From 10490b98e2c8b7b0c6c275b6b809d48697f6ee2f Mon Sep 17 00:00:00 2001 From: Nico Huber Date: Thu, 21 Mar 2019 23:17:06 +0100 Subject: mb/roda/rk9: Document flash header Change-Id: I5bd131635340ffa0c6b8979fc8e263fc5f09fdc5 Signed-off-by: Nico Huber Reviewed-on: https://review.coreboot.org/c/coreboot/+/32025 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Rudolph --- Documentation/mainboard/roda/rk9/flash_header.md | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 Documentation/mainboard/roda/rk9/flash_header.md (limited to 'Documentation/mainboard/roda/rk9/flash_header.md') diff --git a/Documentation/mainboard/roda/rk9/flash_header.md b/Documentation/mainboard/roda/rk9/flash_header.md new file mode 100644 index 0000000000..c2978cbe68 --- /dev/null +++ b/Documentation/mainboard/roda/rk9/flash_header.md @@ -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 + +---+ -- cgit v1.2.3