ADC12D1800评估板原理图C6、C7引脚与实物不符

在ADC12D1800评估板的原理图中ADC12D1XXX的C6为POREN,C7为WSS，可是芯片Datasheet 中 C6 为V_A,C7为NC，所以问一下大家，为什么？还有POREN和WSS是什么意思，有什么功能？谢谢！

评估板的原理图, 作为参考设计, 我觉得跟芯片 datasheet 的参考电路有点出入, 属于正常情况.

器件的引脚和功能没有错, 就不是问题哦

C6 – This pin was used for an internal test function for pre-production silicon, but it is not bonded in
production parts.
• C7 – This pin was used for an internal test function; it is not bonded in production parts and may be
connected to any potential or left floating.

Ball No.          ADC1xD1x00 Data Sheet Name             Reference Board Connection
C6                       VA                                                            POREN (from FPGA)
C7                        NC                                                           WSS (from FPGA)

For a few exceptions, Texas Instruments Reference Board does not follow the datasheet
recommendations for certain pin connections. These exceptions are listed in Table 2. Historically, the
exceptions exist because the Reference Board was developed before silicon development was finalized.

谢谢！