[参考译文] TRF7970A：读取寄存器-对要发送的值感到困惑

https://e2e.ti.com/support/wireless-connectivity/other-wireless-group/other-wireless/f/other-wireless-technologies-forum/1160889/trf7970a-reading-registers---confused-on-what-values-to-send

大家好、

我正在使用 SPI 与我的 pic 和 TRF7970A 通信、我可以通过执行以下操作成功读取注册表值、但不确定我为什么需要这些准确值

    Local_8 = writeSPI2(0x83);	// why is it not 0x03
    Local_8 = writeSPI2(0x80);	
    delay_ms(1);    
    
    Local_8 = writeSPI2(0x40);	// why do I have to send 0x40 to get registry address 0x00
    Local_8 = writeSPI2(0x00);	 
    
    Local_8 = writeSPI2(0x41);	// why do I have to send 0x42 to get registry 0x01
    Local_8 = writeSPI2(0x00);	

    Local_8 = writeSPI2(0x42);	// why do I have to send 0x42 to get registry 0x02
    Local_8 = writeSPI2(0x00);	
    
    etc....... for all the other values in the reminaing registry

第一个问题  

• 为什么我需要发送0x83而不是0x03进行软件初始化？
• 为什么我需要在每个读取命令中添加0x40。 例如、要获取注册表1 (ISO 控制)、我需要发送0x41？
• 是否有一个文档详细说明了要发送哪些代码用于读取、写入块读取/写入等、

提前感谢  

JT