projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| c4b1d633 WS |
1 | ------------------------------------------------------------------------------- |
| 2 | SD card / SD mode / R-Car H2 | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This is a set of example captures of SD cards in "SD mode" (not SPI mode). | |
| 6 | ||
| 7 | The cards were used in a board called "Lager" powered by a Renesas R-Car H2 | |
| 8 | (r8a7790) SoC. The SD card was a Samsung PRO 32GB microSDHC. | |
| 9 | ||
| 10 | Details: | |
| 11 | http://elinux.org/R-Car/Boards/Lager | |
| 12 | http://www.samsung.com/de/consumer/memory-storage/memory-storage/memory-cards/MB-MG32EA/EU/ | |
| 13 | ||
| 14 | ||
| 15 | Logic analyzer setup | |
| 16 | -------------------- | |
| 17 | ||
| 18 | The logic analyzer used was a OpenBench Logic Sniffer at 50MHz. | |
| 19 | ||
| 20 | For easier measurement, the Linux driver for the SD controller was forced | |
| 21 | at 1 bit bus width and 25MHz max frequency. | |
| 22 | ||
| 23 | Obtained via PulseView, so no command-line. | |
| 24 | ||
| 25 | Probe SD card | |
| 26 | ------------------- | |
| 27 | 0 CMD | |
| 28 | 1 CLK | |
| 29 |