Features
Table 1. eMMC feature table
Table 2. eMMC Bus Speed Modes
| Mode | Data Rate | I/O Valtage (V) | Bus Width | Frequency (MHz) | Max Data Transfer (MB/s) |
|---|---|---|---|---|---|
| Legacy | Single | 3, 1.8, 1.2 | 1, 4, 8 | [0, 26] | 26 |
| High Speed SDR | Single | 3, 1.8, 1.2 | 1, 4, 8 | [0, 52] | 52 |
| High Speed DDR | Dual | 3, 1.8, 1.2 | 4, 8 | [0, 52] | 104 |
| HS200 | Single | 1.8, 1.2 | 4, 8 | [0, 200] | 200 |
| HS400 | Dual | 1.8, 1.2 | 8 | [0, 200] | 400 |
eMMC Addressing Mode
eMMC Spec defines two addressing modes:
- Byte addressing
- Sector addressing
To determine the addressing mode, the host should should read bit [30:29] in the OCR register.