Difference between revisions of "AXEL ULite adapter"
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==Power consumption measurement circuit== | ==Power consumption measurement circuit== | ||
| − | + | Power measurement circuit is based on [[http://www.ti.com/product/INA226 Texas Instruments INA226]]. This device is accessible via I2C bus either by iMX6UL or by an external host connected to test points TP3 and TP4. | |
==I/O voltage sequencing and monitoring== | ==I/O voltage sequencing and monitoring== | ||
Revision as of 09:23, 15 July 2016
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Contents
Introduction[edit | edit source]
AXELULite adapter is a board that DAVE Embedded Systems has made available to make initial development on AXELULite-based systems easier.
The following image shows a simplified block diagram. TBD
The following sections illustrate in more detail what it integrates and how to use it.
In principle it can be used with any carrier board designed to host AXELULite SOM.
Installation[edit | edit source]
AXELULite adapter has to be interposed between the carrier board and AXELULite SOM as shown by the following picture.
TBD
Once hardware boards have been assembled, BOOT_MODE and BOOT_CFG signals have to be configured in order to select the desired boot options.
Boot configuration[edit | edit source]
As described here, GPIO ovverride mode is extremely helpful when it comes to select different boot configuration options. AXELULite adapter provides a bank of switches that allows to change both BOOT_MODE and LCD1_DATAx signals affecting boot configurations. When the switch is in ON position, "0" logic level is selected.
The following table lists all the switches in detail.
| Switch reference | iMX6UL signal name | Correspondent eFUSE |
|---|---|---|
| S4.1 | BOOT_MODE0 | n/a |
| S4.2 | BOOT_MODE1 | n/a |
| S1.8 | LCD1_DATA00 | BOOT_CFG1[0] |
| S1.7 | LCD1_DATA01 | BOOT_CFG1[1] |
| S1.6 | LCD1_DATA02 | BOOT_CFG1[2] |
| S1.5 | LCD1_DATA03 | BOOT_CFG1[3] |
| S1.4 | LCD1_DATA04 | BOOT_CFG1[4] |
| S1.3 | LCD1_DATA05 | BOOT_CFG1[5] |
| S1.2 | LCD1_DATA06 | BOOT_CFG1[6] |
| S1.1 | LCD1_DATA07 | BOOT_CFG1[7] |
| S2.8 | LCD1_DATA08 | BOOT_CFG2[0] |
| S2.7 | LCD1_DATA09 | BOOT_CFG2[1] |
| S2.6 | LCD1_DATA10 | BOOT_CFG2[2] |
| S2.5 | LCD1_DATA11 | BOOT_CFG2[3] |
| S2.4 | LCD1_DATA12 | BOOT_CFG2[4] |
| S2.3 | LCD1_DATA13 | BOOT_CFG2[5] |
| S2.2 | LCD1_DATA14 | BOOT_CFG2[6] |
| S2.1 | LCD1_DATA15 | BOOT_CFG2[7] |
| S3.8 | LCD1_DATA16 | BOOT_CFG4[0] |
| S3.7 | LCD1_DATA17 | BOOT_CFG4[1] |
| S3.6 | LCD1_DATA18 | BOOT_CFG4[2] |
| S3.5 | LCD1_DATA19 | BOOT_CFG4[3] |
| S3.4 | LCD1_DATA20 | BOOT_CFG4[4] |
| S3.3 | LCD1_DATA21 | BOOT_CFG4[5] |
| S3.2 | LCD1_DATA22 | BOOT_CFG4[6] |
| S3.1 | LCD1_DATA23 | BOOT_CFG4[7] |
Low-power RTC example[edit | edit source]
This article deals with power consumption of AXELULite SOM. Power consumption in SNVS mode may be relatively high if:
- iMX6UL RTC is the only part that actually needs to be powered
- SNVS domain is powered by a limited-capacity energy storage device, such as coin cell Lithium battery or supercap.
In this case it is suggested to consider the use of an external low-power RTC instead. AXELULite adapter integrates such an RTC (ST M41T83). Please note that, when the system is powered off, SNVS domain is not powered at all because rechargeable coin cell is connected to external RTC only.
Power consumption measurement circuit[edit | edit source]
Power measurement circuit is based on [Texas Instruments INA226]. This device is accessible via I2C bus either by iMX6UL or by an external host connected to test points TP3 and TP4.
I/O voltage sequencing and monitoring[edit | edit source]
Documentation[edit | edit source]
- Schematics: TBD
- BOM: TBD
- Layout: TBD
- CAD Drawings: TBD
