SNLS250E May   2008  – April 2015 DP83848H , DP83848J , DP83848K , DP83848M , DP83848T

PRODUCTION DATA.  

  1. 1Device Overview
    1. 1.1 Features
    2. 1.2 Applications
    3. 1.3 Description
    4. 1.4 Functional Block Diagram
  2. 2Revision History
  3. 3 Device Comparison
  4. 4Pin Configuration and Functions
    1. 4.1  Pin Diagram
    2. 4.2  Package Pin Assignments
    3. 4.3  Serial Management Interface
    4. 4.4  Mac Data Interface
    5. 4.5  Clock Interface
    6. 4.6  LED Interface
    7. 4.7  Reset
    8. 4.8  Strap Options
    9. 4.9  10 Mb/s and 100 Mb/s PMD Interface
    10. 4.10 Special Connections
    11. 4.11 Power Supply Pins
  5. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 DC Specifications
    6. 5.6 AC Timing Requirements
  6. 6Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Auto-Negotiation
        1. 6.3.1.1 Auto-Negotiation Pin Control
        2. 6.3.1.2 Auto-Negotiation Register Control
        3. 6.3.1.3 Auto-Negotiation Parallel Detection
        4. 6.3.1.4 Auto-Negotiaion Restart
        5. 6.3.1.5 Auto-Negotiation Complete Time
      2. 6.3.2 Auto-MDIX
      3. 6.3.3 LED Interface
        1. 6.3.3.1 LED
        2. 6.3.3.2 LED Direct Control
      4. 6.3.4 Internal Loopback
      5. 6.3.5 BIST
      6. 6.3.6 Energy Detect Mode
    4. 6.4 Device Functional Modes
      1. 6.4.1 MII Interface
        1. 6.4.1.1 Nibble-wide MII Data Interface
        2. 6.4.1.2 Collision Detect
        3. 6.4.1.3 Carrier Sense
      2. 6.4.2 Reduced MII Interface
      3. 6.4.3 802.3 MII Serial Management Interface
        1. 6.4.3.1 Serial Management Register Access
        2. 6.4.3.2 Serial Management Access Protocol
        3. 6.4.3.3 Serial Management Preamble Suppression
      4. 6.4.4 PHY Address
        1. 6.4.4.1 MII Isolate Mode
      5. 6.4.5 Half Duplex vs Full Duplex
      6. 6.4.6 Reset Operation
        1. 6.4.6.1 Hardware Reset
        2. 6.4.6.2 Software Reset
      7. 6.4.7 Power Down
    5. 6.5 Programming
      1. 6.5.1 Architecture
        1. 6.5.1.1 100BASE-TX Transmitter
          1. 6.5.1.1.1 Code-Group Encoding and Injection
          2. 6.5.1.1.2 Scrambler
          3. 6.5.1.1.3 NRZ to NRZI Encoder
          4. 6.5.1.1.4 Binary to MLT-3 Convertor
        2. 6.5.1.2 100BASE-TX Receiver
          1. 6.5.1.2.1  Analog Front End
          2. 6.5.1.2.2  Digital Signal Processor
          3. 6.5.1.2.3  Digital Adaptive Equalization and Gain Control
          4. 6.5.1.2.4  Base Line Wander Compensation
          5. 6.5.1.2.5  Signal Detect
          6. 6.5.1.2.6  MLT-3 to NRZI Decoder
          7. 6.5.1.2.7  NRZI to NRZ
          8. 6.5.1.2.8  Serial to Parallel
          9. 6.5.1.2.9  Descrambler
          10. 6.5.1.2.10 Code-Group Alignment
          11. 6.5.1.2.11 4B/5B Decoder
          12. 6.5.1.2.12 100BASE-TX Link Integrity Monitor
          13. 6.5.1.2.13 Bad SSD Detection
        3. 6.5.1.3 10BASE-T Transceiver Module
          1. 6.5.1.3.1  Operational Modes
          2. 6.5.1.3.2  Smart Squelch
          3. 6.5.1.3.3  Collision Detection and SQE
          4. 6.5.1.3.4  Carrier Sense
          5. 6.5.1.3.5  Normal Link Pulse Detection/Generation
          6. 6.5.1.3.6  Jabber Function
          7. 6.5.1.3.7  Automatic Link Polarity Detection and Correction
          8. 6.5.1.3.8  Transmit and Receive Filtering
          9. 6.5.1.3.9  Transmitter
          10. 6.5.1.3.10 Receiver
    6. 6.6 Memory
      1. 6.6.1 Register Block
        1. 6.6.1.1 Register Definition
          1. 6.6.1.1.1 Basic Mode Control Register (BMCR)
          2. 6.6.1.1.2 Basic Mode Status Register (BMSR)
          3. 6.6.1.1.3 PHY Identifier Register #1 (PHYIDR1)
          4. 6.6.1.1.4 PHY Identifier Register #2 (PHYIDR2)
          5. 6.6.1.1.5 Auto-Negotiation Advertisement Register (ANAR)
          6. 6.6.1.1.6 Auto-Negotiation Link Partner Ability Register (ANLPAR) (BASE Page)
          7. 6.6.1.1.7 Auto-Negotiation Link Partner Ability Register (ANLPAR) (Next Page)
          8. 6.6.1.1.8 Auto-Negotiate Expansion Register (ANER)
          9. 6.6.1.1.9 Auto-Negotiation Next Page Transmit Register (ANNPTR)
        2. 6.6.1.2 Extended Registers
          1. 6.6.1.2.1  PHY Status Register (PHYSTS)
          2. 6.6.1.2.2  False Carrier Sense Counter Register (FCSCR)
          3. 6.6.1.2.3  Receiver Error Counter Register (RECR)
          4. 6.6.1.2.4  100 Mb/s PCS Configuration and Status Register (PCSR)
          5. 6.6.1.2.5  RMII and Bypass Register (RBR)
          6. 6.6.1.2.6  LED Direct Control Register (LEDCR)
          7. 6.6.1.2.7  PHY Control Register (PHYCR)
          8. 6.6.1.2.8  10BASE-T Status/Control Register (10BTSCR)
          9. 6.6.1.2.9  CD Test and BIST Extensions Register (CDCTRL1)
          10. 6.6.1.2.10 Energy Detect Control (EDCR)
  7. 7Application, Implementation, and Layout
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
        1. 7.2.1.1 TPI Network Circuit
        2. 7.2.1.2 Clock IN (X1) Recommendations
          1. 7.2.1.2.1 Oscillator
          2. 7.2.1.2.2 Crystal
        3. 7.2.1.3 Power Feedback Circuit
        4. 7.2.1.4 Magnetics
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 MAC Interface (MII/RMII)
          1. 7.2.2.1.1 Termination Requirement
          2. 7.2.2.1.2 Recommended Maximum Trace Length
        2. 7.2.2.2 Calculating Impedance
          1. 7.2.2.2.1 Microstrip Impedance - Single-Ended
          2. 7.2.2.2.2 Stripline Impedance - Single-Ended
          3. 7.2.2.2.3 Microstrip Impedance - Differential
          4. 7.2.2.2.4 Stripline Impedance - Differential
      3. 7.2.3 Application Curves
    3. 7.3 Layout
      1. 7.3.1 Layout Guidelines
        1. 7.3.1.1 PCB Layer Stacking
      2. 7.3.2 Layout Example
    4. 7.4 Power Supply Recommendations
  8. 8Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Related Links
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  9. 9Mechanical Packaging and Orderable Information

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订购信息

1 Device Overview

1.1 Features

  • Low-Power 3.3-V, 0.18-µm CMOS Technology
  • Auto-MDIX for 10/100 Mb/s
  • Energy Detection Mode
  • 3.3-V MAC Interface
  • RMII Rev. 1.2 Interface (configurable)
  • MII Interface
  • MII Serial Management Interface (MDC and MDIO)
  • IEEE 802.3 Auto-Negotiation and Parallel Detection
  • IEEE 802.3 ENDEC, 10BASE-T Transceivers and Filters
  • IEEE 802.3 PCS, 100BASE-TX Transceivers and Filters
  • Integrated ANSI X3.263 Compliant TP-PMD Physical Sub-Layer with Adaptive Equalization and Baseline Wander Compensation
  • Error-Free Operation Beyond 137 Meters
  • ESD Protection – Greater than 4 kV Human Body Model
  • Configurable LED for Link and Activity (DP83848J/K)
  • 25-MHz Clock Output (DP83848H/M/T)
  • Single Register Access for Complete PHY Status
  • 10/100 Mb/s Packet BIST (Built-in Self Test)

1.2 Applications

  • Peripheral Devices
  • Mobile Devices
  • Factory and Building Automation
  • Base Stations

1.3 Description

The DP83848x device addresses the quality, reliability and small form factor required for space sensitive applications in embedded systems.

The DP83848x offers performance far exceeding the IEEE specifications, with superior interoperability and industry leading performance beyond 137 meters of Cat-V cable. The DP83848x also offers Auto-MDIX to remove cabling complications. DP83848x has superior ESD protection, greater than 4 kV Human Body Model, providing extremely high reliability and robust operation, ensuring a high-level performance in all applications.

DP83848J/K offers two flexible LED indicators one for Link and the other for Speed. In addition, both MII and RMII are supported ensuring ease and flexibility of design.

The DP83848H/M/T incorporates a 25-MHz clock out that eliminates the need and hence the space and cost, of an additional clock source component.

The DP83848x is offered in small 6-mm × 6-mm WQFN 40-pin package and is ideal for industrial controls, building/factory automation, transportation, test equipment and wire-less base stations.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
DP83848x WQFN (40) 6.00 mm × 6.00 mm
(1) For more information, see Section 9, Mechanical Packaging and Orderable Information.

1.4 Functional Block Diagram

DP83848H DP83848J DP83848K DP83848M DP83848T DP83848_functional_block_diagram_snls250.gif