Texas Instruments SimpleLink CC2620 Technical Reference Manual page 686

Bootloader Interfaces
8.2.3.12 COMMAND_SET_CCFG
The COMMAND_SET_CCFG command is sent to the bootloader to configure the defined fields in the
flash CCFG area that are read by the ROM boot FW. The command sends the ACK signal in response to
the command after the actual flash program operation is performed. This command does not execute any
erase operation before the write operation.
The command consists of two 32-bit values that are all transferred MSB first. The first 32-bit value is the
CCFG Field ID, which identifies the CCFG parameter to be written, and the second 32-bit value is the
Field Value to be programmed. The command handler masks out Field Value bits not corresponding to the
CCFG parameter size.
NOTE: The COMMAND_SET_CCFG command can only change CCFG parameter value bits from 1
to 0.
Attempting to change any bit from 0 to 1 results in an error status that can be observed by a
following COMMAND_GET_STATUS command.
The only way to change CCFG parameter value bits from 0 to 1 is by erasing the complete CCFG flash
sector. The command sends the ACK signal in response to the command after the actual flash
programming has terminated.
The programming operation fails if the CCFG area (flash top sector) is write-protected by the protect bit in
FCFG1 and/or CCFG itself.
The format of the packet including the command is as follows:
unsigned char ucCommand[11];
ucCommand[0] = <size=11>;
ucCommand[1] = <checksum>;
ucCommand[2] = COMMAND_SET_CCFG;
ucCommand[3] = Field Id[31:24];
ucCommand[4] = Field Id[23:16];
ucCommand[5] = Field Id[15:8];
ucCommand[6] = Field Id[7:0];
ucCommand[7] = Field Value[31:24];
ucCommand[8] = Field Value[23:16];
ucCommand[9] = Field Value[15:8];
ucCommand[10] = Field Value[7:0];
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Bootloader
Copyright © 2015, Texas Instruments Incorporated
SWCU117C – February 2015 – Revised September 2015
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