状态寄存器
BISS_IF的每次的数据帧传输完成后，均可以在状态寄存器读取本次数据传输的情况，若触发下一次数据传输，状态寄存器自动清0。
通过寄存器配置，可以配置WDG和RXEND状态产生中断信号，也就是每次数据发生传输超时可以触发中断，传输完成可以触发中断。
如下状态寄存器列表中各状态位对应信息：
| 符号 | 说明 |
|---|---|
| RX1 | RECV1接收到数据 |
| RX2 | Additional data 2 has been received， 接收到附加信息2 |
| RX3 | Additional data 1 has been received， 接收到附加信息1 |
| F1 | Fault 1 data is an invalid value， 数据是无效值 |
| F2 | Fault 2 data is an invalid value， 数据是无效值 |
| CRC1 | CRC error for the data to be stored in the RECV1 is detected， RECV1接收到的数据存在CRC错误 |
| CRC2 | CRC error for additional data 1， 附加信息1存在CRC错误 |
| CRC3 | CRC error for additional data 2， 附加信息2存在CRC错误 |
| MRSADR | MRS code/address error is detected， MRS代码或地址错误 |
| BUSY | Either one of the BUSY bits of additional data 1 and additional data 2 is 1， 附加信息1或2存在BUSY = 1 |
| RM | Either one of the RM bits of additional data 1 or additional data 2 is 1， 附加信息1或2存在RM = 1 |
| WRN | Either one of the WRN bits of additional data 1 or additional data 2 is 1， 附加信息1或2存在WRN = 1 |
| WDG | An error is detected by the watchdog timer， 看门狗超时异常 |
| RXEND | Reception is completed， 接收完成 |
| MBERR | Mode bit value error is detected， Mode比特错误 |