1# RK3566 Release Note 2 3## rk3566_ddr_{1056...324}MHz_v1.15.bin 4 5| Date | File | Build commit | Severity | 6| ---------- | ------------------------------------ | ------------ | --------- | 7| 2022-11-08 | rk3566_ddr_{1056...324}MHz_v1.15.bin | ec2fae0c96 | important | 8 9### Fixed 10 11| Index | Severity | Update | Issue description | Issue source | 12| ----- | --------- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------ | 13| 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 | - | 14 15------ 16 17## rk3566_ddr_{1056...324}MHz_v1.14.bin 18 19| Date | File | Build commit | Severity | 20| ---------- | :----------------------------------- | ------------ | --------- | 21| 2022-08-27 | rk3566_ddr_{1056...324}MHz_v1.14.bin | b1f29a2a6f | important | 22 23### Fixed 24 25| Index | Severity | Update | Issue description | Issue source | 26| ----- | --------- | --------------------------------------------------------- | ------------------------------------------------------------ | ------------ | 27| 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. | - | 28| 2 | important | fix ddr4 528M stability problem | some DRAM DLL can't lock at 528M，DLL should be bypass for 528M | - | 29 30------ 31