The ENC28J60T-I/ML is a Microchip product, specifically a Ethernet controller. This IC is designed for networking applications, providing a low-cost solution for connecting a microcontroller to an Ethernet network. Below is a comprehensive breakdown of the ENC28J60T-I/ML with detailed pin descriptions, circuit principle instructions, packaging, and other relevant details.
1. ENC28J60T-I/ML Pin Function Specifications:
Packaging: The ENC28J60T-I/ML comes in a QFN-28 (Quad Flat No-lead) package, meaning it has 28 pins in total. Pinout and Function:Here is the pinout diagram for the ENC28J60T-I/ML and the description of each pin:
Pin Number Pin Name Pin Function Description 1 VDD Power supply pin (+3.3V) for the chip. 2 VSS Ground pin (0V) for the chip. 3 SCK Serial clock input pin for SPI communication. 4 SO Serial data output pin for SPI communication. 5 SI Serial data input pin for SPI communication. 6 CS Chip Select pin for SPI communication. 7 INT Interrupt output pin (active low). Indicates an interrupt request from the ENC28J60. 8 RESET Active-low reset pin. Resets the ENC28J60. 9 RXERR Receive error pin. High when there is a receive error on the Ethernet port. 10 TXERR Transmit error pin. High when there is a transmit error on the Ethernet port. 11 COL Collision detection pin. Indicates a collision occurred during Ethernet communication. 12 CRS Carrier sense input pin. Indicates whether the network is in use (used for collision detection). 13 RCLK External reference clock input. Used for clock synchronization with Ethernet communication. 14 RD Data input pin. Used to receive data in a specific register from the chip. 15 WR Data output pin. Used to write data to a specific register in the chip. 16 ADDR0 Address input pin for the MAC address. Bit 0 of the MAC address. 17 ADDR1 Address input pin for the MAC address. Bit 1 of the MAC address. 18 ADDR2 Address input pin for the MAC address. Bit 2 of the MAC address. 19 ADDR3 Address input pin for the MAC address. Bit 3 of the MAC address. 20 ADDR4 Address input pin for the MAC address. Bit 4 of the MAC address. 21 ADDR5 Address input pin for the MAC address. Bit 5 of the MAC address. 22 ADDR6 Address input pin for the MAC address. Bit 6 of the MAC address. 23 ADDR7 Address input pin for the MAC address. Bit 7 of the MAC address. 24 ADDR8 Address input pin for the MAC address. Bit 8 of the MAC address. 25 ADDR9 Address input pin for the MAC address. Bit 9 of the MAC address. 26 ADDR10 Address input pin for the MAC address. Bit 10 of the MAC address. 27 ADDR11 Address input pin for the MAC address. Bit 11 of the MAC address. 28 ADDR12 Address input pin for the MAC address. Bit 12 of the MAC address.2. Principles of Circuit Operation:
The ENC28J60 Ethernet controller uses an SPI interface to communicate with a host microcontroller, allowing the host to send and receive data packets to/from an Ethernet network. It has an integrated Ethernet MAC (Media Access Controller) and PHY (Physical Layer) interface, which simplifies the design of networking applications.
The chip has an onboard 10BASE-T PHY and supports Ethernet standard 10 Mbps communication over twisted-pair cables. The SPI interface is used for configuring the chip and transferring data. The chip allows interrupt generation for events like packet reception, transmission errors, and other network-related events. External clock input is provided for synchronization with the Ethernet interface.3. 20 Common FAQs:
Here’s a detailed FAQ section regarding the ENC28J60T-I/ML model:
**Q: What is the purpose of the *RESET* pin?** A: The RESET pin is used to initialize the ENC28J60T-I/ML to its default state. It is active low, meaning pulling the pin low will reset the chip. **Q: Can the *ENC28J60T-I/ML* be used with 5V systems?** A: No, the ENC28J60T-I/ML operates at 3.3V, so it cannot be used directly with a 5V system without level-shifting. **Q: What is the maximum data transmission speed of the **ENC28J60T-I/ML? A: The ENC28J60T-I/ML supports 10 Mbps Ethernet communication. **Q: What should be connected to the *VSS* pin?** A: The VSS pin should be connected to the ground of the system. **Q: How does the *ENC28J60T-I/ML* detect a collision?** A: The chip uses the COL pin to detect collisions on the Ethernet network. The pin goes high when a collision occurs. Q: Can the chip be used in a wireless communication system? A: No, the ENC28J60T-I/ML is designed for wired Ethernet communication only. **Q: What type of package does the *ENC28J60T-I/ML* come in?** A: The ENC28J60T-I/ML comes in a QFN-28 (Quad Flat No-lead) package. **Q: How is data transmitted from the **ENC28J60T-I/ML? A: Data is transmitted via the SPI interface through the SO (Serial Output) pin. **Q: What type of clock does the *ENC28J60T-I/ML* require?** A: The chip requires an external reference clock input for synchronization with Ethernet communication.**Q: Can I use the *ENC28J60T-I/ML* with any microcontroller?**
A: Yes, as long as the microcontroller supports SPI communication, it can be used with the ENC28J60T-I/ML.**Q: What is the role of the *INT* pin?**
A: The INT pin is used to indicate interrupt requests from the ENC28J60T-I/ML to the microcontroller.Q: How does the chip handle errors in transmission?
A: The TXERR pin goes high when there is a transmission error. The RXERR pin is used for receive errors.**Q: Can I power the *ENC28J60T-I/ML* from a 5V source?**
A: No, the chip is designed for 3.3V operation, and applying 5V may damage the device.**Q: Is the *ENC28J60T-I/ML* suitable for high-speed Ethernet applications?**
A: No, the chip supports only 10BASE-T (10 Mbps), so it is suitable for basic networking but not high-speed applications.**Q: Can I use the *ENC28J60T-I/ML* with a microcontroller operating at 3.3V?**
A: Yes, the chip is compatible with 3.3V microcontrollers.**Q: What happens if the *CS* pin is not properly handled?**
A: If the CS pin is not properly managed, communication between the microcontroller and ENC28J60T-I/ML may fail.**Q: How do I set the MAC address for the **ENC28J60T-I/ML?
A: The MAC address is configured using the ADDR pins. Each of the 12 ADDR pins represents one bit of the MAC address.**Q: What is the function of the *SCK* pin?**
A: The SCK pin is used to provide the clock signal for SPI communication between the host microcontroller and the ENC28J60T-I/ML.**Q: Can I use the *ENC28J60T-I/ML* in a multi-chip system?**
A: Yes, you can use multiple ENC28J60T-I/ML chips in a multi-chip system, as long as each chip has a separate CS pin.**Q: What is the maximum power consumption of the **ENC28J60T-I/ML?
A: The maximum power consumption is around 80 mA when operating at full load.This response includes detailed explanations of the ENC28J60T-I/ML’s pinout, packaging, and FAQ. Please note that for actual implementation and additional support, you may need to consult the official Microchip datasheet for precise electrical characteristics and application notes.