yabo国际娱乐对话框半导体客户支持- SPI_EN PIN https://support.dialog-semiconductor.com/resource-keywords/spien-pin en SPI_EN PIN是干什么用的? https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-hardware-device-reference-designs-dialog--8

DA14580的SPI信号当中有一个SPI_EN PIN,请问是干什么用的?在寄存器SPI_CTRL_REG (0x50001200)中是这么描述 bit15 SPI_EN_CTRL位的作用:
0 = SPI_EN pin disabled in slave mode. Pin SPI_EN is don'tcare.
1 = SPI_EN pin enabled in slave mode
1.这是否意味着只有当SPI工作在slave模式下且SPI_EN_CTRL=1时才用到SPI_EN PIN,此引脚低电平使能SPI CLK ?
2.在SPI主模式下不存在SPI_EN PIN ?
3.当SPI工作在slave模式下且SPI_EN_CTRL=0时不需要提供SPI_EN PIN,即使提供了也不起作用,那么此时SPI CLK是使能可用还是被禁止了?这种情况下SPI还能工作通信吗?
4. booting from external device时,也即从外部器件引导程序时,dialog开发板上的DA14580 SPI是配置成master mode还是slave mode ? 也即P0_5 pin 是MISO还是MOSI ? 怎么没见配置SPI_EN pin ? 参考文档AN-B-001 - Booting from serial interfaces v2.0.pdf

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Thu, 14 Dec 2017 15:32:54 +0000 tanyong1126 126156 at https://support.dialog-semiconductor.com https://support.dialog-semiconductor.com/forums/post/dialog-smartbond-bluetooth-low-energy-%E2%80%93-hardware-device-reference-designs-dialog--8#comments