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TRF7960A寄存器操作问题

Other Parts Discussed in Thread: TRF7960A

您好!

       我用STM8S208的硬件SPI和TRF7960A通讯,目前发现TRF7960A在5V 供电时,上电读取寄存器0x00,返回0x01是正确的,此时测量VDD_RF电压也是5V,但是在向寄存器0x00写入0X21,再读取寄存器0X00返回0x00,再测量VDD_RF电压变为3.5V。同时发现寄存器的值不能连续多次读取,第一次读取可以返回正确的值,但是后面的都是0xff了,麻烦知道原因的人帮忙解释下,谢谢!