Freescale Semiconductor
MCIMX53SMD Board Hardware User’s Guide, Rev. 0
37
011X
- Serial ROM (I2C/SPI) Boot
1XX0 - SD/MMC (eSD/eMMC) Boot
For each of the bootable source selections, the remaining BOOT_CFG pins have different meanings. The pins
are meant to choose initialization settings required for each specific boot source. The following paragraphs
will specify those choices based on bootable source:
HD (PATA/SATA)
BOOT_CFG1[3]
HD Type
0 – PATA
1 – SATA
Serial-ROM
BOOT_CFG1[3]
Serial ROM Select
0 – I2C
1 – SPI
BOOT_CFG2[5]
SPI Addressing
0 – 2-byte (16-bit)
1 – 3-byte (24-bit)
BOOT_CFG3[5:4]
Port Select
00 – I2C1/eCSPI1
01 – I2C2/eCSPI2
10 – I2C3/CSPI
11 – Reserved
BOOT_CFG3[3:2]
Chip Select (SPI Only) 00 – CS0
01 – CS1
10 – CS2
11 – CS3
