|
82C881 Datasheet, PDF (5/46 Pages) List of Unclassifed Manufacturers – FireLink 1394 OHCI Link Controller | |||
|
◁ |
FireLink 1394 OHCI
®
82C881
1.0 Features
⢠Supports asynchronous and isochronous transfers at
100, 200 and 400 Mbps
The OPTi 82C881 1394 OHCI Link Controller is a PCI-
based host controller with the following features.
⢠Implements a fully Bus Manager Capable node
including an Isochronous Resource Manager
⢠Compliant with PCI Local Bus Specification 2.1
⢠Compliant with P1394a Draft 2.0 Standard for a High-
performance Serial Bus
⢠Interfaces to 33MHz, 32-bit PCI bus
⢠PnP (Plug and Play) compatible per PCI Local Bus
Specification rev. 2.1
⢠Interfaces to PHYs that conform to the Link-PHY
interface described in Chapter 5 of the P1394a Draft
2.0 specification
⢠Interfaces to 1394-1995 compliant PHYs
⢠Offers selective disabling of 1394a features
(controllable by software) for interfacing to a partially
P1394a compliant PHY
⢠Implements IEEE1212-based control and status
registers that can be mapped to both I/O and memory
space
⢠Incorporates independent DMA controllers for
isochronous and asynchronous operations
⢠Supports four isochronous transmit and isochronous
receive contexts
⢠Supports burst transactions on the PCI bus interface
⢠Offers direct access to the physical address space of
the host
⢠Assigns priority for DMA per 1394 OHCI specification
1.00
⢠Supports four transmit and three receive configurable
FIFOs
⢠Offers both packet per-buffer and buffer-fill modes of
operation for the isochronous receive context
⢠Supports posting of physical write request packets
⢠Complies with the PCI Power Management
specification rev. 1.1, supporting ACPI states D0 and
D3hot and PME# generation
⢠Incorporates CLKRUN# support
⢠Implements comprehensive Debug Registers
⢠Implements physical upper bound register.
2.0 Overview
This document describes the OPTi FireLink 1394 OHCI
Link Controller (82C881). It details:
⢠Signal Definitions
⢠Strap Selectable Options
⢠Functionality
⢠Register Descriptions.
⢠Incorporates two wire industry-standard Serial
EEPROM interface
⢠Functions as a 1394 cycle master
FireLink 1394 System Block Diagram
1394
Port
FireLink
TriFire
82C881
1394
82C842
PHY
1394
Port
1394
Port
912-2000-031
Revision: 1.0
Page 1
|
▷ |