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
25
4.10
UART: UNIVERSAL ASYNCHRONOUS RECEIVER-TRANSMITTER
There are three defined UART devices in the module in order to control serial devices or debug via serial. They
are available in the SMARC-314 in three blocks of pins.
The IGEP
TM
SMARC iMX6 uses a 1V8 voltage levels for UART buses. In some cases, voltage translators should
be necessary to adapt voltage levels between ICs.
The IGEP
TM
SMARC iMX6 uses UART2 as a Kernel Debug Peripheral. This UART is an inexpensive method to
detect and repair system issues. It’s advisable to use another UART instead of UART2 to preserve this
functionality. In the next figure is shown how to connect the UART SMARC pins (page 39 of SMARC Design
Guide V_IO=1V8).
Figure 18 UART SMARC connections
