用户手册 — SMSC COM20020

目录

• FEATURES

  1
• GENERAL DESCRIPTION

  1
• PIN CONFIGURATION

  3
• DESCRIPTION OF PIN FUNCTIONS

  4
• PROTOCOL DESCRIPTION

  8
• NETWORK PROTOCOL

  8
• DATA RATES

  8
• NETWORK RECONFIGURATION

  8
• BROADCAST MESSAGES

  9
• EXTENDED TIMEOUT FUNCTION

  9
• LINE PROTOCOL

  10
• SYSTEM DESCRIPTION

  12
• MICROCONTROLLER INTERFACE

  12
• TRANSMISSION MEDIA INTERFACE

  15
• FUNCTIONAL DESCRIPTION

  19
• MICROSEQUENCER

  19
• INTERNAL REGISTERS

  22
• INTERNAL RAM

  32
• COMMAND CHAINING

  37
• INITIALIZATION SEQUENCE

  40
• IMPROVED DIAGNOSTICS

  40
• OPERATIONAL DESCRIPTION

  43
• MAXIMUM GUARANTEED RATINGS*

  43
• DC ELECTRICAL CHARACTERISTICS

  43
• TIMING DIAGRAMS

  46
• COM20020 ERRATA SHEET

  59