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DEMO_FX3_U3V_CAM01 EZ-USB™ FX3 camera kit guide
EZ-USB™ FX3 camera kit system design
3.2.8
Reset switch (SW2)
The reset switch (SW2) is provided for debug purpose. The RC circuit provides a clean reset signal every time after
power up. The RC circuit formed by R1 and C72 gives a 10-ms pulse width because it assumes the worst 3.3 V
supply ramp up time and FX3 crystal POR reset time. On pressing SW2, FX3 starts rebooting based on the mode
selection switch SW3.
3.2.9
LEDs (LED1, LED2, LED3)
LED1 (power ON LED) is a GREEN color LED used for 3.3-V power supply indication
•
LED2 is a RED color LED to indicate fault on VBUS
•
LED3 is a BLUE color application-driven user LED connected to GPIO_4 of FX3
•
3.3
DEMO_FX3_U3V_CAM01 camera add-on board design details
3.3.1
Add-on board power supply
The camera add-on board consists of three regulators. Each power rail has corresponding test points on board
for probing. Make sure no external voltages are applied at the test points as it may permanently damage the kit
functionality.
3.3.1.1
3.3 V to 1.5 V regulator (U3)
This is an LDO that generates 1.5 V from 3.3 V coming from the baseboard. TLS205B0LDVXUMA1 from Infineon
Technologies is used on the board. It is rated to provide maximum current of 300 mA.
3.3.1.2
3.3 V to 2.5 V regulator (U1)
This is an LDO that generates 2.5 V from 3.3 V coming from the baseboard. TLS205B0LDVXUMA1 from Infineon
Technologies is used on the board. It is rated to provide maximum current of 300 mA.
3.3.1.3
3.3 V to 2.8 V regulator (U5)
This is an LDO that generates 2.8 V from 3.3 V coming from the baseboard. TLS205B0LDVXUMA1 from Infineon
Technologies is used on the board. It is rated to provide maximum current of 300 mA.
3.3.2
Crosslink FPGA (U2)
The camera add-on board uses CrossLink FPGA from Lattice Semiconductor. It is a programmable video
bridging device that supports a variety of protocols and interfaces for mobile image sensors and displays.
CrossLink supports video interfaces including MIPI DPI, MIPI DBI, CMOS camera and display interfaces,
OpenLDI, FPD-Link, FLATLINK, MIPI D-PHY, MIPI CSI-2, MIPI DSI, SLVS200, subLVDS, HiSPi, and more.
This kit uses the two MIPI CSI-2 interface ports of the CrossLink FPGA to communicate with the onboard camera
module and external camera module. The FPGA converts the received MIPI signals to a 16-bit parallel interface
thus allowing FX3 to communicate with the image sensors / camera module directly. This kit uses the 80-ball
ctfBGA package with 37 I/Os.
FX3
Figure 4
Crosslink FPGA interfaces
User Guide
16-bit Parallel Interface
MIPI CSI-2
Crosslink
FPGA
10 of 28
On board or OTS
Camera Module
002-36189 Rev.*B
2022-12-13
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