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<section begin="History" />{| style="border-collapse:collapse; "! colspan="4" style="width:100%; text-align:left" ; border-bottom:solid 2px #ededed" |History|- ! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Issue Date! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Notes|-| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |{{InfoBoxTopoldid|5205|2016/07/21}}| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |New documentation layout|-| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |{{AppliesToAXELULiteoldid|8793|2019/08/19}}{{InfoBoxBottom}| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |Add information for power consumption figures|-! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |2020/10/15! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |Minor changes|}<section end="History" />__FORCETOC__<section begin="Body" /> ==IntroductionPower Supply Unit (PSU) and recommended power-up sequence ==AXELULite AXEL ULite system-on-module (SOM for short) is powered by carrier board via <code>VIN_SOM</code> rail.
About voltage range, three supported configurations are available. These configurations are indicated by the value of the '''f''' field of the ordering code. The generic ordering code is in the form:
!Nominal voltage
|-
| UART1-UART5 <br> CSI <br> LCD <br> NAND ||3V3_IO||155||3.3|-| <br>SD1<br>JTAG <br> GPIO1 <br> ENET1-ENET2 || NVCC_ENET 3V3_IO||141155||3.3V (default)<br>1.8V|-| SD1 || NVCC_SD || NA || 3.3V (default)<br>1.8V
|-
| SNVS_TAMPER[9:0]||VDD_SNVS_IN||143||3.0
*the same voltage rail is used to power AXEULite SOM and 3.3V carrier board circuitry.
Since powering is strictly related to reset signals, reading of [[Reset_scheme_Reset scheme (AXELULiteAXEL ULite)|this page]] is highly recommended. Fot information about power consumption, please refer to [[Power consumption (AXEL ULite)|this article]]. {{ImportantMessage|text=For more information about this options, please contact DAVE's sales team at [mailto:sales@dave.eu sales@dave.eu]}}
=== Power Supply Unit (PSU) and recommended power-up sequence ===Implementing correct power-up sequence for i.MX6UL processors is not a trivial task because several power rails are involved. AXELULite AXEL ULite SOM simplifies this task by embedding all the needed circuitry. The following picture shows a simplified block diagram of PSU/voltage monitoring circuitry:
* synchronizes the powering up of carrier board in order to prevent back power.
==== Power-up sequencesignals====
The typical power-up sequence is the following:
# (optional) PMIC_LICELL is powered by a Lithium coin cell battery
#*iMX6UL SNVS domain is powered ([[Pinout_(AXEL_ULite)#VDD_SNVS_IN|VDD_SNVS_IN]])
# VIN_SOM main power supply rail is powered
#*iMX6UL SNVS domain is powered ([[Pinout_(AXEL_ULite)#VDD_SNVS_IN|VDD_SNVS_IN]])
# CPU_PORn (active-low) is driven low
# PMIC_PWRON signal is pulled-up (unless carrier board circuitry keeps this signal low for any reason)
For further details, please refer to <ref name="PF3000">Freescale Semiconductor, ''PF3000 Advance Information - Power Management Integrated Circuit (PMIC) for i.MX 7 & i.MX 6SL/SX/UL''</ref>, <ref name="IMX6ULIEC">''Freescale Semiconductor, Data Sheet: Technical Data - i.MX 6UltraLite Applications Processors for Industrial Products''</ref>.
===References===
{{reflist}}
<section end="Body" />
