Oki MSM9225B, User Manual

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MSM9225B User’s Manual
Contents
Contents – 1
Table of Contents
Chapter 1 Overview
1.1 Overview..................................................................................................................................................... 1-1
1.2 Features....................................................................................................................................................... 1-1
1.3 Block Diagram............................................................................................................................................ 1-2
1.4 Configuration Example............................................................................................................................... 1-2
1.5 Pin Configuration........................................................................................................................................ 1-3
1.6 Pin Descriptions .......................................................................................................................................... 1-4
Chapter 2 Register Descriptions
2.1 Memory Space ............................................................................................................................................ 2-1
2.2 Message Memory........................................................................................................................................ 2-3
2.3 Message Memory Related Register ............................................................................................................ 2-4
2.3.1 Message Control Register (MCR: x0hex) ............................................................................................. 2-4
2.3.2 Identifier 0 (IDR0: x1hex)..................................................................................................................... 2-7
2.3.3 Identifier 1 (IDR1: x2hex)..................................................................................................................... 2-8
2.3.4 Identifiers 2, 3, 4/Messages 0-7 (MSG0-7 in the case of standard format;
IDR2-4, TMSG0-7 in the case of extended format: x3 to xDhex) ........................................................ 2-8
2.4 Control Registers ...................................................................................................................................... 2-16
2.4.1 CAN Control Register (CANC: 0Ehex) .............................................................................................. 2-17
2.4.2 CAN Interrupt Control Register (CANI: 0Fhex)................................................................................. 2-19
2.4.3 Message Box Count Setting Register (NMES: 1Ehex) ....................................................................... 2-21
2.4.4 CAN Bus Timing Register 0 (BTR0: 1Fhex)...................................................................................... 2-21
2.4.5 CAN Bus Timing Register 1 (BTR1: 2Ehex) ..................................................................................... 2-23
2.4.6 Communication Input/Output Control Register (TIOC: 2Fhex) ......................................................... 2-27
2.4.7 Group Message Register (GMR0: 3Ehex, GMR1: 3Fhex) ................................................................. 2-30
2.4.8 Group Message Mask Register (GMSK) ............................................................................................ 2-31
2.4.9 Standby Control Register (STBY: 8Ehex) .......................................................................................... 2-33
2.4.10 CAN Control Register 2 (CANC2: 8Fhex) ......................................................................................... 2-34
2.4.11 Communication Message Box Number Register (TMN: 9Ehex)........................................................ 2-35
2.4.12 CAN Status Register (CANS: 9Fhex) ................................................................................................. 2-36
2.4.13 Transmit Error Counter (TEC: AEhex)............................................................................................... 2-37
2.4.14 Receive Error Counter (REC: AFhex) ................................................................................................ 2-37
2.4.15 CAN Status Register 2 (CANS2: BEhex) ........................................................................................... 2-38
2.4.16 Bus Off Release Counter (BOCO: BFhex) ......................................................................................... 2-39
Chapter 3 Operational Description
3.1 Operational Procedure ................................................................................................................................ 3-1
3.1.1 Initial Setting......................................................................................................................................... 3-1
3.1.2 Transmit Procedure ............................................................................................................................... 3-2
3.1.3 Receive Procedure................................................................................................................................. 3-3
3.1.4 Message Box Rewrites during Operation.............................................................................................. 3-4
3.1.5 Remote Frame Operation ...................................................................................................................... 3-5
3.1.5.1 Automatic Response ........................................................................................................................ 3-5
3.1.5.2 Manual Response............................................................................................................................. 3-7
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