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...-from-sd-card-or-flash-a-rom-with-phonixcard/ Boot from SD-Card or flash a ROM with PhonixCard]

== Boot ROM operation == After a hardware reset, the SoC's boot ROM (BROM) starts running on CPU0, one of the Cortex-A53s on the chip. This cod

...ot coexist, they will be mutually exclusive. This allows a different flash ROM map for each bootloader.

* ROM: 448KB * Internal ROM 448KB for critical constants and code

* Different MCU with more RAM and ROM, higher clock

The RK3566 boot ROM will search for a valid ID BLOCK in the following order on the support boot ... if this fails, the boot ROM will initialize the USB0 port and wait for a connection from the Rockchip

...ible with the current hardware (no physical reset button, no bootloader in ROM code,...), but let's try to reach 99.9% reliability :)

...d to brick a Pinecil doing a firmware update because of the firmware is in ROM. Usually, just re-flashing it fixes it. Even if the other firmware caused t ...iniware) is you can not really brick them since Pinecil's bootloader is in ROM. If there is a problem, just flash the firmware again or a different versio

* 128KB ROM

...very hard to brick a Pinecil because of the way the firmware is loaded in ROM. Usually just flashing again with a newer or different version brings it ba

* Set boot jumpers for booting from rom: Boot0=1, Boot1=0.

The RK3399's mask 32KB ROM boot code looks for the next stage of code at byte off-set 32768, (sector 6 ...or an SD card. It cannot boot from USB-C. The boot order of the hard-coded ROM of its RK3399 SoC is: SPI NOR, eMMC, SD, USB OTG.

** 192KB Internal ROM