The CP2102N-A02-GQFN24R is a USB-to-UART bridge controller produced by Silicon Labs (a well-known company that designs semiconductors and integrated circuits for various applications). This specific model is part of their CP2100 series, which provides high-performance, full-featured USB-to-UART bridging solutions.
Package Type:
The CP2102N-A02-GQFN24R is in a QFN-24 (Quad Flat No-lead) package. This means it has 24 pins that connect to the circuit board via flat leads on the underside of the component.
Pin Function Table:
Here is a detailed breakdown of the CP2102N-A02-GQFN24R with its 24 pins and their respective functions.
Pin Number Pin Name Function Description 1 VDD Power supply input. Typically 3.3V or 5V, depending on the configuration. 2 TXD UART Transmit Data. Sends data to the connected device. 3 RXD UART Receive Data. Receives data from the connected device. 4 RTS# Request to Send (active low). UART signal used for hardware flow control. 5 CTS# Clear to Send (active low). UART signal used for hardware flow control. 6 DTR# Data Terminal Ready (active low). Signals readiness for communication in UART. 7 DSR# Data Set Ready (active low). Indicates the status of the device in UART communication. 8 DCD# Data Carrier Detect (active low). Used in modem communication for detecting a carrier signal. 9 RI# Ring Indicator (active low). Indicates an incoming call in modem communication. 10 VSS Ground. The reference ground for the system. 11 GND Another Ground pin to ensure stable system operation. 12 SUSPEND# Suspend state signal (active low). Used in USB communication to indicate the suspend mode. 13 RESET# Reset signal (active low). Used to reset the chip. 14 VBUS USB bus power input. Used for USB 5V power supply. 15 DP USB Data Plus (D+). The USB data transmission line. 16 DM USB Data Minus (D-). The USB data transmission line. 17 INT# Interrupt signal (active low). Used to notify the system of an event. 18 SCL Serial Clock Line (I2C). Used for clock signals in I2C communication. 19 SDA Serial Data Line (I2C). Used for data transfer in I2C communication. 20 IOREF Reference Voltage for I/O pins. Determines voltage for logic levels. 21 NC No Connection. This pin is not connected to anything internally. 22 NC No Connection. Another pin that is unused. 23 NC No Connection. Another pin that is unused. 24 NC No Connection. Another pin that is unused.FAQ (Frequently Asked Questions):
What is the CP2102N-A02-GQFN24R used for? The CP2102N-A02-GQFN24R is a USB-to-UART bridge controller, allowing USB devices to communicate with UART devices such as microcontrollers, sensors, and other peripherals.
What is the function of the TXD and RXD pins? TXD (Transmit Data) is used to send data from the USB host to a UART device, while RXD (Receive Data) is used to receive data from the UART device to the USB host.
What are RTS# and CTS# used for? RTS# (Request to Send) and CTS# (Clear to Send) are hardware flow control signals used to manage data transmission and avoid data loss or overflow.
What voltage should be applied to VDD? VDD should typically be supplied with 3.3V or 5V, depending on the voltage level of the UART device you're interfacing with.
What is the purpose of the RESET# pin? RESET# is used to reset the CP2102N-A02-GQFN24R. It is an active low signal, meaning when it is driven low, the device will reset.
What does the SUSPEND# pin do? The SUSPEND# pin indicates the suspend state in USB communication. When active low, it puts the device into a low-power mode.
Can the CP2102N-A02-GQFN24R communicate via USB and UART simultaneously? Yes, the CP2102N-A02-GQFN24R facilitates communication between a USB host and a UART device simultaneously.
What is the purpose of the INT# pin? The INT# pin is used to interrupt the host system. It is an active low signal that alerts the host to an event that requires attention.
How do I use the CP2102N-A02-GQFN24R in I2C communication? The SCL and SDA pins enable I2C communication, with SCL providing the clock signal and SDA carrying data.
What is the significance of the VBUS pin? VBUS is the USB bus power input pin, which receives 5V from the USB host for powering the device.
What are DTR# and DSR# used for? DTR# (Data Terminal Ready) and DSR# (Data Set Ready) are UART control signals used to manage the connection status and readiness for data exchange.
What does the DCD# pin do? DCD# (Data Carrier Detect) is used in modem communication to detect the presence of a carrier signal.
What does the RI# pin do? RI# (Ring Indicator) is used in modem applications to signal an incoming call.
What is the function of the VSS and GND pins? VSS and GND are both ground pins used to establish a reference point for the system's power supply.
Is there any pin that is not connected on the CP2102N-A02-GQFN24R? Yes, there are several "NC" (No Connection) pins that are not connected to any internal circuitry.
What happens if I don't use the INT# pin? If the INT# pin is not used, you will not be able to receive interrupt signals from the CP2102N-A02-GQFN24R, and polling will be needed to check for events.
What should be connected to the VBUS pin? The VBUS pin should be connected to the 5V power supply from the USB host to power the device.
Can I use the CP2102N-A02-GQFN24R for high-speed USB communication? Yes, the CP2102N-A02-GQFN24R supports full-speed USB (12 Mbps) communication.
What is the difference between TXD and RXD? TXD is the data transmission pin used to send data from the CP2102N-A02-GQFN24R, while RXD is used to receive data from an external UART device.
How do I determine the correct power supply for the CP2102N-A02-GQFN24R? You should supply the device with 3.3V or 5V, depending on the voltage specifications of the connected UART device. Always consult the datasheet for specific power requirements.
These details cover all 24 pins and provide in-depth answers to common questions about the CP2102N-A02-GQFN24R.
