The MCP2518FDT-E/QBB is a part of the Microchip Technology family. It is a CAN FD (Flexible Data-rate) controller with a SPI interface designed for automotive and industrial applications.
Package Type:
The MCP2518FDT-E/QBB is in the QFN (Quad Flat No-lead) package, specifically with a 28-pin configuration.Pinout and Pin Function Specifications:
Below is the pinout of the MCP2518FDT-E/QBB (28 pins). The pins serve different functions, ranging from communication, Power supply, to grounding.
Pinout Table: Pin No Pin Name Pin Function Description 1 VDD Power supply for the device. Typically powered by a 3.3V source. 2 VSS Ground pin for the device. 3 SCK SPI Clock input for communication. 4 SDI SPI data input. Used for receiving data into the device from the SPI master. 5 SDO SPI data output. Used for sending data from the device to the SPI master. 6 CS Chip Select pin for SPI communication. Indicates to the MCP2518FDT-E/QBB whether it is the active slave in the SPI bus. 7 INT Interrupt output. This pin generates interrupt signals to alert the microcontroller or system processor to an event or status change. 8 TX0 Transmit pin for CAN channel 0. Used for sending data via CAN bus for channel 0. 9 RX0 Receive pin for CAN channel 0. Used for receiving data via CAN bus for channel 0. 10 TX1 Transmit pin for CAN channel 1. Used for sending data via CAN bus for channel 1. 11 RX1 Receive pin for CAN channel 1. Used for receiving data via CAN bus for channel 1. 12 TX2 Transmit pin for CAN channel 2. Used for sending data via CAN bus for channel 2. 13 RX2 Receive pin for CAN channel 2. Used for receiving data via CAN bus for channel 2. 14 RST Reset pin. This pin is used to reset the device to its initial state. 15 CLKOUT Clock output. This provides a clock signal derived from the internal oscillator, usable by other connected devices. 16 CANH CAN high level signal for all CAN channels (CAN channel 0, 1, or 2). 17 CANL CAN low level signal for all CAN channels (CAN channel 0, 1, or 2). 18 VREF Voltage Reference pin. Used to set the reference voltage for the internal analog circuits. 19 VDDIO Power input for the digital IO section of the device. Typically tied to a voltage of 3.3V. 20 GND Ground pin for the digital IO section. 21 NC No connection. 22 NC No connection. 23 NC No connection. 24 NC No connection. 25 NC No connection. 26 NC No connection. 27 NC No connection. 28 NC No connection.Detailed Pin Function Explanation:
VDD: The power supply pin. It is the source that powers the internal circuitry of the MCP2518FDT-E/QBB. VSS: Ground pin for the internal circuits of the device. SCK (SPI Clock): This pin is used to provide the clock signal for SPI communication. SDI (SPI Data Input): This pin is used for inputting data into the MCP2518FDT-E/QBB from the microcontroller or other SPI master. SDO (SPI Data Output): This pin is used for outputting data from the MCP2518FDT-E/QBB to the SPI master device. CS (Chip Select): This pin is used to indicate whether the MCP2518FDT-E/QBB is selected for SPI communication. INT (Interrupt): This pin is used to send interrupt signals to the system. It alerts the microcontroller or processor to important events or status changes. TX0 (Transmit Channel 0): This pin is used to send data on the CAN bus for channel 0. RX0 (Receive Channel 0): This pin is used to receive data from the CAN bus for channel 0. TX1 (Transmit Channel 1): This pin is used to send data on the CAN bus for channel 1. RX1 (Receive Channel 1): This pin is used to receive data from the CAN bus for channel 1. TX2 (Transmit Channel 2): This pin is used to send data on the CAN bus for channel 2. RX2 (Receive Channel 2): This pin is used to receive data from the CAN bus for channel 2. RST (Reset): This pin is used to reset the device to its default state. CLKOUT (Clock Output): This pin outputs a clock signal derived from the internal oscillator of the MCP2518FDT-E/QBB. CANH (CAN High): This is the high signal of the CAN bus. Used for communication on all three CAN channels. CANL (CAN Low): This is the low signal of the CAN bus. Used for communication on all three CAN channels. VREF (Voltage Reference): This pin is used to provide a voltage reference for the analog components inside the device. VDDIO (Digital IO Power): This pin powers the digital IO section of the device, which typically requires 3.3V. GND (Ground): Ground for the digital IO section. 21-28. NC (No Connection): These pins are not connected to any internal circuitry and do not serve any functional purpose.20 Common FAQ:
Q: What is the MCP2518FDT-E/QBB used for? A: The MCP2518FDT-E/QBB is used for CAN FD (Flexible Data-rate) communication, typically in automotive or industrial applications. It connects microcontrollers to the CAN bus system via an SPI interface.
Q: How does SPI communication work with the MCP2518FDT-E/QBB? A: SPI allows for serial communication between the MCP2518FDT-E/QBB and a microcontroller. The pins SCK, SDI, SDO, and CS are used to transfer data between the devices.
Q: What voltage levels does the MCP2518FDT-E/QBB support? A: The MCP2518FDT-E/QBB operates at 3.3V for VDD and VDDIO, with the logic levels compatible with 3.3V systems.
Q: Can the MCP2518FDT-E/QBB be used in a 5V system? A: No, the MCP2518FDT-E/QBB is designed to work with 3.3V logic. You should use level shifters if interfacing with 5V logic systems.
Q: What is the purpose of the INT pin? A: The INT pin is used to signal the microcontroller or processor when an interrupt occurs, such as an event or status change.
Q: How many CAN channels does the MCP2518FDT-E/QBB support? A: The MCP2518FDT-E/QBB supports up to 3 CAN channels, each with a separate transmit (TX) and receive (RX) pin.
Q: What are the maximum speeds supported by the CAN bus in MCP2518FDT-E/QBB? A: The MCP2518FDT-E/QBB supports CAN FD with data rates up to 8 Mbps for CAN data transmission.
Q: How is the reset function triggered on the MCP2518FDT-E/QBB? A: The reset function is triggered by pulling the RST pin low, which resets the device to its default state.
Q: What is the CLKOUT pin used for? A: The CLKOUT pin provides a clock signal derived from the internal oscillator of the MCP2518FDT-E/QBB for use by other devices.
Q: Can the MCP2518FDT-E/QBB be powered by 5V? A: No, the MCP2518FDT-E/QBB operates with a 3.3V power supply. 5V operation is not supported.
Q: What are the applications of the MCP2518FDT-E/QBB? A: It is typically used in automotive, industrial automation, and other applications requiring CAN FD communication, such as ECUs, sensors, and gateways.
Q: What does the CANH and CANL pins do? A: CANH and CANL are the differential signals of the CAN bus, with CANH carrying the high signal and CANL carrying the low signal for data transmission.
Q: How can I interface the MCP2518FDT-E/QBB with my microcontroller? A: Use SPI for communication with the microcontroller. Connect the SCK, SDI, SDO, and CS pins for the SPI interface.
Q: What is the purpose of the VREF pin? A: The VREF pin provides a reference voltage to the internal analog circuitry, ensuring proper operation.
Q: Is the MCP2518FDT-E/QBB suitable for automotive use? A: Yes, the MCP2518FDT-E/QBB is designed for automotive applications and is compliant with automotive-grade specifications.
Q: What is the role of the VDDIO pin? A: The VDDIO pin powers the digital I/O section of the MCP2518FDT-E/QBB, typically requiring 3.3V.
Q: Can the MCP2518FDT-E/QBB operate without a microcontroller? A: No, the MCP2518FDT-E/QBB requires a microcontroller or processor to manage the CAN communication and SPI interface.
Q: What is the purpose of the CAN FD protocol? A: The CAN FD protocol allows for faster data rates and larger data payloads compared to traditional CAN, making it ideal for modern automotive and industrial applications.
Q: Can I use the MCP2518FDT-E/QBB with older CAN protocols? A: Yes, the MCP2518FDT-E/QBB supports both standard CAN 2.0 and the newer CAN FD protocol.
Q: How do I configure the MCP2518FDT-E/QBB? A: Configuration of the MCP2518FDT-E/QBB is done via SPI commands. The device uses its internal registers for configuration, which can be programmed by the microcontroller.
This detailed explanation covers all pin functions and frequently asked questions related to the MCP2518FDT-E/QBB.