When the SPI function in the HT46RB70 is setup in the Master Mode, how is CSn controlled?
Answer When the SPI is setup in the Master mode, if the SIO CDEN configuration option is enabled, then when CSEN (bit 2 of the SBCR register) is setup as a 1, CSn is automatically controlled by the MCU. Here, if SBEN, which is bit 4 of the SBCR register is 1, CSn will output a LOW. When SBEN is 0, CSn will output a HIGH. When CSEN is setup to 0, or if SIO CSEN configuration option is disabled, then CSn is controlled manually.
