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04aceb21 ZD |
1 | ------------------------------------------------------------------------------- |
2 | SD card / SD mode / i.MX6 | |
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 an eval board based on the Freescale i.MX6 Quad. | |
8 | ||
9 | - Working: Transcend 16GB micro SDHC | |
10 | - Failing: SanDisk 2GB class 2 SD card | |
11 | ||
12 | Details: | |
13 | http://wandboard.org/ | |
14 | http://boundarydevices.com/products/nitrogen6x-board-imx6-arm-cortex-a9-sbc/ | |
15 | ||
16 | ||
17 | Logic analyzer setup | |
18 | -------------------- | |
19 | ||
20 | The logic analyzer used was a Saleae Logic16 (at 40MHz): | |
21 | ||
22 | Probe SD card | |
23 | ------------------- | |
24 | 0 CLK | |
25 | 1 DAT0 | |
26 | 2 DAT1 | |
27 | 3 DAT2 | |
28 | 4 CMD | |
29 | 5 DAT3 | |
30 |