# RK3566 Release Note

## rk3566_ddr_{1056...324}MHz_v1.15.bin

| Date       | File                                 | Build commit | Severity  |
| ---------- | ------------------------------------ | ------------ | --------- |
| 2022-11-08 | rk3566_ddr_{1056...324}MHz_v1.15.bin | ec2fae0c96   | important |

### Fixed

| Index | Severity  | Update                                                       | Issue description                                            | Issue source |
| ----- | --------- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------ |
| 1     | important | To solve the instability problem of some chips when DDR run in 324MHz. | When DDR run in 324MHz, the system would unstable, causing a crash and restart | -            |

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## rk3566_ddr_{1056...324}MHz_v1.14.bin

| Date       | File                                 | Build commit | Severity  |
| ---------- | :----------------------------------- | ------------ | --------- |
| 2022-08-27 | rk3566_ddr_{1056...324}MHz_v1.14.bin | b1f29a2a6f   | important |

### Fixed

| Index | Severity  | Update                                                    | Issue description                                            | Issue source |
| ----- | --------- | --------------------------------------------------------- | ------------------------------------------------------------ | ------------ |
| 1     | moderate  | fix Fix set of t_xs_x32, t_xs_abort_x32 and t_xs_fast_x32 | Fix set of t_xs_x32, t_xs_abort_x32 and t_xs_fast_x32.This bug may lead to some low density dram(128M) fail. | -         |
| 2     | important | fix ddr4 528M stability problem                           | some DRAM DLL can't lock at 528M，DLL should be bypass for 528M | -         |

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