.

A user program simply calls the entry point with the appropriate parameters to accomplish the desired operation. Boot ROM operations include things like: erase block, program byte, verify byte, program security lock bit, etc.

The Boot ROM overlays the program memory space at the top of the address space from F800 to FFFF hex, when it is enabled by setting the ENBOOT bit at AUXR1.7 after Copy NXP Microprocessor PXAG27 Flash Program

The Boot ROM may be turned off so that the upper 2k bytes of Flash program memory are accessible for execution.