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5509A SPI-24BIT FLASH bootloader咨询

Other Parts Discussed in Thread: TMS320VC5509A

我做了一块板子,用的TMS320VC5509A,外接了一款AT25F1024 SPI-24BIT的FLASH。现在我写了2份代码,第一份代码BIN文件只有2KB,让板子上LED灯闪烁,第二段代码BIN文件8KB。把第一份代码的BIN文件烧写到FLASH里面,然后重启可以正确BOOT,但是把8KB的那段代码烧写到FLASH里面后,断电重启却不能正常BOOT。

请问这是什么原因造成的?