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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT91SAM9G10-CU датащи(PDF) 78 Page - ATMEL Corporation |
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AT91SAM9G10-CU датащи(HTML) 78 Page - ATMEL Corporation |
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78 / 730 page  78 6462A–ATARM–03-Jun-09 AT91SAM9G10 Figure 13-6. Serial Flash Download 13.6 DataFlash Boot Sequence The Dataflash boot looks for a valid application in the SPI DataFlash memory. SPI0 is configured in master mode to generate a SPCK at 8MHz. Serial Flash shall be con- nected to NPCS0. The DataFlash boot reads the dataflash flash status register (Instruction code 0xD7). The data flash is considered as ready if bit 7 of the returned status register is set. If no dataflash is connected or if it does not answer, DataFlash boots exits after a 1000 attempts. End Read the first 8 instructions (0x0b). Decode the sixth ARM vector Yes Read the SerialFlash into the internal SRAM. (code size to read in vector 6) Restore the reset value for the peripherals. Set the PC to 0 and perform the REMAP to jump to the downloaded application Send status command (0x05) 8 vectors (except vector 6) are LDR or Branch instruction Yes Start Is status OK ? Jump to next boot solution No No |
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