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The main SMPS can be controlled through the external connector and shut of power to the entire connector. The four power rails will turn on in sequence after the PicoZed power supplies have turned on using the "Power Good" functionality of the regulators. When everything is After all the regulators onboard the PicoZed board are up and running the microcontroller can check the power rails for the image sensor by reading pin xx.VCCIO_EN pin will go high and turn on the carrier card regulators. Each of the power rails have a designated test point located next to the regulator.
When the camera is powered the green LED labeled "Power" will light up.
List of important parts:
| PCBA Designator | Functionality | Part Number | Manufacturer | Specification | Datasheet | ||||
|---|---|---|---|---|---|---|---|---|---|
| U1 | 5V SMPS | LMZ31506 | Texas Instruments | ||||||
| U2 | 1500mA LDO | TPS74801 | Texas Instruments | ||||||
| U3 | 500mA LDO | TPS74701 | Texas Instruments |
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Image Sensor
The image sensor used is a CMOSIS CMV2000. The data is read out using low voltage differential singling (LVDS) and controlled using SPI. For maximum quantum efficiency (QA), the variation of the sensor processed on 12um epitaxial (E12) SI wafer is used. The thicker epic-layer increases the sensitivity to light above 600nm significantly. Due to the sensitivity due to high speed data transfer, the data lines are carefully impedance matched following the TIA/EIA 644 standard for LVDS signals.
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| Type | File | Kind | Comment | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Schematic |
| Missing watermark + not made pretty yet. | |||||||
| Gerber | ntnu-hsi-prototype-SlotHoles.TXT | Gerber files sent to production, not that slots are in a separate drill file. | |||||||
| Altium Designer | Altium Designer 17 project files |
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