iMX RT1176 uCOM Developer’s Kit - User’s Guide
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Copyright 2021 © Embedded Artists AB
2.7
OTP Fuse Programming
The i.MX RT1176 MCU has on-chip OTP fuses that can be programmed, see NXP documents
IMXRT1170RM, i.MX RT1170 Processor Reference Manual
for details. Once programmed, there is no
possibility to reprogram them.
iMX RT1170 uCOM Boards
are delivered with BT_FUSE_SEL = 1. No other OTP fuse has been
programmed. It is completely up to the COM board user to decide if OTP fuses shall be programmed
and in that case, which ones.
Just programming BT_FUSE_SEL = 1 will set the boot device to the on-board QSPI flash. It is possible
to specify another boot mode by programming the BOOT_CFG1[7:0] and BOOT_CFG2[3:0] fuses.
Note that Embedded Artists does not replace iMX RT1176 uCOM Boards because of wrong OTP
programming. It’s the user’s responsibility to be absolutely certain before OTP programming
and not to program the fuses by accident.
2.8
CE Assessment
The
iMX RT1176 uCOM Developers Kit
(consisting of the
iMX RT1176 uCOM Board
and
uCOM
Carrier Board
) is CE marked. See separate
CE Declaration of Conformity
document.
The
iMX RT1176 uCOM Developers Kit
is a class A product. In a domestic environment this product
may cause radio interference in which case the user may be required to take adequate measures.
EMC emission test has been performed on the
iMX RT1176 uCOM Developers Kit
. Standard
interfaces like Ethernet, USB, serial have been in use. General expansion connectors where internal
signals are made available (for example processor pins) have been left unconnected. Connecting other
devices to the product via the general expansion connectors may alter EMC emission. It is the user’s
responsibility to make sure EMC emission limits are not exceeded when connecting other devices to
the general expansion connectors of the
iMX RT1176 uCOM Developers Kit
.
Due to the nature of the
iMX RT1176 uCOM Developers Kit
– an evaluation board not for integration
into an end-product – fast transient immunity tests and conducted radio-frequency immunity tests have
not been executed. Externally connected cables are assumed to be less than 3 meters. The general
expansion connectors where internal signals are made available do not have any other ESD protection
than from the chip themselves. Observe ESD precaution.
Note that the
iMX RT1176 uCOM
board is classified as a component and is hence not CE marked
separately. It can perform different functions in different integrations and it does not have a direct
function. It is therefore not in the scope of the CE Directive. An end product, where a
uCOM Board
is
integration into, is however very likely to need CE marking.