| ``` |
| |
| #################### |
| # This file document the feature addition and status |
| |
| - 28th Aug 2022 - Dinesh A |
| A. Create 10 system strap pick following pads and generate pad direction control and master reset |
| sflash_sck, sflash_ss0,sflash_ss1,sflash_ss2,sflash_ss3, |
| sflash_io0,sflash_io1,sflash_io2,sflash_io3,dbg_clk_mon |
| B. uart master config control thrugh strap and remove dependency with caravel la_data_in |
| - baud rate control based on strap |
| C. Enable default reset enable for wishbone, qspi slave on power up (with delayed reset after strap loading) |
| D. Give option for Auto riscv core[0] removal based on strap |
| E. Default system clock selection based on strap |
| - wb clock or xtal pin |
| F. wbs and riscv, usb clock selection based on strap |
| G. strap to control the boot up configuration qspi-flash/sram |
| I. Riscv cache on/bypass through strap |
| J. Riscv SRAM edge selection through strap |
| K. Add Strap sticky bit for software based reboot |
| M. Created Master Reset control block to manage the boot sequence |
| A. Power On |
| - Power Up wait cycle minimum 50 ms (Add fast boot with strap) |
| - Strap latch control |
| - Pad Direction control |
| - core reset control |
| B,software reset request |
| - core reset control |
| |
| |
| - 2 Sept 2022 - Dinesh A |
| QSPI Design Changes |
| Test case: |
| Add QSPI test case to validate parallel Direct and Indirect access |
| Design Change: |
| A. Add previous power on strap from SRAM flash to take care of mode switching |
| 1. If the current & previous sram strap is Single, then bypass mode switching |
| 2. If the current=Single and Previous: Quad, then switch mode by command 0xFF (RSTDQI) |
| 3. If the current=Quad and Previous: Quad, then bypass mode switching |
| 4. If the current=Quad and Previous: Single, then switch mode by command 0x38 (ESQI) |
| Note: Power On Always assume previous strap = Single |
| ``` |
