SWRA466D February   2015  – August 2021 CC1310 , CC1310 , CC1352R , CC1352R , CC2538 , CC2538 , CC2620 , CC2620 , CC2630 , CC2630 , CC2640 , CC2640 , CC2640R2F , CC2640R2F , CC2640R2F-Q1 , CC2640R2F-Q1 , CC2642R , CC2642R , CC2642R-Q1 , CC2642R-Q1 , CC2650 , CC2650 , CC2650MODA , CC2650MODA , CC2652R , CC2652R , CC2652R7 , CC2652R7 , CC2652RB , CC2652RB , CC2652RSIP , CC2652RSIP

 

  1.   Trademarks
  2. 1Introduction
  3. 2ROM Bootloader
    1. 2.1 Configuring the Bootloader
      1. 2.1.1 CC2538
      2. 2.1.2 CC26x0
    2. 2.2 CC26x2
    3. 2.3 Communication Protocol
      1. 2.3.1 ACK/NACK
    4. 2.4 Interface Configuration
      1. 2.4.1 Hardware Pins
      2. 2.4.2 UART Configuration
      3. 2.4.3 Establishing Communication
      4. 2.4.4 Status Command
  4. 3Serial Bootloader Library (SBL)
    1. 3.1 SBL Return Values
    2. 3.2 SBL API
      1. 3.2.1 Device-Specific Functions
  5. 4Example Project
    1. 4.1 Hardware Setup
      1. 4.1.1 SmartRF06EB Virtual COM Port
        1. 4.1.1.1 External Serial Interface
      2. 4.1.2 LaunchPad Virtual COM Port
      3. 4.1.3 Bootloader Backdoor
    2. 4.2 Software Setup
      1. 4.2.1 Device Type
      2. 4.2.2 Baud Rate
    3. 4.3 Program Flow
      1. 4.3.1 Enumerate COM Ports
      2. 4.3.2 Create Device
      3. 4.3.3 Connect
      4. 4.3.4 Erase Flash Range
      5. 4.3.5 Write Flash Range
      6. 4.3.6 Calculate CRC32
      7. 4.3.7 Reset
  6. 5References
  7. 6Revision History

2.2 CC26x2

The customer configuration area for CC26x2 is called CCFG and is located in the uppermost flash sector. The CC26x2 devices have one flash size, 352 KB, and the bootloader configuration absolute address is 0x0005.7FD8. The CC26x2 CCFG is also memory mapped with read access to address 0x5000.3000. A 32-bit field in the CCFG configures the bootloader and backdoor functionality (byte offset 0x1FD8).

The structure of the bootloader configuration field is shown in Table 2-4. The configuration structure is little endian, meaning that the least significant byte is at the lowest address. Select which pin to use by writing the DIO number to the second byte of the configuration structure.

Table 2-4 CC26x2 CCFG:BL_CONFIG Encoding
BitFieldValueDescriptionByte
Offset		Default
Value
31:24BOOTLOADER_ENABLEEnable and disable bootloader0x1FDB0xC5
0xC5Bootloader enabled
Any other valueBootloader disabled
23:17RESERVED00x1FDA0b111 1111
16BL_LEVELSets the active level of the selected pin.0x1FDA1
0Active low
1Active high
15:8BL_PIN_NUMBERThe number of the I/O pin that is level checked if the bootloader backdoor is enabled.0x1FD90xFF
7:0BL_ENABLEEnables and disables the bootloader backdoor.0x1FD80xFF
0xC5Bootloader enabled
Any other valueBootloader disabled