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Disclaimer
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especially disclaims any implied warranties of merchantability or fitness for any particular purpose. Further, OPTi Inc. reserves
the right to revise the design and associated documentation and to make changes from time to time in the content without
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OPTi Inc.
1440 McCarthy Blvd.
Milpitas, CA 95035
Tel: (408) 486-8000
Fax: (408) 486-8001
WWW: http://www.opti.com
®
FireLink 1394 OHCI
82C881
T
ABLE OF
C
ONTENTS
1.0
2.0
3.0
3.1
3.2
3.3
FEATURES ......................................................................................................................................................................1
SIGNAL DEFINITIONS ....................................................................................................................................................3
PCI Bus Interface Signals.....................................................................................................................................7
PHY-Link Interface Signal Set ..............................................................................................................................9
DMA Control Block .............................................................................................................................................13
Serial EEPROM Interface...................................................................................................................................13
Link Block ...........................................................................................................................................................15
Read Operations from the Serial EEPROM........................................................................................................16
Write operations to the Serial EEPROM.............................................................................................................16
Related PCICFG Registers ................................................................................................................................17
Serial EEPROM MAP .........................................................................................................................................18
TEST MODES ............................................................................................................................................................... 33
Important User Defined Values.......................................................................................................................... 37
Current Default Configuration Values ................................................................................................................ 37
Direct Read of Internal Signals .......................................................................................................................... 42
10.2.1
10.2.2
10.2.3
®
912-2000-031
Revision: 1.0
Page ii
®
FireLink 1394 OHCI
82C881
•
Supports asynchronous and isochronous transfers at
100, 200 and 400 Mbps
Implements a fully Bus Manager Capable node
including an Isochronous Resource Manager
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
Supports posting of physical write request packets
Complies with the PCI Power Management
specification rev. 1.1, supporting ACPI states D0 and
D3
hot
and PME# generation
Incorporates CLKRUN# support
Implements comprehensive Debug Registers
Implements physical upper bound register.
1.0 Features
The OPTi 82C881 1394 OHCI Link Controller is a PCI-
based host controller with the following features.
•
•
•
•
•
•
•
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
Implements IEEE1212-based control and status
registers that can be mapped to both I/O and memory
space
Incorporates independent DMA controllers
isochronous and asynchronous operations
for
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
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
Incorporates two
EEPROM interface
wire
industry-standard
Serial
2.0 Overview
This document describes the OPTi FireLink 1394 OHCI
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