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DEMO_FX3_U3V_CAM01 EZ-USB™ FX3 camera kit guide
EZ-USB™ FX3 camera kit system design
3.2.3
Baseboard power supply
The baseboard consists of three regulators. Each power rail has corresponding test points on the board for
probing. Make sure no external voltages are applied at the test points as it may permanently damage the kit
functionality.
3.2.3.1
5 V to 3.3 V regulator (U1)
This is an LDO that provides a 3.3 V output at 1 A. TLE4284DVATMA1 from Infineon Technologies is used on this
board.
3.2.3.2
5 V to 1.2 V regulator (U6)
This is a buck regulator that provides 1.2 V for powering the FX3 core. It also provides power to the FPGA present
on camera add-on board. IR3883MTRPBF from Infineon Technologies is used on board.
3.2.3.3
5 V to 1.8 V / 3.3 V regulator (U8)
This is an LDO that provides a 1.8 V or 3.3 V output at 1 A. This regulator features a switch SW1 that changes the
output voltage based on the switch status.
Mode 1: SW1 = OFF → V
OUT
Mode 2: SW1 = ON → V
OUT
TLE4284DVATMA1 from Infineon Technologies is used on this board.
3.2.4
FX3 (U3)
This is a USB 3.1 Gen 1 SuperSpeed controller with a 32-bit ARM926EJ core CPU and 512 kB embedded SRAM. It
supports UVC, UAC, U3V, and USB vendor class protocols. With GPIF II of 8-, 16-, 24-, and 32-bit data bus at
100 MHz, FX3 supports slave FIFO and parallel camera interface features. It has dedicated interfaces for SPI Flash
and I
C. FX3 supports selectable clock input frequencies at 19.2, 26, 38.4, and 52 MHz. Additionally, a dedicated
2
19.2 MHz crystal input support is also available. It is a 121-ball, 10- × 10-mm, 0.8-mm pitch Pb-free ball grid array
(BGA).
3.2.5
SPI flash (U7)
The kit configuration is stored on the 32-Mbit SPI flash. After power ON, FX3 fetches the required details from the
configuration image, stores it in its RAM and starts executing from it.
3.2.6
Interface/GPIO connectors (J4, J5)
The baseboard has two 20-pin interfaces/GPIO female connectors. All the signals required for interfacing FX3
with external add-on modules are routed to the connectors. Pin 5 of J4 in the connector is removed (i.e., cut) to
polarise the connector to avoid connecting the add-on boards in incorrect orientation.
Note:
Do not connect any external voltage source to these pins as it may permanently damage the kit.
The pins are available only for probing purpose.
3.2.7
Crystal (Y1)
FX3 needs a 19.2-MHz crystal to generate the clock for its operation.
User Guide
= 1.8 V
= 3.3 V
9 of 28
002-36189 Rev.*B
2022-12-13
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