ADLINK Technology Inc.
LEC-iMX8M User’s Guide
Page 46
copyright © 2021 ADLINK Technology Inc.
4.4.7
Boot Select
Name
Pin # Description
I/O
Type
I/O
Level
Power
Domain
PU / PD
Comments
BOOT_SEL0#
BOOT_SEL1#
BOOT_SEL2#
P123
P124
P125
Input straps determine the
Module boot
I OD
CMOS
1.8Vsb
Standby PU 4.7K
Driven by OD on Carrier.
Pulled up on module.
Only booting from EMMc and SDcard is supported
FORCE_RECOV# S155
I OD
CMOS
1.8Vsb
Standby PU 10K
Driven by OD on Carrier.
Pulled up on module.
Low on this pin allows non-protected segments of Module boot
device to be rewritten / restored from an external USB Host on
Module USB0. The Module USB0 operates in Client Mode when in
the Force Recovery function is invoked. Pulled high on the Module.
For SOCs that do not implement a USB based Force Recovery
functions, then a low on the Module FORCE_RECOV# pin may invoke
the SOC native Force Recovery mode – such as over a Serial Port.
For x86 systems this signal may be used to load BIOS defaults.
Pulled up on Module. Driven by OD part on Carrier.
