| LCD | 90% | Only one type of lcd implemented. No inverse and other fancy stuff. |
| Backlight | 100% | PWM frequency is quite low ~500Hz but my backlight driver circuit can't cope with higher freq reliably. |
| Buttons | 100% | Hardware keys for generic/reference design. |
| I2C? | 100% | One can write and readback registers of the internal codec. |
| SD | 90% | Basicaly works. DMA handling is suboptimal. Needs more testing. |
| NAND | 10% | Low level driver part is reverse engineered. The work on reverse engineer FTL scheme is started. |
| PCM | 80% | PCM driver implemented but playback is choppy on some players. |
| Codec | 80% | Driver for internal Dolphin codec implemented but not much tested. No support for anything else than playback through i2s yet. |
| Recording | 0% | Not implemented. |
| ADC | 50% | Implemented but not tested nor calibrated. |
| RTC | 0% | Not present in my device. From various documents it seems that HYM8563 (PCF8563 clone) is widely used. Some members of the rk27xx family have internal RTC. |
| FM | 50% | RDA5807P? can work in TEA5767 compatibility mode. Rockbox has mature driver for that. |
| USB | 5% 90% | The USB core has some weird scheme driver is not yet merged see of supporting control packets. Some requests seems to be handled purely in hardware which doesn't quite fit rockbox usbstack concept. patch on gerrit. There are still some minor issues to be solved and more testing is needed |
