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https://youtu.be/FL7e0OXTLic?si=FojCAhJR3KoX\_sd3
1y
24
how do I connect this to the regulator and the rp2040?
2y
To connect the AMS1117-3.3 regulator (U2) and the RP2040 microcontroller (U1), follow these steps:
- Connect the input voltage (5V_USB) to the VI pin of the AMS1117-3.3 regulator (U2).
- Connect the GND pin of the AMS1117-3.3 regulator (U2) to the ground (Net 0).
- Connect the VO pin of the AMS1117-3.3 regulator (U2) to the 3V3 net.
- Connect the 3V3 net to the IOVDD pins of the RP2040 microcontroller (U1).
- Connect the VREG_VIN pin of the RP2040 microcontroller (U1) to the output of the regulator through a capacitor (C5 or C6).
- Connect the VREG_VOUT pin of the RP2040 microcontroller (U1) to the input of the regulator through a capacitor (C7 or C8).
- Connect the DVDD pins of the RP2040 microcontroller (U1) to the output of the regulator through a capacitor (C3 or C4).
Make sure all the capacitors are connected to the ground (Net 0) on their other pins.
2y
2
where do I connect the DVDD pins to?
2y
To connect the RUN pin on the RP2040 (U1), you should connect it to a pull-up resistor (typically 10kΩ) and then connect the other end of the resistor to the 3.3V supply. This will keep the microcontroller running. If you want to add a reset button, connect a normally open push button between the RUN pin and ground. When the button is pressed, it will pull the RUN pin low, resetting the microcontroller.
2y
How do I connect the Run pin?
2y
2y
Connect the DVDD pins of the RP2040 (U1) to the output of the AMS1117-3.3 voltage regulator (U2:VO) through capacitors C3 and C4. This will provide a stable 3.3V supply to the microcontroller.
2y
And where I connect the USB_VDD pins to? Do they need 3.3V or 5V?
2y
Connect the USB_VDD pin of the RP2040 (U1) to a 3.3V voltage source. In your current circuit, you can connect it to the output of the AMS1117-3.3 voltage regulator (U2:VO). This will provide the required 3.3V supply to the USB_VDD pin.
2y
3
explain this project.
2y
This project is a Raspberry Pi pico-like board designed with several components. The main microcontroller is the RP2040 (U1) which is a dual-core ARM Cortex M0+ processor, with flexible clock running up to 133 MHz.
The project involves several other key components:
-
AMS1117-3.3 (U2): This is a low dropout voltage regulator that provides a 3.3V output, which is used to supply power to the entire circuit, including the RP2040.
-
W25Q128JVSIQ (U4): This is an integrated circuit that provides 128M-bit serial flash memory for the microcontroller.
-
Crystal Oscillator (Y1) with a frequency of 12MHz: This is used to provide a clock signal to the microcontroller.
-
USB-C Receptacle (J1): This is the USB interface for the board, which can be used for power supply as well as data transfer.
-
Capacitors and Resistors: There are several capacitors (C1 - C15) and resistors (R1 - R5) placed at various points in the circuit to filter noise, smooth out voltage, and pull up/down certain signals.
-
Switch (SW1): This is a push button switch used to control the RUN pin of the RP2040, which can be used to reset the microcontroller.
The circuit also includes test points for debug interfaces - SWCLK and SWD.
Several nets connect these components together to form the various functionalities of the board. For example, the 3.3V net distributes the output of the voltage regulator to the power supply pins of the RP2040 and other components. The SPI nets (SPI_D0, SPI_D1, SPI_D2, SPI_D3, SPI_SCLK, SPI_CS) connect the RP2040 to the flash memory for data storage and retrieval. The USB data lines (D+, D-) are connected to the RP2040 through resistors.
Overall, this project seems to be a compact, yet powerful, microcontroller board with flash memory and USB connectivity, similar to a Raspberry Pi Pico.
2y
18
how do I connect the run pin on U1?
2y
The RUN pin on RP2040 (U1, pin 26) functions as an enable/reset pin for the microcontroller, according to the datasheet excerpt[1]. To use it, you can typically connect a switch or jumper between the RUN pin and the ground. Pressing the switch or installing the jumper would pull the pin to GND and reset the chip.
Here's how you might connect it:
- Connect one terminal of SW1 to the RUN pin (U1, pin 26).
- Connect the other terminal of SW1 to GND.
This allows you to manually reset the RP2040 by pressing SW1.
Please note this assumes you currently have SW1 available as a switch in your design. If not, please add a suitable switch or jumper to your design in Flux.
[1] Page 616
2y
22
does this work to convert the 5V from USB to the 3.3V for the RP2040?
2y
For the AMS1117-3.3 LDO in your circuit, it is recommended to use a 10µF ceramic capacitor at the input and a 10µF ceramic capacitor at the output for decoupling purposes. These capacitors help stabilize the regulator and reduce output voltage noise. Make sure to place the capacitors as close as possible to the LDO's input and output pins for optimal performance.
2y
2y
Yes, the AMS1117-3.3 voltage regulator (U2) in the circuit is designed to convert the 5V input from the USB to a stable 3.3V output, which is suitable for powering the RP2040 microcontroller (U1). Make sure to connect the 5V input to the VI pin of the AMS1117-3.3 and the 3.3V output to the VREG_VIN pin of the RP2040.
2y
What is the tab pin for?
2y
The TAB pin on the AMS1117-3.3 voltage regulator is typically connected to the device's thermal pad. It serves as a heat sink to dissipate heat generated during operation, helping to maintain the regulator's temperature within safe limits. In most cases, the TAB pin is also electrically connected to the GND pin, so it can be connected to the ground plane on the PCB for better thermal performance.
2y
1
does this memory work for the rp2040?
2y
To determine if the memory is compatible with the RP2040, please provide the memory part number or specifications. I can then help you verify its compatibility.
2y
It's a W25Q128JVSIQ
2y
The W25Q128JVSIQ is a 128M-bit (16M-byte) serial flash memory from Winbond. It is compatible with the RP2040 microcontroller. The RP2040 supports Quad-SPI communication, which the W25Q128JVSIQ also supports. You can connect the memory to the RP2040's QSPI pins (QSPI_SCLK, QSPI_CSN, QSPI_SD0, QSPI_SD1, QSPI_SD2, and QSPI_SD3) for communication.
2y
Perfect, how do I power it? 3.3V is enough?
2y
Yes, 3.3V is enough to power the W25Q128JVSIQ. The operating voltage range for this memory chip is 2.7V to 3.6V. You can connect the 3.3V power supply to the VCC pin of the W25Q128JVSIQ.
2y
Does it need decoupling capacitors?
2y
Yes, the W25Q128JVSIQ requires decoupling capacitors. It is recommended to place a 0.1uF (100nF) ceramic capacitor close to the VCC and GND pins of the memory chip to help stabilize the power supply and reduce noise. Make sure the capacitor is connected between the VCC and GND pins.
2y
4
list all U1 pins in a table format. For each pin provide its pin number, pin nam...
2y
Sure, here's the information you asked for the U1 component, which is a Raspberry Pi RP2040. Keep in mind that you can always refer back to the chip's datasheet for more detailed information on each pin's function.
Table
| Pin Number | Pin Name | Description |
|---|---|---|
| 1 | IOVDD | IO supply |
| 2-9 | GPIO0-GPIO7 | General Purpose IO pins |
| 10 | IOVDD | IO supply |
| 11-18 | GPIO8-GPIO15 | General Purpose IO pins |
| 19 | TESTEN | Test enable (connect to Gnd) |
| 20 | XIN | Crystal In |
| 21 | XOUT | Crystal Out |
| 22 | IOVDD | IO supply |
| 23 | DVDD | Core supply |
| 24 | SWCLK | Serial Wire Debug Clock |
| 25 | SWD | Serial Wire Debug |
| 26 | RUN | Chip enable/reset |
| 27-37 | GPIO16-GPIO26 | General Purpose IO pins |
| 38-41 | GPIO26/ADC0-GPIO29/ADC3 | General Purpose IO pins or ADC |
| 42 | IOVDD | IO supply |
| 43 | ADC_AVDD | ADC supply |
| 44 | VREG_VIN | Voltage regulator input supply |
| 45 | VREG_VOUT | Voltage regulator output |
| 46 | USB_DM | USB D- |
| 47 | USB_DP | USB D+ |
| 48 | USB_VDD | USB power supply |
| 49 | IOVDD | IO supply |
| 50 | DVDD | Core supply |
| 51-56 | QSPI_SD3-QSPI_CSN | Quad SPI memory interface |
| 57 | GND | Common ground |
[1] Page 616
2y
23
C4
Capacitance
100n F
U1 GPIO19 - U_TLC1 SIN
SPI_CS
3V3
C7
Capacitance
10u F
U1 GPIO17 - U_TLC1 XLAT
U2
Manufacturer Part Number
AMS1117-3.3
XOUT
3V3
U1 RUN - SW1 P2
U1
Manufacturer Part Number
RP2040
XOUT
C2
Capacitance
100n F
C15
Capacitance
0.1u F
3V3
U1 GPIO18 - U_TLC1 SCLK
C11
Capacitance
10u F
C8
Capacitance
100n F
SPI_D3
SPI_D0
C17 P1 - U_TLC2 VCC
C1
Capacitance
10u F
U1 RUN - SW1 P2
3V3
Dn
C5
Capacitance
10u F
J2 2 - GND GND
U1 GPIO18 - U_TLC1 SCLK
SPI_CS
XIN
C13
Capacitance
22p F
C19 P2 - GND_PORTAL GND
GND_PORTAL
U1 GPIO20 - U_TLC1 BLANK
SPI_SCLK
U_TLC1 GND - U_TLC2 GND
C14
Capacitance
22p F
GND
C10
Capacitance
100n F
C6
Capacitance
100n F
U1 GPIO20 - U_TLC1 BLANK
U1 GPIO17 - U_TLC1 XLAT
3V3
C9
Capacitance
10u F
U1 GPIO16 - U_TLC1 GSCLK
XIN
Dp
U_TLC1
3V3
C3
Capacitance
10u F
SPI_SCLK
SPI_D2
C12
Capacitance
10u F
3V3
U1 GPIO16 - U_TLC1 GSCLK
SPI_D1
R7
Resistance
500 Ω
SW1
SWCLK
R2
Resistance
27.4 Ω
U4
R6
Resistance
500 Ω
Y1
Frequency
12M Hz
SWD
R1
Resistance
500 Ω
R3
Resistance
27.4 Ω
Reviews
- Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portaljharwinbarrozo43.0M
- Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #powerjharwinbarrozo11.4M
- A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibraryjharwinbarrozo1.5M
- A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #genericsjharwinbarrozo15.5k
- An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.Terminal
- 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlinkjharwinbarrozo1.2M
- 10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcanjharwinbarrozo1.2M
- Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlinkjharwinbarrozo1.1M
RP2040 Dual TLC5940 High-Current LED Driver Board
Properties
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $7.42–$7.80 |
Digi-Key | $7.64–$11.40 |
LCSC | $7.62–$7.97 |
Mouser | $10.01 |
TME | $1.21 |
Verical | $1.47–$3.20 |
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