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>
This commit is contained in:
Nico Huber 2019-03-21 23:17:06 +01:00
parent 2b99a01e0d
commit 10490b98e2
2 changed files with 27 additions and 0 deletions

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@ -81,6 +81,10 @@ The boards in this section are not real mainboards, but emulators.
- [MS-7707](msi/ms7707/ms7707.md)
## Roda
- [RK9 Flash Header](roda/rk9/flash_header.md)
## SiFive
- [SiFive HiFive Unleashed](sifive/hifive-unleashed.md)

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@ -0,0 +1,23 @@
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
+---+