MSM6636/6636B User’s Manual
Contents
Contents – 1
Contents
1. OVERVIEW
1-1
1.1
Overview.....................................................................................................................................................1-1
1.2
Features .......................................................................................................................................................1-1
1.3
Pin Configuration ........................................................................................................................................1-2
1.4
Pin Description............................................................................................................................................1-3
1.5
Block Diagram ............................................................................................................................................1-4
2. COMMUNICATION FORMATS
2-1
2.1
Frame Format ..............................................................................................................................................2-1
2.2
PWM Bit Format.........................................................................................................................................2-4
3. INTERNAL REGISTER DETAILS
3-1
3.1
Transmit Register ........................................................................................................................................3-1
3.2
Response Register .......................................................................................................................................3-2
3.3
Transmit Status Register .............................................................................................................................3-2
3.4
Receive Register..........................................................................................................................................3-3
3.5
Receive Data Length Register.....................................................................................................................3-5
3.6
Initialization/Read Completion Indication Register ....................................................................................3-5
3.7
Interrupt Request Flag.................................................................................................................................3-5
3.8
Interrupt Enable Flag (IE) ...........................................................................................................................3-7
3.9
Sleep Command Register ............................................................................................................................3-7
3.10 Break Command Register ...........................................................................................................................3-8
3.11 Mode Setting Register.................................................................................................................................3-9
3.12 Physical Address Register .........................................................................................................................3-10
3.13 Functional Address Register .....................................................................................................................3-10
3.14 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 .....................................................................................................................................4-5
4.2
MSM6636B.................................................................................................................................................4-8
4.2.1
Parallel Interface....................................................................................................................................4-8
5. FUNCTION DETAILS
5-1
5.1
Arbitration Function....................................................................................................................................5-1
5.2
Address Filter Function...............................................................................................................................5-1
5.3
Automatic Retransmission Function ...........................................................................................................5-2
5.4
CPU Interrupt Function...............................................................................................................................5-3
5.5
Receive Message Length Error Detection Function....................................................................................5-3
5.6
Local-Station Bus Driver Abnormal Detection Function............................................................................5-3
5.7
Communication Check Function between Specific Nodes ........................................................................5-3
5.8
Communication Check Function between Multiple Nodes.........................................................................5-4
5.9
Break Function ............................................................................................................................................5-4
5.10 Fault Tolerant Function...............................................................................................................................5-5