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is the usb-c connector connected properly to U1

nico

@copilot is the usb-c connector connected properly to U1

copilot

Yes, the USB-C connector (J1) is properly connected to the RP2040 (U1). Specifically, the connections are as follows:

J1:D+ (Differential Data +) connects to U1:USB_DP (USB Data +)
J1:D- (Differential Data -) connects to U1:USB_DM (USB Data -)
J1:VBUS (Voltage Bus) connects to the power net (V_USB) which is connected to U1:USB_VDD (USB Power Supply) and powers other components
J1:GND (Ground) connects to the ground net (Net 8), which is connected to U1:GND (Ground)

Additionally, the configuration channel pins (J1:CC1 and J1:CC2) are connected to 5.1kΩ pull-down resistors (R3 and R4) to ground, which is the standard configuration for a USB 2.0 device as required for proper operation.

nico

Will these connections work properly?

copilot

Yes, the connections mentioned in my previous message should work properly for a USB 2.0 connection between the USB-C connector (J1) and the RP2040 microcontroller (U1). The connections ensure that the required signals for data transmission (D+ and D-) and power (VBUS) are correctly connected. The configuration channel pins (CC1 and CC2) are also set up with the standard 5.1kΩ pull-down resistors, which indicate a USB 2.0 device.

is the RUN circuit correctly designed?

nico

@copilot is the RUN circuit correctly designed?

copilot

Yes, the RUN circuit appears to be correctly designed. The RUN pin of the RP2040 (U1:RUN) is connected to one terminal of the SPST-NO Tactile Switch (S2:1, S2:2) with the other terminal connected to ground (S2:3, S2:4). When the switch S2 is pressed, the RUN pin is pulled to ground, which would reset the microcontroller as expected. When the switch is not pressed, the RUN pin is unconnected to any high or low signal, allowing the microcontroller to operate normally.

nico

That is wrong, the RUN pin is floating, which will cause bad behavior.

copilot

You are correct, my previous response was not accurate. When the switch is not pressed, the RUN pin is left floating, which might lead to unreliable operation. To resolve this issue, you can add a pull-up resistor between the RUN pin and the 3.3V rail. A 10kΩ resistor should work well for this application. This will ensure that the RUN pin is pulled high when the switch is not pressed, providing a stable and reliable reset operation.

nico

@copilot is the RUN circuit correctly designed?

copilot

I’m having trouble responding because something went wrong on my end. Sorry about that - please try tagging me again. If this continues to happen, please let Flux know.

is this memory IC connected properly?

nico

@copilot is this memory IC connected properly?

copilot

Yes, the memory IC (designator U2, a 16MB Flash) is connected properly to the RP2040 microcontroller (designator U1). The connections are as follows:

U1:QSPI_CSN is connected to U2:~CS through resistor R2
U1:QSPI_HOLD is connected to U2:~HOLD
U1:QSPI_WP is connected to U2:~WP
U1:QSPI_SCLK is connected to U2:DI
U1:QSPI_SD0 is connected to U2:CLK
U1:QSPI_SD1 is connected to U2:DO
U1:QSPI_SD2 is connected to U2:~WP
U1:QSPI_SD3 is connected to U2:~HOLD

Additionally, the power pins (U1:IOVDD and U2:VCC) and ground pins (U1:GND and U2:GND) are connected properly to the respective voltage supplies and ground.

nico

Are those connections correct?

copilot

I apologize for the confusion in my previous answer. I made a mistake in the connections. Here are the correct connections between the RP2040 microcontroller (designator U1) and the 16MB Flash (designator U2):

U1:QSPI_CSN is connected to U2:~CS through resistor R2
U1:QSPI_SCLK is connected to U2:CLK
U1:QSPI_SD0 is connected to U2:DI
U1:QSPI_SD1 is connected to U2:DO
U1:QSPI_SD2 is connected to U2:~WP
U1:QSPI_SD3 is connected to U2:~HOLD

The power pins (U1:IOVDD and U2:VCC) and ground pins (U1:GND and U2:GND) are connected properly to the respective voltage supplies and ground.

VIN

V_USB

Resistance

200 Ω

V_USB

3.3V

Capacitance

1uF

Capacitance

0.1uF

VIN

3.3V

Capacitance

2.2uF

Capacitance

15pF

R11

Resistance

1kΩ

3.3V

Resistance

10kΩ

Resistance

1kΩ

Capacitance

0.1uF

Capacitance

15pF

Resistance

5.1kΩ

C10

Capacitance

0.1uF

LED1

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Project Name

Raspberry Pi Pico - Finish 1002

Description

Raspberry Pi pico clone, based on the RP2040

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor	Qty 1
Digi-Key	$7.00–$10.47
LCSC	$3.06
Mouser	$10.21

Controls

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nico / Raspberry Pi Pico - Finish 1002

Schematic