Dear customers,
About the change in the name such as "Oki Electric Industry Co. Ltd." and
"OKI" in documents to OKI Semiconductor Co., Ltd.
The semiconductor business of Oki Electric Industry Co., Ltd. was succeeded to OKI
Semiconductor Co., Ltd. on October 1, 2008.
Therefore, please accept that although
the terms and marks of "Oki Electric Industry Co., Ltd.", “Oki Electric”, and "OKI"
remain in the documents, they all have been changed to "OKI Semiconductor Co., Ltd.".
It is a change of the company name, the company trademark, and the logo, etc. , and
NOT a content change in documents.
October 1, 2008
OKI Semiconductor Co., Ltd.
550-1 Higashiasakawa-cho, Hachioji-shi, Tokyo 193-8550, Japan
http://www.okisemi.com/en/
FEUL6636B-05
1
MSM6636/6636B
User’s Manual
SAE-J1850 Communication Protocol Conformed
Transmission Controller for
Automotive LAN
Oki Electric Industry Co., Ltd.
5th EDITION
ISSUE DATE: August 2001
NOTICE
1.
The information contained herein can change without notice owing to product and/or technical improvements.
Before using the product, please make sure that the information being referred to is up-to-date.
The outline of action and examples for application circuits described herein have been chosen as an explanation for
the standard action and performance of the product. When planning to use the product, please ensure that the
external conditions are reflected in the actual circuit, assembly, and program designs.
When designing your product, please use our product below the specified maximum ratings and within the specified
operating ranges including, but not limited to, operating voltage, power dissipation, and operating temperature.
Oki assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting
from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or
electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or
operation outside the specified operating range.
Neither indemnity against nor license of a third party’s industrial and intellectual property right, etc. is granted by us
in connection with the use of the product and/or the information and drawings contained herein. No responsibility is
assumed by us for any infringement of a third party’s right which may result from the use thereof.
The products listed in this document are intended for use in general electronics equipment for commercial
applications (e.g., office automation, communication equipment, measurement equipment, consumer electronics,
etc.). These products are not authorized for use in any system or application that requires special or enhanced quality
and reliability characteristics nor in any system or application where the failure of such system or application may
result in the loss or damage of property, or death or injury to humans.
Such applications include, but are not limited to, traffic and automotive equipment, safety devices, aerospace
equipment, nuclear power control, medical equipment, and life-support systems.
Certain products in this document may need government approval before they can be exported to particular countries.
The purchaser assumes the responsibility of determining the legality of export of these products and will take
appropriate and necessary steps at their own expense for these.
No part of the contents contained herein may be reprinted or reproduced without our prior permission.
Copyright 2001 Oki Electric Industry Co., Ltd.
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MSM6636/6636B User’s Manual
Contents
Contents
1. OVERVIEW
1.1
1.2
1.3
1.4
1.5
1-1
Overview..................................................................................................................................................... 1-1
Features....................................................................................................................................................... 1-1
Pin Configuration........................................................................................................................................ 1-2
Pin Description ........................................................................................................................................... 1-3
Block Diagram............................................................................................................................................ 1-4
2. COMMUNICATION FORMATS
2.1
2.2
2-1
Frame Format.............................................................................................................................................. 2-1
PWM Bit Format ........................................................................................................................................ 2-4
3. INTERNAL REGISTER DETAILS
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
3.13
3.14
3-1
Transmit Register........................................................................................................................................ 3-1
Response Register....................................................................................................................................... 3-2
Transmit Status Register ............................................................................................................................. 3-2
Receive Register ......................................................................................................................................... 3-3
Receive Data Length Register..................................................................................................................... 3-5
Initialization/Read Completion Indication Register.................................................................................... 3-5
Interrupt Request Flag................................................................................................................................. 3-5
Interrupt Enable Flag (IE)........................................................................................................................... 3-7
Sleep Command Register............................................................................................................................ 3-7
Break Command Register ........................................................................................................................... 3-8
Mode Setting Register................................................................................................................................. 3-9
Physical Address Register......................................................................................................................... 3-10
Functional Address Register ..................................................................................................................... 3-10
NAK Register ........................................................................................................................................... 3-11
4. CPU INTERFACES
4-1
4.1 MSM6636 ................................................................................................................................................... 4-1
4.1.1 Clock Synchronous Serial Interface ...................................................................................................... 4-2
4.1.2 UART Interface (Start-Stop Synchronization System) ......................................................................... 4-5
4.2 MSM6636B ................................................................................................................................................ 4-8
4.2.1 Parallel Interface ................................................................................................................................... 4-8
5. FUNCTION DETAILS
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5-1
Arbitration Function ................................................................................................................................... 5-1
Address Filter Function............................................................................................................................... 5-1
Automatic Retransmission Function........................................................................................................... 5-2
CPU Interrupt Function............................................................................................................................... 5-3
Receive Message Length Error Detection Function ................................................................................... 5-3
Local-Station Bus Driver Abnormal Detection Function............................................................................ 5-3
Communication Check Function between Specific Nodes ........................................................................ 5-3
Communication Check Function between Multiple Nodes ........................................................................ 5-4
Break Function............................................................................................................................................ 5-4
Fault Tolerant Function............................................................................................................................... 5-5
Contents – 1
MSM6636/6636B User’s Manual
Contents
6. APPLICATION EXAMPLE
6.1
6.2
6-1
Host CPU and J1850 Line Connection Example ........................................................................................ 6-1
Initialization Routine Example .................................................................................................................. 6-3
7. ELECTRICAL CHARACTERISTICS
7-1
7.1 Absolute Maximum Ratings ....................................................................................................................... 7-1
7.2 Operation Range ......................................................................................................................................... 7-3
7.3 DC Characteristics ...................................................................................................................................... 7-3
7.4 AC Characteristics ..................................................................................................................................... 7-5
7.4.1 PWM Bit Timing................................................................................................................................... 7-5
7.4.2 CPU Interface Timing ........................................................................................................................... 7-6
7.4.3 Wakeup Input Signal........................................................................................................................... 7-11
7.4.4 Fault Tolerant Function Operation Conditions.................................................................................... 7-12
7.4.5 Reset Input Pulse Width...................................................................................................................... 7-13
8. BUS MONITOR FUNCTION
8-1
9. PACKAGE OUTLINES AND DIMENSIONS
9-1
Contents – 2
