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-rw-r--r--doc/board/sifive/unmatched.rst7
1 files changed, 5 insertions, 2 deletions
diff --git a/doc/board/sifive/unmatched.rst b/doc/board/sifive/unmatched.rst
index b52a1f6..24a8899 100644
--- a/doc/board/sifive/unmatched.rst
+++ b/doc/board/sifive/unmatched.rst
@@ -20,8 +20,11 @@ The support for following drivers are already enabled:
4. SiFive SPI Driver.
5. MMC SPI Driver for MMC/SD support.
-Booting from uSD using U-Boot SPL
----------------------------------
+Booting from micro SD card using U-Boot SPL
+-------------------------------------------
+
+Booting from an SD card requires that the boot mode selection DIP switches
+MSEL[3:0] are set to 1011.
Building
--------