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coreboot-kgpe-d16/Documentation/mainboard/roda/rk9/flash_header.md
Nico Huber 10490b98e2 mb/roda/rk9: Document flash header 
Change-Id: I5bd131635340ffa0c6b8979fc8e263fc5f09fdc5
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32025
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
2019-05-30 13:46:41 +00:00

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Roda RK9 Flash Header

There is a 5x2 pin, 1.27mm pitch header J1 south of the BIOS flash. It follows the pinout of the Dediprog adaptor board:

+------+
| 1  2 |    1: HOLD 2   2: CS 2
| 3  4 |    3: CS 1     4: VCC
| 5  6 |    5: MISO     6: HOLD 1
| 7  8 |    7:          8: CLK
| 9 10 |    9: GND     10: MOSI
+------+

Pins 3 to 10 directly map to the regular SPI flash pinout.

There is also a JP17 around. Ideally, it should be closed during programming (isolates the SPI bus from the southbridge):

+---+
| 1 |   1: SF100-I/O3
| 2 |   2: GND
+---+