SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
Table 4-51 shows the boot parameter table for OSPI, QSPI, or SPI boot. Must be preceded with the common boot parameters described in Table 4-38.
Byte Offset | Size (bytes) | Name | Default Value | Description |
---|---|---|---|---|
256 | 1 | Port | 0 | Physical port number |
257 | 1 | Mode on | From Pins | If non-zero, the mode byte will be sent |
258 | 1 | Instruct Width | From Pins | Number of pins used to send instructions (1, 2, 4, 8) |
259 | 1 | Address Width | From Pins | Number of pins used to send address (1, 2, 4, 8) |
260 | 1 | Data Width | From Pins | Number of pins used to received data (1, 2, 4, 8) |
261 | 1 | Address Size | 24 | 24, and 32 bits are the valid address sizes |
262 | 1 | Mode | 0 | OSPI clock polarity and phase mode |
263 | 1 | CSEL | From Pins | Chip select number (0–3) |
264 | 1 | Read Cmd | From Pins | Command used to read read data |
265 | 1 | Mode byte | 0 | Value used for the mode byte (when active) |
266 | 1 | Dummy Cycles | From pins | Number of dummy cycles sent after the read command |
267 | 1 | clkRecovery | From pins | Clock recovery |
268 | 1 | dqsEnable | 0 | Enable DQS |
269 | 1 | Reserved | 0 | Reserved |
270 | 2 | Module Freq | 0 | The OSPI module frequency after PLL enable, in kHz. If 0, ROM code uses the value from the module clock tables. |
272 | 4 | Bus Frequency | From pins | The OSPI bus frequency, in kHz |
276 | 4 | Delay | 0x08080808 or 0x01010101 | The chip select read delays. Default value is based on the read command |
280 | 4 | Tap Delay | 0xFFFFFFFF | The read tap selection. If 0xFFFFFFFF, the ROM code will scan the taps to find the best delay. The result will then overwrite the value in this table. |
284 | 4 | Internal Clk | From pins | 0 = external (dqs) 1 = internal |
288 | 4 | notDAC | From pins | When 0, DAC mode is used |
292 | 4 | Read Index | 0 | Index to the active read address (0-1) |
296 | 4 | Read Addr 0 | 0x000000 | The initial flash read address |
300 | 4 | Read Addr 1 | 0x400000 (0x4000 SPI) | Backup read address |
304 | 4 | Reserved | 0 | Reserved |
308 | 4 | Reserved | 0 | Reserved |