coreboot-libre-fam15h-rdimm/Documentation/mainboard/roda/rk9/flash_header.md

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
+---+