# RK1808 Release Note
## rk1808_bl31_v1.15.elf
| Date | File | Build commit | Severity |
| ---------- | --------------------- | ------------ | -------- |
| 2024-01-17 | rk1808_bl31_v1.15.elf | 56fe57e2a | moderate |
### New
1. Add support for DDR extension temperature, it is necessary to use the ddrbin file with extension temperature enabled.
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## rk1808_ddr_933MHz_v1.06.bin
| Date | File | Build commit | Severity |
| ---------- | --------------------------- | ------------ | -------- |
| 2024-01-17 | rk1808_ddr_933MHz_v1.06.bin | 4d116dc75c | moderate |
### New
1. Add support for DDR extension temperature which should use ddrbin_tool configuration "ext_temp_ref" to enable.
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## rk1808_bl32_v2.03.bin
| Date | File | Build commit | Severity |
| ---------- | :-------------------- | ------------ | --------- |
| 2023-08-28 | rk1808_bl32_v2.03.bin | b5340fd65 | important |
### New
1. Support pstore for optee log.
2. Enable dynamic SHM.
3. Support check ta encryption key is written.
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## rk1808_bl32_v2.02.bin
| Date | File | Build commit | Severity |
| ---------- | :-------------------- | ------------ | --------- |
| 2022-09-16 | rk1808_bl32_v2.02.bin | d84087907 | important |
### Fixed
| Index | Severity | Update | Issue description | Issue source |
| ----- | --------- | ------------------------------------------------------------ | ------------------------------------------------------------ | ------------ |
| 1 | important | Solve the problem that OPTEE is stuck during startup when printing is closed | User use /rkbin/tools/ddrbin_tool to close printing , then rk_atags will notify OPTEE to disable printing, When OPTEE starts, it will be stuck and unable to enter U-Boot | - |
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