我买了一块 DLP-7970ABP，使用3.3V供电，通过 SPI 与 MCU 通信，目前我读到 0x0F 寄存器为 0x40，其他寄存器都是 0x00
1. 按照 TRF7970A 数据手册进行了初始化操作，如何判断初始化完成并正确？
2. 如何读取 15693 标签的 UID，需要操作哪些寄存器，时序有哪些要求？
3. 如何读取 15693 标签的区块，需要操作哪些寄存器，时序有哪些要求？
4. 如何写入 15693 标签的区块，需要操作哪些寄存器，时序有哪些要求？
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我已经使用公司邮箱注册了账号，请问这个怎么解决，谢谢
