MCP2515 T-I-ST Detailed explanation of pin function specifications and circuit principle instructions

The MCP2515T-I/ST is a product manufactured by Microchip Technology Inc.. It is a standalone CAN (Controller Area Network) controller that communicates with a host microcontroller through an SPI interface . Below is a detailed explanation of the pin functions, the package type, and the full pinout specifications for the MCP2515T-I/ST, as well as a FAQ section related to this product.

Package Type and Pin Count

The MCP2515T-I/ST comes in a TQFP-28 package, which contains 28 pins.

Full Pinout and Detailed Pin Function List

Pin Number Pin Name Pin Function Description 1 VDD Supply voltage for the MCP2515. Typically +5V or +3.3V depending on the configuration. 2 VSS Ground pin. Connect to the system ground. 3 VIO I/O voltage reference for SPI communication. Connect to logic voltage source (3.3V or 5V). 4 TX0 CAN Transmit Data Pin 0. This pin outputs data from the MCP2515 to the CAN bus. 5 RX0 CAN Receive Data Pin 0. This pin receives data from the CAN bus to the MCP2515. 6 TX1 CAN Transmit Data Pin 1 (optional). Used in dual CAN mode to transmit data on CAN Bus 1. 7 RX1 CAN Receive Data Pin 1 (optional). Used in dual CAN mode to receive data from CAN Bus 1. 8 SCK SPI Clock input pin. Receives the clock signal from the host MCU for SPI communication. 9 MISO Master In Slave Out. This pin transmits data from the MCP2515 to the host MCU. 10 MOSI Master Out Slave In. This pin receives data from the host MCU to the MCP2515. 11 CS Chip Select pin for SPI communication. The MCP2515 is selected when this pin is low. 12 INT Interrupt output pin. This pin is used to signal the host MCU when an interrupt occurs. 13 RST Reset input pin. When driven low, this pin resets the MCP2515. 14 SDO SPI Data Output pin (alternative MISO). Provides data from MCP2515 to the MCU. 15 GND Ground. Connect to the system ground. 16 VDD Supply voltage input pin for internal Power . 17 VSS Ground pin. Connect to the system ground. 18 RX2 CAN Receive Data Pin 2 (optional, used in triple CAN mode). 19 TX2 CAN Transmit Data Pin 2 (optional, used in triple CAN mode). 20 MCLR Master Clear Reset pin (optional). Can be used to reset the chip via external circuitry. 21 RX3 CAN Receive Data Pin 3 (optional, used in quad CAN mode). 22 TX3 CAN Transmit Data Pin 3 (optional, used in quad CAN mode). 23 NC No Connect (unused pin). 24 NC No Connect (unused pin). 25 NC No Connect (unused pin). 26 NC No Connect (unused pin). 27 NC No Connect (unused pin). 28 NC No Connect (unused pin).

Pinout Overview:

VDD/VSS: Power supply pins TX/RX: CAN data transmission and reception pins SPI interface: SCK, MOSI, MISO, CS, and INT Additional control pins: RST (Reset), MCLR (optional reset), and other CAN interface pins depending on configuration.

Frequently Asked Questions (FAQ)

What is the supply voltage for the MCP2515T-I/ST? The supply voltage (VDD) for the MCP2515T-I/ST is typically 5V or 3.3V depending on the logic level requirements. How does the MCP2515T-I/ST communicate with a microcontroller? The MCP2515T-I/ST communicates with a microcontroller via the SPI interface. The required pins are SCK, MOSI, MISO, CS, and INT. What are the functions of the TX and RX pins? The TX and RX pins are used for CAN bus communication. TX is for transmitting data to the bus, and RX is for receiving data from the bus. Can the MCP2515T-I/ST handle multiple CAN channels? Yes, the MCP2515T-I/ST supports multiple CAN channels (e.g., dual CAN or quad CAN) depending on the variant and configuration. How is the MCP2515T-I/ST reset? The MCP2515T-I/ST can be reset by applying a low signal to the RST pin or using an external MCLR pin. What is the function of the INT pin? The INT pin is an interrupt output. It signals the microcontroller when a specific event (such as an error or data reception) occurs. What is the maximum data rate for the MCP2515T-I/ST? The MCP2515T-I/ST can operate at up to 1 Mbps data rate on the CAN bus. What is the role of the VIO pin? The VIO pin provides the logic voltage reference for SPI communication. It should match the logic level of the connected microcontroller (either 3.3V or 5V). How do you configure the MCP2515T-I/ST? Configuration is done via SPI by sending control and data commands from the host microcontroller to the MCP2515.

What is the maximum current consumption for the MCP2515T-I/ST?

The current consumption depends on the operating voltage, but it typically ranges from 15 mA to 20 mA in normal operation.

What are the CAN bus voltages for TX and RX?

The TX and RX voltages follow the standards for CAN communication, typically 2.0V to 3.5V for logic high and below 1.5V for logic low.

Can the MCP2515T-I/ST be used in automotive applications?

Yes, the MCP2515T-I/ST is designed for use in automotive and industrial applications where CAN communication is required.

What is the typical clock speed for SPI?

The typical SPI clock speed can vary, but it is often set between 1 MHz and 10 MHz, depending on the system's performance.

Does the MCP2515T-I/ST have built-in error handling?

Yes, the MCP2515T-I/ST includes error detection and handling features for CAN communication, including bit error detection and error counters.

Can the MCP2515T-I/ST support extended CAN frame formats?

Yes, it supports both standard and extended CAN frame formats, including CAN 2.0A and CAN 2.0B.

How do you enable and disable the CAN bus on the MCP2515T-I/ST?

CAN bus operation is controlled via the SPI interface by setting specific control registers.

Is the MCP2515T-I/ST compatible with all microcontrollers?

Yes, the MCP2515T-I/ST is compatible with most microcontrollers that support SPI communication.

What type of CAN bus does the MCP2515T-I/ST support?

The MCP2515T-I/ST supports the standard CAN 2.0A and 2.0B protocol versions.

What is the function of the SCK pin?

The SCK pin is the clock input for SPI communication. It synchronizes data transfer between the MCP2515T-I/ST and the microcontroller.

Is there a built-in watchdog timer on the MCP2515T-I/ST?

Yes, the MCP2515T-I/ST has an internal watchdog timer that can be enabled to reset the chip in case of malfunction.

This detailed explanation covers the pin functions, FAQ, and package specifications for the MCP2515T-I/ST in full.