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TMS570LS3137在-30度冷启动

Other Parts Discussed in Thread: TMS570LS3137

TMS570LS3137在-30度冷启动时SPI3的PCDIN寄存器的CS[1]位为0,在高温和常温时为1。冷启动后升温到20度以上后改为恢复为1。在高温或常温加电,后降温至-30度工作不断电,该为值为1。SPI3模块没有使用,上电后配置寄存器按默认状态初始化,SPI3对应外部引脚为悬空。程序内只用了SPI2用于普通的SPI全双工通信。

请教为什们冷启动会为0,谢谢!