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IGEP
TM
SMARC iMX6
Hardware Reference Manual
ISEE 2007 S.L. All rights reserved, IGEP is a registered trademark from ISEE 2007 S.L. The following is provided for informational purposes only.
NIF:ESB64377005 Document:
MAN-IGEP0046-001
/ Revision:
1.3
/ Date:
23/06/2016
15
4.3
CONTROL SIGNALS
There are different pins used as general control signals. They affect the Boot Mode, the management of the
power supply and resets.
Boot Mode
The Boot Mode can be fixed by user acting over the pins P125, P124 and P123. When the module is powered
on, it reads these pins and it boots as it is specified in next table.
BOOT_SEL2# (P125)
BOOT_SEL2# (P124)
BOOT_SEL2# (P123)
Boot source
GND
GND
GND
Carrier SATA
GND
GND
Float
Carrier SD Card
GND
Float
GND
Carrier eMMC Flash
GND
Float
Float
Carrier SPI
Float
GND
GND
Module device
Float
GND
Float
Remote boot
Float
Float
GND
Module eMMC Fash
Float
Float
Float
Module SPI
Table 7 Boot Mode
It’s recommended to use jumper headers to control these boot pins as it is showed in next figure (page 29 of
SMARC Design Guide).
Figure 8 Boot Mode: jumpers selectors