Configure and Program OTP#
OTP Overview#
The K230/K230D integrates an internal One-Time Programmable (OTP) device. This device can store permanently bound information such as MAC addresses and boot parameters. Boot configuration is typically stored here.
WARNING: Programming incorrect OTP values, or a firmware voltage configuration that does not match the hardware, may permanently damage the chip!
Automatically Generate an OTP Configuration .bin File#
Canaan provides a convenient graphical web interface for automatically generating OTP configuration .bin files. During this process, be sure to communicate fully with your hardware engineer to confirm the exact hardware settings, voltage levels, and other critical information.
Configuration tool: OTP Configuration Tool
When generating the .bin file, carefully select the appropriate settings based on the hardware schematic:
BOOT ROM UART IOMUX — selects the UART port used for BOOT log output (UART0 is recommended)
BOOT ROM UART voltage — voltage level used by the boot UART
OSPI IO voltage — voltage of the OSPI domain
SDIO0 IO voltage — voltage of the MMC0 domain
SDIO1 IOMUX — pin selection for MMC1
SDIO1 IO voltage — voltage of the MMC1 domain
The following images use the 01Studio development board schematic as an example:
Important reminder: Double-check the configuration accuracy with your hardware engineer. Once incorrect values are programmed, the chip will be permanently damaged and cannot be repaired.
After completing all settings, click the Generate Configuration File button to generate a .bin file, as shown below:
Flash the OTP .bin File#
Flashing tool download: Kendryte Developer Community – Downloads
Select the version corresponding to your operating system. Also note: do not power the board for an extended period before OTP programming is complete, as this may damage the chip.
Power on the chip, connect the UART0 interface, open the BurningTool software, and select the previously generated .bin file:
Click the Start button and wait for the programming process to complete:
Once programming is finished, click Confirm.