IA82527
Data Sheet
CAN Serial Communications Controller
December 20, 2012
1.
Introduction
The Innovasic Semiconductor IA82527 Controller Area Network (CAN) Serial Communications
Controller is a form, fit, and function replacement for the original Intel® 82527 Serial
Communications Controller.
These devices are produced using Innovasic’s Managed IC Lifetime Extension System
(MILES™). This cloning technology, which produces replacement ICs beyond simple
emulations, ensures complete compatibility with the original device, including any
“undocumented features.” Additionally, MILES™ captures the clone design in such a way that
production of the clone can continue even as silicon technology advances.
The IA82527 Serial Communications Controller replaces the obsolete Intel 82527 device,
allowing users to retain existing board designs, software compilers/assemblers, and emulation
tools, thereby avoiding expensive redesign efforts.
1.1
General Description
CAN protocol uses a multi-master CSMA/CR (Carrier Sense, Multiple Access with Collision
Resolution) bus to transfer message objects between network nodes.
The IA82527 support CAN Specification 2.0 Part A and B, standard and extended message
frames, and has the capability to transmit, receive, and perform message filtering on standard and
extended message frames.
The IA82527 can store 15 message objects of 8-byte data length. Each message object can be
configured as either transmit or receive except for message object 15, which is receive-only.
Message object 15 also provides a special acceptance mask designed to filter message identifiers
that are received.
The IA82527 also provides a programmable acceptance mask that allows users to globally mask
any identifier bits of the incoming message. This global mask can be used for both standard and
extended message frames.
The IA82527 is capable of operating at 5.0 or 3.3 volts. This datasheet discusses both modes of
operation. Where applicable, characteristics specific to either 3.3 or 5.0 volt operation are
identified separately throughout this datasheet.
The IA82527 is manufactured in a reliable 5-volt process technology and is available in 44-lead
PLCC or PQFP RoHS packages for the automotive temperature range (-40°C to 125°C).
IA211080504-07
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