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ENC28J60 Ethernet Board

3 years ago 6509
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Description

ENC28J60 Ethernet Project Stand-Alone Ethernet Controller with SPI Controller. Ethernet Controller Features • IEEE 802.3 compatible Ethernet controller • Integrated MAC and 10BASE-T PHY • Supports one 10BASE-T port with automatic polarity detection and correction • Supports Full and Half-Duplex modes • Programmable automatic retransmit on collision • Programmable padding and CRC generation • Programmable automatic rejection of erroneous packets • SPI Interface with clock speeds up to 20 MHz

Buffer • 8-Kbyte transmit/receive packet dual port SRAM • Configurable transmit/receive buffer size • Hardware-managed circular receive FIFO • Byte-wide random and sequential access with auto-increment • Internal DMA for fast data movement • Hardware assisted checksum calculation for various network protocols

Medium Access Controller (MAC) Features • Supports Unicast, Multicast and Broadcast packets • Programmable receive packet filtering and wake-up host on logical AND or OR of the following:

  • Unicast destination address
  • Multicast address
  • Broadcast address
  • Magic Packet™
  • Group destination addresses as defined by 64-bit hash table
  • Programmable pattern matching of up to 64 bytes at user-defined offset

Physical Layer (PHY) Features • Loopback mode • Two programmable LED outputs for LINK, TX, RX, collision and full/half-duplex status

Operational • Six interrupt sources and one interrupt output pin • 25 MHz clock input requirement • Clock out pin with programmable prescaler • Operating voltage of 3.1V to 3.6V (3.3V typical) • 5V tolerant inputs • Temperature range: -40°C to +85°C Industrial, 0°C to +70°C Commercial (SSOP only) • 28-pin SPDIP, SSOP, SOIC, QFN packages

1.0 OVERVIEW
The ENC28J60 is a stand-alone Ethernet controller
with an industry standard Serial Peripheral Interface
(SPI). It is designed to serve as an Ethernet network
interface for any controller equipped with SPI.
The ENC28J60 meets all of the IEEE 802.3 specifications. It incorporates a number of packet filtering
schemes to limit incoming packets. It also provides an internal DMA module for fast data throughput and hardware assisted checksum calculation, which is used in
various network protocols. Communication with the host controller is implemented via an interrupt pin and the SPI, with clock rates of up to 20 MHz. Two dedicated pins are used for LED link and network activity
indication. A simple block diagram of the ENC28J60 is shown in
Figure 1-1. A typical application circuit using the device
is shown in Figure 1-2. With the ENC28J60, two pulse
transformers and a few passive components are all that is required to connect a microcontroller to an Ethernet network. The ENC28J60 consists of seven major functional
blocks:

  1. An SPI interface that serves as a communication channel between the host controller and the ENC28J60.
  2. Control Registers which are used to control and monitor the ENC28J60.
  3. A dual port RAM buffer for received and transmitted data packets.
  4. An arbiter to control the access to the RAM buffer when requests are made from DMA, transmit and receive blocks.
  5. The bus interface that interprets data and commands received via the SPI interface.
  6. The MAC (Medium Access Control) module that implements IEEE 802.3 compliant MAC logic.
  7. The PHY (Physical Layer) module that encodes and decodes the analog data that is present on the twisted pair interface. The device also contains other support blocks, such as the oscillator, on-chip voltage regulator, level translators to provide 5V tolerant I/Os and system control logic.

Documents

ENC28J60 Schematic

ENC28J60 PCB

BOM

ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted
1 ENC28J60 U1 SSOP28DB 1
2 1u C1,C2,C3,C4,C5,C6,C9,C10,C11,C12 C0805 10
3 1k R1,R2,R3,R4,R5,R6,R7 C0805 7
4 XTALfast 25MHZ 1X02 1
5 20p C7,C8 C0805 2
6 HDR2X6 P1 HDR2X5 1
7 CON-RJ45-F ETH1 HR911105A 1

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Comments (3)

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