Rockpi4/hardware/spi flash - Revision history

Marcone: fix typo

2022-06-21T15:42:28Z

fix typo

Stephen: /* Solder manually */

2019-07-30T10:44:57Z

‎Solder manually

Stephen: /* Solder manually */

2019-06-24T01:28:18Z

‎Solder manually

Hipboi: Created page with "{{rockpi4_header}} {{Languages|rockpi4/hardware/spi_flash}} ROCK Pi 4 > Hardware > SPI Flash == Int..."

2019-05-15T04:33:12Z

Created page with "{{rockpi4_header}} {{Languages|rockpi4/hardware/spi_flash}} ROCK Pi 4 > Hardware > SPI Flash == Int..."

New page

{{rockpi4_header}}
{{Languages|rockpi4/hardware/spi_flash}}

[[rockpi4 | ROCK Pi 4]] > [[rockpi4/hardware | Hardware]] > [[rockpi4/hardware/spi_flash | SPI Flash]]

== Introduction ==
RK3399 can boot from SPI/SD card/eMMC, the SPI buses for booting is SPI1. On ROCK Pi 4 V1.3 and earlier, the design has included the SPI flash but it was not soldered. There are several reasons:

[[File:Rockpi4_spi_flash.png | 600px]]

* The SPI is also exported on the 40PIN GPIO header, if we use it as boot rom, then we will not able to use the SPI bus on the GPIO header
* If the bootloader in the SPI flash corrupted, it will ''brick'' the ROCK Pi 4, which is hardware for normal user to recover.
* The bootloader doesn't support booting from USB3 or NVMe before and there are tools missing to write to SPI flash easily.

== Solder manually ==

Some advanced users may want to solder the SPI flash by themself. The footprint for the SPI flash is SOP8, the voltage level is 3.3V. The size should be larger than 4MB(32Mbit) to store the bootloader. The verified working models are:

* W25Q64FV

[[File:Rockpi4_spi_flash_mount.png | 500px]]

@@ Line 20: / Line 20: @@
 * GD25Q127CSIG
 * XT25F32B
 [[File:Rockpi4_spi_flash_mount.png | 500px]]

← Older revision		Revision as of 01:28, 24 June 2019
Line 18:		Line 18:

	* W25Q64FV		* W25Q64FV
		+	* GD25Q127CSIG
		+	* XT25F32B

	[[File:Rockpi4_spi_flash_mount.png \| 500px]]		[[File:Rockpi4_spi_flash_mount.png \| 500px]]

@@ Line 10: / Line 10: @@
 * The SPI is also exported on the 40PIN GPIO header, if we use it as boot rom, then we will not able to use the SPI bus on the GPIO header
-* If the bootloader in the SPI flash corrupted, it will ''brick'' the ROCK Pi 4, which is hardware for normal user to recover.
+* If the bootloader in the SPI flash corrupted, it will ''brick'' the ROCK Pi 4, which is hard for normal user to recover.
 * The bootloader doesn't support booting from USB3 or NVMe before and there are tools missing to write to SPI flash easily.