...
| PCBA Designator | Functionality | Part Number | Manufacturer | Operating Temperature | Datasheet |
|---|---|---|---|---|---|
| U1 | 5V SMPS | LMZ31506 | Texas Instruments | -40 to 85C | http://www.ti.com/lit/ds/symlink/lmz31506.pdf |
| U2_A, U2_B | 1500mA LDO | TPS74801 | Texas Instruments | -40 to 125C | http://www.ti.com/lit/ds/symlink/tps74801.pdf |
| U3_A, U3_B | 500mA LDO | TPS74701 | Texas Instruments | -40 to 125C | http://www.ti.com/lit/ds/symlink/tps74701.pdf |
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.
Quantum Efficiency
Clock Generation
| PicoZed Pin | Net Name | Functionality | Comment |
|---|---|---|---|
| JX2-8 | CLK_SRC | Input CLK | Defines the output rate |
JX1-17 | OUT_CLK_P | Output CLK | High speed LVDS output clock |
| JX1-49 | OUT_CLK_N | Output CLK | High speed LVDS output clock |
| JX1-47 | LVDS_CLK_P | Input CLK | High speed LVDS input clock |
| JX1-49 | LVDS_CLK_N | Input CLK | High speed LVDS input clock |
Control Pins
The following pins are connected to the Program System (PS) part of the FGPA and are used to control the sensor functionality.
...
FPGA Interface (PicoZed)
SD Card Interface
The payload supports microSD cards for up to 32GB of storage. Because SDIO is con
| PicoZed Pin | Net Name | Functionality | Comment |
|---|---|---|---|
| JX3-43 | PS_MIO_40 | Clock | |
| JX3-34 | PS_MIO_41 | Commands | |
| JX3-37 | PS_MIO_42 | Data0 | |
| JX3-36 | PS_MIO_43 | Data1 | |
| JX3-39 | PS_MIO_44 | Data2 | |
| JX3-48 | PS_MIO_45 | Data3 | |
| JX3-66 | PS_MIO_50 | CD |
USB-UART Connection
USB connection for debugging. It is connected to UART through a FTDI USB-UART bridge that provides USB driver firmware, meaning there's no need to install a driver and it can be read/written using a regular terminal with baud rates up to 3 million symbols per second. A TX and RX indicator is provided on the pcb for debug, to indicate if the camera is receiving or sending data over UART.
...
| PicoZed Pin | Net Name | Functionality | Comment |
|---|---|---|---|
| JX1-1 | JTAG_TCK | ||
| JX1-2 | JTAG_TMS | ||
| JX1-3 | JTAG_TDO | ||
| JX1-4 | JTAG_TDI | ||
| JX1-6 | CARRIER_RST |
LED Indicators
| Indicator | Label | Functionality |
|---|---|---|
| LED1 | Power | Indicates if the payload has power |
| LED2 | TX | Indicates if the payload is transmitting on debug |
| LED3 | RX | Indicates if the payload is receiving on debug |
| LED4 | FPGA | Indicates if the Program Logic (PL) is ready to go |
Board Outline and Material
Production Design Files
| Type | File | Kind | Comment | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Schematic |
| Missing watermark, not made pretty yet, duplicate components and some of the component values are wrong. | |||||||
| Bill-of-materials |
| Bill of materials with pricing information. | |||||||
| Gerber | ntnu-hsi-prototype-SlotHoles.TXT | NC Drill Top Solder Top Paste Top Overlay Top Signal Top Pad Bottom Pad Middle Signal Middle Signal Board Outline Gerber drill Bottom Solder Bottom Paste Bottom Overlay Bottom Signal | Gerber files sent to production, not that slots are in a separate drill file. | ||||||
| Altium Designer | Altium Designer 17 project files |
...