1# RK3566 Release Note 2 3## rk3566_ddr_{1056...324}MHz_v1.16.bin 4 5| Date | File | Build commit | Severity | 6| ---------- | ------------------------------------ | ------------ | --------- | 7| 2022-11-16 | rk3566_ddr_{1056...324}MHz_v1.16.bin | 6f71c736ce | important | 8 9### New 10 111. RK3568J/RK3568M use 1/2tREFI except LPDDR4/LPDDR4x. LPDDR4/LPDDR4x use derate mode. 122. TREFI, pageclose configurable by ddrbin tool. 133. Improve DDR4 performance. 14 15### Fixed 16 17| Index | Severity | Update | Issue description | Issue source | 18| ----- | --------- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------ | 19| 1 | important | To solve the instability problem of some ddr4 when DDR run in 528MHz. | When DDR4 run in 528MHz, the system would unstable, causing a crash and restart | - | 20| 2 | important | To solve 4GB ECC board Init fail bug | 4GB DDR4 board may crash in ddrbin | | 21 22------ 23 24## rk3566_ddr_{1056...324}MHz_v1.15.bin 25 26| Date | File | Build commit | Severity | 27| ---------- | ------------------------------------ | ------------ | --------- | 28| 2022-11-08 | rk3566_ddr_{1056...324}MHz_v1.15.bin | ec2fae0c96 | important | 29 30### Fixed 31 32| Index | Severity | Update | Issue description | Issue source | 33| ----- | --------- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------ | 34| 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 | - | 35 36------ 37 38## rk3566_ddr_{1056...324}MHz_v1.14.bin 39 40| Date | File | Build commit | Severity | 41| ---------- | :----------------------------------- | ------------ | --------- | 42| 2022-08-27 | rk3566_ddr_{1056...324}MHz_v1.14.bin | b1f29a2a6f | important | 43 44### Fixed 45 46| Index | Severity | Update | Issue description | Issue source | 47| ----- | --------- | --------------------------------------------------------- | ------------------------------------------------------------ | ------------ | 48| 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. | - | 49| 2 | important | fix ddr4 528M stability problem | some DRAM DLL can't lock at 528M，DLL should be bypass for 528M | - | 50 51------ 52