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TMS320C6748: 16位并行BOOT NOR FLASH的连接

Part Number: TMS320C6748

你好

我们应用要求采用非AIS方式的并行nor flash启动,目前打算采用 MT28EW128ABA,8/16位兼容的并行nor flash。

spraat2f 中对启动方式说明首先是以8位模式启动,然后根据配置字重新配置到16位

“If ACCESS == 0x1, bootloader reconfigures EMIFA for 16-bit access before using specified boot METHOD to boot from NOR. The default configuration of the bootloader is for an 8-bit access.”

但是8位flash和16位flash的地址连接方式并不一样,spruh79c图18-8有说明:

同样的,nor flash端8位或16位模式接口也不一样:

我想了解当我采用16位并行nor flash的时候,应该如何连接EMIFA口与Nor Flash,保证EMIFA能正常boot,并且此后能工作在16位模式?

谢谢!

Hailong