net2890 ETC-unknow, net2890 Datasheet - Page 7

• Manufacturer Part Number: net2890
• Description: Interface Controller
• Manufacturer: ETC-unknow

Specification
1. Highlights
1.1 Features
1.2 Overview
The NET2890 USB Interface Controller allows control, isochronous, bulk and interrupt transfers
between a generic local bus and a Universal Serial Bus (USB). The NET2890 supports the
connection between a host computer and an intelligent peripheral such as a digital camera or
scanner.
The five main components of the NET2890 are the USB Bus Interface, the Local Bus Interface,
the Configuration Registers, the five endpoint FIFOs, and the Serial Interface Engine.
The USB Interface is responsible for the following functions:
The Local Bus Interface is responsible for the following functions:
____________________________________________________________________________________
USB Specification Version 1.1 Compliant
Bridges between a Processor-Independent local bus and a USB bus
USB device bandwidth of up to 12Mb/sec
Four Configurable Endpoints, in addition to Endpoint 0
Each endpoint can be Isochronous, Bulk, or Interrupt, as well as In or Out
One 128 byte FIFO attached to each endpoint allows concurrency
Separate 16 byte FIFO for Control Endpoint 0
Supports local CPU or DMA data transfers
Automatic retry of failed packets
Diagnostic register allows forced USB errors
Atomic operation to set and clear status bits simplifies software
Simulated disconnect allows re-enumeration
Low power CMOS in 48 Pin Plastic QFP Package
3.3V operating voltage, 3.3V / 5.0 V dual-voltage I/O interface
Pin compatible with NET2888
Host to device Communication.
USB bit level protocol (Serial Interface Engine).
Automatic retry of failed packets.
Up to four Isochronous, Bulk, or Interrupt endpoints, each with a 128 byte FIFO.
Configurable Control Endpoint 0 with a 16 byte FIFO.
Interface to FIFOs and Local bus controller.
Simulated disconnect signaling
FIFO Control.
Local CPU interface.
Local DMA controller interface.
Interrupts.
335 Pioneer Way, Mountain View, California 94041
TEL [phone] FAX [phone]
NetChip Technology, Inc., 1999
Rev 2.0, Draft 9, July 16, 1999
http://www.netchip.com
NET2890 USB Interface Controller
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