1、手册上关于QSPI的描述,看不太懂,能帮我翻译一下吗?下面几条。
Support for 3-, 4-or 6-pin SPI interface
3-pin mode uses spi_dout as inout/spi_din not used
4-pin mode for dual read uses spi_dout as in/spi_din as in
6-pin mode uses spi_dout as in/spi_din as in/spi_qdin0 as in/spi_qdin1 as in
2、从figure27-1来看,QSPI_D0可作为输入输出口用,QSPI_D[1:3]只能作为输入口用,我的理解有没有错?也就是不能随意配置成我们常说的双线SPI或者四线SPI,还有,D2、D3口也不能配置成写保护或者HOLD功能?
Nancy Wang:
1.是的,请查看TRM Table 27-4. QSPI Pin ListI/O部分的说明。
2.是的