CS8900A-CQ3Z Cirrus Logic

CS8900A Product Data Sheet FEATURES Crystal LAN Ethernet Single-Chip IEEE 802.3 Ethernet Controller with Controller Direct ISA-Bus Interface Maximum Current Consumption = 55 mA (5V DESCRIPTION Supply) The CS8900A is a low-cost Ethernet LAN Controller op- 3V or 5V Operation timized for the Industry Standard Architecture (ISA) bus Industrial Temperature Range and general purpose microcontroller busses. Its highly- Comprehensive Suite of Software Drivers integrated design eliminates the need for costly external Available components required by other Ethernet controllers. The CS8900A includes on-chip RAM, 10BASE-T transmit Efficient PacketPage Architecture Operates in I/O and Memory Space, and as DMA Slave and receive filters, and a direct ISA-Bus interface with 24 mA Drivers. Full Duplex Operation In addition to high integration, the CS8900A offers a On-Chip RAM Buffers Transmit and Receive Frames broad range of performance features and configura- tionoptions. Its unique PacketPage architecture 10BASE-T Port with Analog Filters, Provides: automatically adapts to changing network traffic pat- - Automatic Polarity Detection and Correction terns and available system resources. The result is AUI Port for 10BASE2, 10BASE5 and 10BASE-F increased system efficiency. Programmable Transmit Features: The CS8900A is available in a 100-pin LQFP package - Automatic Re-transmission on Collision ideally suited for small form-factor, cost-sensitive Ether- - Automatic Padding and CRC Generation net applications. With the CS8900A, system engineers can design a complete Ethernet circuit that occupies Programmable Receive Features: less than 1.5 square inches (10 sq. cm) of board space. - Stream Transfer for Reduced CPU Overhead - Auto-Switch Between DMA and On-Chip Memory ORDERING INFORMATION - Early Interrupts for Frame Pre-Processing - Automatic Rejection of Erroneous Packets CS8900A-CQZ 0 to 70 C 5V LQFP-100 Lead free CS8900A-IQZ -40 to 85 C 5V LQFP-100 Lead free EEPROM Support for Jumperless Configuration CS8900A-CQ3Z 0 to 70 C 3.3V LQFP-100 Lead free Boot PROM Support for Diskless Systems CS8900A-IQ3Z -40 to 85 C 3.3V LQFP-100 Lead free Boundary Scan and Loopback Test LED Drivers for Link Status and LAN Activity Standby and Suspend Sleep Modes 20 MHz EEPROM XTAL CS8900A ISA Ethernet Controller LED Clock 10BASE-T Control RX Filters & EEPROM RAM Receiver Control RJ-45 10BASE-T 10BASE-T TX Filters & Encoder/ Transmitter Host Decoder Bus & Logic PLL AUI Transmitter Attachment Unit 802.3 AUI Memory Interface Collision MAC Boundary Manager (AUI) Engine Power AUI Scan Manager Test Logic Receiver DS271F6 JUN 15 Copyright Cirrus Logic, Inc. 1997-2015 (All Rights Reserved) Host BusCS8900A Crystal LAN Ethernet Controller TABLE OF CONTENTS 1.0 INTRODUCTION ......................................................................................................................8 1.1 General Description ...........................................................................................................8 1.1.1 Direct ISA-Bus Interface .......................................................................................8 1.1.2 Integrated Memory ...............................................................................................8 1.1.3 802.3 Ethernet MAC Engine .................................................................................8 1.1.4 EEPROM Interface ...............................................................................................8 1.1.5 Complete Analog Front End .................................................................................8 1.2 System Applications ..........................................................................................................8 1.2.1 Motherboard LANs ...............................................................................................8 1.2.2 Ethernet Adapter Cards ........................................................................................9 1.3 Key Features and Benefits ..............................................................................................10 1.3.1 Very Low Cost ....................................................................................................10 1.3.2 High Performance ...............................................................................................10 1.3.3 Low Power and Low Noise .................................................................................10 1.3.4 Complete Support ...............................................................................................10 2.0 PIN DESCRIPTION .............................................................................................................12 3.0 FUNCTIONAL DESCRIPTION...............................................................................................17 3.1 Overview .........................................................................................................................17 3.1.1 Configuration ......................................................................................................17 3.1.2 Packet Transmission ..........................................................................................17 3.1.3 Packet Reception ...............................................................................................17 3.2 ISA Bus Interface ............................................................................................................18 3.2.1 Memory Mode Operation ....................................................................................18 3.2.2 I/O Mode Operation ............................................................................................18 3.2.3 Interrupt Request Signals ...................................................................................18 3.2.4 DMA Signals .......................................................................................................18 3.3 Reset and Initialization ....................................................................................................19 3.3.1 Reset ..................................................................................................................19 3.3.1.1 External Reset, or ISA Reset ...............................................................19 3.3.1.2 Power-Up Reset ..................................................................................19 3.3.1.3 Power-Down Reset ..............................................................................19 3.3.1.4 EEPROM Reset ...................................................................................19 3.3.1.5 Software Initiated Reset .......................................................................19 3.3.1.6 Hardware (HW) Standby or Suspend ..................................................19 3.3.1.7 Software (SW) Suspend ......................................................................19 3.3.2 Allowing Time for Reset Operation .....................................................................20 3.3.3 Bus Reset Considerations ..................................................................................20 3.3.4 Initialization .........................................................................................................20 3.4 Configurations with EEPROM .........................................................................................21 3.4.1 EEPROM Interface .............................................................................................21 3.4.2 EEPROM Memory Organization .........................................................................21 3.4.3 Reset Configuration Block ..................................................................................21 3.4.3.1 Reset Configuration Block Structure ....................................................22 3.4.3.2 Reset Configuration Block Header ......................................................22 3.4.3.3 Determining the EEPROM Type ..........................................................23 3.4.3.4 Checking EEPROM for presence of Reset Configuration Block ..........23 3.4.3.5 Determining Number of Bytes in the Reset Configuration Block .........23 3.4.4 Groups of Configuration Data .............................................................................23 3.4.4.1 Group Header ......................................................................................23 3.4.5 Reset Configuration Block Checksum ................................................................24 3.4.6 EEPROM Example .............................................................................................24 3.4.7 EEPROM Read-out ............................................................................................24 CIRRUS LOGIC PRODUCT DATASHEET 2 DS271F6