hello,I have a problem about the stm32f103rb. According to the RM0008 reference manual downloaded in your website, I find the description of slave select(NSS) pin management. So the NSS signal can be driven high if the SPI is disabled as described in the manual. However,when the SPI is disabled, the NSS signal is still low not high. Could you help me and whether the description of slave select(NSS) pin management in the reference is right or not? I'm looking forward to your reply. Thank you!