imx23 spi flash boot -- chip select

[amanian]

I am looking to boot imx23 from a SPI NOR flash connected to spi2 bus. Does any one know what chip select the rom bootloader will use while talking to spi2 flash. The IMX23RM manual seems to be silent on this issue.

[Yuri · Accepted solution]

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. 

[amanian]

Thank you for the info. So for both spi1 & spi2 boot mode the chip select is SSn0.

Right?

[Yuri]

Correct.