MicroSD
From HwB
Small version of Secure Digital cards. Used to be called T-Flash and TransFlash. Developed by SanDisk.
Contents |
Physical size
11 mm x 15 mm x 1 mm. 0.40 grams.
Pinout
SD Mode
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | DAT2 |  PP) |
Data Line 2 |
| 2 | CD/DAT3 | PP) |
Card Detect/Data Line 3 |
| 3 | CMD | PP) |
Command Line |
| 4 | Vdd |  |
Voltage Supply [2.7v or 3.6v] |
| 5 | Clock | |
Clock |
| 6 | Vss2 |  |
Ground |
| 7 | DAT0 | PP) |
Data Line 0 |
| 8 | DAT1 | PP) |
Data Line 1 |
Note: Direction is memory card relative to host
PP) Output is Push-pull.
SPI Mode
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | NC | not connected | |
| 2 | /CS | |
Chip Select/Slave Select (SS) |
| 3 | DI | |
Master Out/Slave In (MOSI) |
| 4 | VDD | |
Supply voltage |
| 5 | CLK | |
Clock (SCK) |
| 6 | VSS | |
Supply voltage ground |
| 7 | DO |  PP) |
Master In/Slave Out (MISO) |
| 8 | RSV | Reserved |
Note: Direction is memory card relative to host
PP) Output is Push-pull.