User's Manual l MBa8Xx UM 0100 l © 2020, TQ-Systems GmbH
Page 11
3.2
Boot Mode configuration
The Boot Mode of the i.MX 8X is set with signals BOOT_MODE[3:0], which can be set with the 4-fold DIP switch S1.
The MBa8Xx supports the following TQMa8Xx boot sources.
•
eMMC (on TQMa8Xx)
•
QSPI NOR flash (on TQMa8Xx)
•
SD card (on MBa8Xx)
•
Serial downloader via USB OTG
Table 9:
Boot Mode configuration
Boot-Mode
S1-1 (BM3)
S1-2 (BM2)
S1-3 (BM1)
S1-4 (BM0)
Remark
Pos.
Level
Pos.
Level
Pos.
Level
Pos.
Level
Boot from eFuses
OFF
0
OFF
0
OFF
0
OFF
0
–
Serial Downloader (USB OTG1)
OFF
0
OFF
0
OFF
0
ON
1
As of i.MX 8X stepping B0
eMMC (USDCH0)
OFF
0
OFF
0
ON
1
OFF
0
–
SD card (USDHC1)
OFF
0
OFF
0
ON
1
ON
1
–
Reserved
OFF
0
ON
1
OFF
0
OFF
0
–
Reserved
OFF
0
ON
1
OFF
0
ON
1
–
QSPI (QSPI0A/B)
OFF
0
ON
1
ON
1
OFF
0
3-byte read
QSPI (QSPI0A/B)
OFF
0
ON
1
ON
1
ON
1
Only for Hyperflash
Reserved
ON
1
X
X
X
X
X
X
–
Note: Boot from NAND
Booting from NAND is not supported on the MBa8Xx.
