According to Table 21-1 (SSP Pin Matrix) of the i.MX23 Reference Manual,
SSP_DATA3 is Slave Select 0 - it is used for boot. Please refer to i.MX23 EVK scheme,
where SSP1_DATA3 (SPI1_SS0) is applied.
According to Table 21-1 (SSP Pin Matrix) of the i.MX23 Reference Manual,
SSP_DATA3 is Slave Select 0 - it is used for boot. Please refer to i.MX23 EVK scheme,
where SSP1_DATA3 (SPI1_SS0) is applied.