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2 User Interface
2.4 Boot End Address

This component is used to allow 8-bit PIC devices to configure where the bootloader section of Flash stops and the end application space begins.

1 MCC Melody Bootloader: 8-bit
2 User Interface
- 2.1 Communication Protocol
  
  This component is used to configure which communication protocol is being used for data transfer between the Bootloader and the Host application.
- 2.2 I/O Pins
  
  These components are used to enable the I/O operations that the bootloader implements during execution.
- 2.3 Memory Verification Selector
  
  This component is used to set the verification method used for application verification.
- 2.4 Boot End Address
  
  This component is used to allow 8-bit PIC devices to configure where the bootloader section of Flash stops and the end application space begins.
- 2.5 Software Protection
  
  This component is used to activate a software method for write-protecting the bootloader section of Flash for 8-bit PIC devices.
- 2.6 Erase Type
  
  This component is used to configure the erase size for the bootloader’s erase action.
- 2.7 Optional Commands
  
  This section of the UI is used to initialize optional commands that the bootloader supports but does not require for basic operation.
3 Unified Bootloader Host Application (UBHA)
4 Use Case Examples

This section explains how to configure various bootloaders using MPLAB® X IDE and MCC Melody.
5 Verification Schemes
This section discusses the various methods of application verification provided to the users by the bootloader module.
6 Bootload Communication Protocol: 8-bit
7 References
Microchip Information

2.4 Boot End Address

This component is used to allow 8-bit PIC devices to configure where the bootloader section of Flash stops and the end application space begins.

Description:If the address range that the bootloader code is written to is not specified when the application code is large enough, the code will corrupt the data needed to operate the bootloader. This is also a concept that is important to understand to help prevent any malicious writing actions on the bootloader code space. This component is used to set the boot address range to prevent the 8-bit PIC memory drivers from attempting to write in the Boot section of Flash. The number the user will input becomes the end of the address range that is provisioned for the bootloader code starting at 0x00 and going until BootEndAddress - 1 in hexadecimal.

Example: To configure this setting, type in the address value where the boot space needs to end. An error message is displayed when entering a value outside of the displayed range. The input box will be updated to a hexadecimal format. It is recommended to use a 0xXX format for hexadecimal values.

Note: This value needs to be placed on a page boundary, otherwise the bootloader will become corrupted .

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.