ADLINK Technology I-Pi SMARC User Manual page 38

I-Pi-SMARC User's Guide
5.16.1 Boot Select
Name Pin # Description
BOOT_SEL0# P123 Input straps determine the
BOOT_SEL1# P124 Module boot
BOOT_SEL2# P125
FORCE_RECOV# S155
Boot select switch
1 2 3 4 BOOT
0 1 1 0 SD card
0 0 1 0 SPI
0 1 0 0 Remote Gbe
1 0 0 0 eMMC (SoM)
0 0 0 1 Force Recovery
Note: Boot selector switch is located between the SoM and LAN ports.
Page 31
I/O I/O Power PU / PD
Type Level Domain
I OD 1.8Vsb Standby PU 4.7K
CMOS
I OD 1.8Vsb Standby PU 10K
CMOS
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Comments
Driven by OD on Carrier.
Pulled up on module.
Only booting from EMMc and SDcard is supported
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.
SGET SMARC Rev 2.1