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Diffstat (limited to 'sdcard/sd_mode/rcar-h2/README')
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1 files changed, 29 insertions, 0 deletions
diff --git a/sdcard/sd_mode/rcar-h2/README b/sdcard/sd_mode/rcar-h2/README new file mode 100644 index 0000000..7d2b16e --- /dev/null +++ b/sdcard/sd_mode/rcar-h2/README @@ -0,0 +1,29 @@ +------------------------------------------------------------------------------- +SD card / SD mode / R-Car H2 +------------------------------------------------------------------------------- + +This is a set of example captures of SD cards in "SD mode" (not SPI mode). + +The cards were used in a board called "Lager" powered by a Renesas R-Car H2 +(r8a7790) SoC. The SD card was a Samsung PRO 32GB microSDHC. + +Details: +http://elinux.org/R-Car/Boards/Lager +http://www.samsung.com/de/consumer/memory-storage/memory-storage/memory-cards/MB-MG32EA/EU/ + + +Logic analyzer setup +-------------------- + +The logic analyzer used was a OpenBench Logic Sniffer at 50MHz. + +For easier measurement, the Linux driver for the SD controller was forced +at 1 bit bus width and 25MHz max frequency. + +Obtained via PulseView, so no command-line. + + Probe SD card + ------------------- + 0 CMD + 1 CLK + |