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CHAPTER 20 LIN-UART
20.6.1 Setting the Baud Rate
This section describes how the baud rates are set and the resulting serial clock
frequency is calculated.
■ Calculating the Baud Rate
The both 15-bit reload counters are programmed by the baud rate generator registers 1, 0 (BGR1/BGR0).
The following calculation formula should be used to set the desired baud rate:
Reload Value:
v = [Φ / b] - 1,
where Φ is the machine clock, b the baud rate and [] gaussian brackets (mathematical rounding function).
●
Example of calculation
If the machine clock is 16 MHz and the desired baud rate is 19200 bps baud then the reload value v is:
v = [16*10
6
/ 19200] - 1 = 832
The exact baud rate can then be recalculated: b
exact
= Φ / (v + 1), here it is: 16*10
6
/ 833 = 19207.6831
Note:
Setting the reload value to 0 stops the reload counter. For this reason the minimum division ratio is 2.
For asynchronous communication, the reload value must be greater than equal to 4 because 5 times
over-sampling is performed to determine the reception value internally.
- MB90360 Series 1
- HARDWARE MANUAL 1
- CONTENTS 9
- CHAPTER 1 17
- OVERVIEW 17
- 1.1 Overview of MB90360 18
- ■ Product overview 21
- ■ Features 23
- CHAPTER 1 OVERVIEW 25
- 1.3 Package Dimensions 28
- 1.4 Pin Assignment 29
- 1.5 Pin Functions 30
- 1.6 Input-Output Circuits 33
- CMOS input 36
- Automotive input 36
- Standby control fo 36
- 1.7 Handling Device 37
- X0 (X0A) 38
- X1 (X1A) 38
- CHAPTER 2 43
- 2.1 Outline of the CPU 44
- 2.2 Memory Space 45
- ■ Address generation types 47
- 2.3 Memory Map 48
- 2.4 Linear Addressing 49
- 2.5 Bank Addressing Types 50
- 2.7 Registers 53
- H RP x 10H 55
- 2.7.1 Accumulator (A) 56
- 2.7.3 Processor Status (PS) 58
- B4 B3 B2 B1 B0 : RP 59
- Initial value 0 0 0 0 0 59
- ILM2 ILM1 ILM0 : ILM 60
- Initial value 0 0 0 60
- 2.7.4 Program Counter (PC) 61
- 2.8 Register Bank 62
- DTB register 63
- DPR register 63
- 24-bit physical address 63
- 2.9 Prefix Codes 64
- CHAPTER 2 CPU 66
- MOV ILM,#imm8 66
- • • • • • • • • 67
- • • • • •• • • • • 67
- Instructions 68
- CHAPTER 3 71
- PS I ILM 72
- MC-16LX CPU 72
- ■ Software Interrupts 73
- ■ Exceptions 74
- 3.2 Interrupt Vector 75
- 3.4 Interrupt Flow 81
- CHAPTER 3 INTERRUPTS 82
- 3.5 Hardware Interrupts 83
- MC-16LX bus 85
- 3.5.3 Multiple interrupts 87
- 3.6 Software Interrupts 88
- ■ Others 89
- ■ Structure 91
- (Undefined 93
- when reset) 93
- Intelligent I/O Service (EI 95
- 3.9 Exceptions 98
- CHAPTER 4 99
- DELAYED INTERRUPT 99
- GENERATION MODULE 99
- − : Undefined 101
- S Interrupt 101
- :Undefined 102
- Address: 00009F 102
- R/W : Read/Write R/W 103
- : Reset value 103
- Interrupt 104
- CHAPTER 5 107
- 5.1 Clocks 108
- ■ Clock Supply Map 110
- CHAPTER 5 CLOCKS 111
- PLL clock multiplier 114
- 5.5 Clock Mode 119
- ■ Machine Clock 120
- Microcontroller 124
- CHAPTER 6 125
- CLOCK SUPERVISOR 125
- CHAPTER 6 CLOCK SUPERVISOR 127
- Reserved 129
- ■ Sub-clock Mode 132
- ■ Stop Mode 132
- CHAPTER 7 135
- 7.1 Resets 136
- Synchronization 141
- 7.4 Reset Operation 142
- ■ Mode Fetch 143
- 7.5 Reset Cause Bits 144
- R : Read only 145
- W : Write only 145
- X : Undefined 145
- 7.6 Status of Pins in a Reset 148
- CHAPTER 8 149
- LOW-POWER 149
- CONSUMPTION MODE 149
- Watch timer 153
- Timebase timer 153
- To watchdog timer 153
- 00011000B 155
- : Read/WriteR/W 155
- : Write onlyW 155
- 1-instruction 158
- 8.5 Standby Mode 159
- 8.5.1 Sleep Mode 161
- ■ Return from Sleep Mode 162
- 8.5.2 Watch Mode 164
- 8.5.3 Timebase Timer Mode 166
- 8.5.4 Stop Mode 168
- ■ Return from Stop Mode 169
- 8.6 Status Change Diagram 171
- ■ Clock Mode Switching 174
- Enter the Standby Mode 174
- CHAPTER 9 177
- MEMORY ACCESS MODES 177
- 9.1.1 Mode Pins 179
- 9.1.2 Mode Data 180
- General 181
- ■ Recommended Setting 182
- CHAPTER 10 183
- I/O PORTS 183
- 10.1 I/O Ports 184
- 10.2 I/O Port Registers 185
- CHAPTER 10 I/O PORTS 186
- 76543210 190
- R/W: Read/Write 191
- ILSR1 : 00000FH 192
- ILSR0 : 00000EH 192
- ■ Initial value of ILSR 193
- CHAPTER 11 195
- TIMEBASE TIMER 195
- ■ Clock Supply 197
- : Undefined 200
- 1XX00100B 201
- CHAPTER 11 TIMEBASE TIMER 205
- ■ Supply of Operation Clock 207
- CHAPTER 12 211
- WATCHDOG TIMER 211
- ■ Functions of Watchdog Timer 212
- CHAPTER 12 WATCHDOG TIMER 215
- Start up 215
- 12.3 Watchdog Timer Registers 217
- CHAPTER 13 225
- 16-Bit I/O TIMER 225
- CHAPTER 13 16-Bit I/O TIMER 230
- ■ Pins of 16-bit I/O Timer 232
- 00000000B 234
- R/WR/WR/WR/WR/WR/W R/WR/W 234
- Reset value 239
- IEI0IEI1ICUS0ICUS1 240
- IEI2IEI3 240
- XXX0X0XXB 240
- XXXXXXXXB 240
- OS Function 244
- ■ Correspondence to EI 244
- ". The counter 245
- ICPnICPm 247
- CHAPTER 14 253
- 16-BIT RELOAD TIMER 253
- ■ Operation at Underflow 255
- Prescaler 256
- Output signal 256
- ■ Pins of 16-bit Reload Timer 258
- (TMCSR:L) 261
- 00000000 263
- XXXXXXXX 265
- Counter clock 272
- Data load signal 272
- 2T to 2.5T 273
- Reload data 274
- ■ Setting of Event Count Mode 275
- CHAPTER 15 283
- WATCH TIMER 283
- 15.1 Overview of Watch Timer 284
- ■ Cycle of Clock Supply 285
- Address: 0000AA 288
- 45321067 289
- R/WR/WR/WR/W R/WR/WRR/W 289
- CHAPTER 15 WATCH TIMER 290
- 15.4 Watch Timer Interrupt 291
- : Used bit 292
- : Unused bit 292
- CHAPTER 16 297
- 8-/16-BIT PPG TIMER 297
- PPGCD: REV 301
- PPGEF: REV 301
- (Low level 302
- (High level side) 304
- (Low level side) 304
- ■ Pins of 8-/16-bit PPG Timer 306
- PEN0 PE0 PIE0 PUF0 308
- PEN1 PE1 PIE1 310
- PUF1 MD1 MD0 310
- T × (L + 1) 316
- T × (H + 1) 316
- T × (L0 + 1) × (L1+ 1) 325
- + 1) × (H1 + 1) 325
- T × (L0 + 1) T × (H0 + 1) 325
- Note: n = C, E 328
- CHAPTER 17 329
- DTP/EXTERNAL 329
- INTERRUPTS 329
- : Read/Write 337
- INT9R INT8R 341
- MOD2 MOD1 343
- RELDMOD0 OUTE OUTL 343
- Peripheral data 346
- Processing and interrupt 346
- ■ External Interrupt Function 347
- 17.4.2 DTP Function 348
- CHAPTER 18 355
- 8-/10-BIT A/D CONVERTER 355
- A/D data 357
- Comparator 357
- Figure 18.5-1 376
- Figure 18.5-2 378
- 18.5.3 Pause-conversion Mode 380
- 18.5.4 Conversion Using EI 382
- CHAPTER 19 387
- LOW VOLTAGE DETECTION/ 387
- CPU OPERATING 387
- DETECTION RESET 387
- 4.0V ± 0.3V 388
- Detection voltage 388
- C (approx.262ms) 389
- Reset Circuit 390
- Register 392
- R/W:Read Write 392
- :Initial value 392
- CHAPTER 20 397
- LIN-UART 397
- 20.1 Overview of LIN-UART 398
- ■ LIN-UART operation modes 400
- ■ LIN-UART interrupt and EI 401
- ■ Block Diagram of LIN-UART 403
- 20.3 LIN-UART Pins 407
- 20.4 LIN-UART Registers 408
- CHAPTER 20 LIN-UART 409
- SR0:000023 413
- SR1:00002B 413
- D0D1D2D3D4D5D6D7 415
- Initial value 421
- R/W : Read/Write 421
- 20.5 LIN-UART Interrupts 422
- (RDRF = "1") 425
- 20.6 LIN-UART Baud Rates 429
- 20.6.1 Setting the Baud Rate 431
- ■ Using external clock 433
- ■ Counting Example 433
- 20.7 Operation of LIN-UART 436
- ■ Inter-CPU Connection Method 437
- ■ Synchronization Methods 437
- ■ Signal Mode 437
- ■ Operation Enable Bit 437
- ST : Start bit 439
- SP : Stop mode 439
- P: Parity bit 439
- AD : Address/data bit 439
- (ECCR:SSM=1,SCR:PEN=0) 442
- LIN bus timing 447
- ■ LIN-UART Direct Pin Access 448
- Data transmission 450
- SCRn, SMRn 451
- SSRn, TDRn/RDRn 451
- ESCRn, ECCRn 451
- LBL1 LBL0 454
- (Operation Mode 3) 455
- 20.8 Notes on Using LIN-UART 457
- CHAPTER 21 459
- CAN CONTROLLER 459
- ■ Features of CAN Controller 460
- CSR1 (High) 469
- • Function control by writing 470
- CHAPTER 21 CAN CONTROLLER 474
- ■ Register Configuration 477
- ■ Register Function 477
- ■ Prescaler Settings 479
- 21.4.10 IDE Register (IDER) 482
- 21.4.23 Message Buffers 497
- CAN bus 506
- ■ Acceptance Filtering 506
- ■ Storing Received Message 506
- ■ Receive Overrun 507
- ■ Completing Reception 508
- To set the F 511
- Address: 518
- ■ Setting of CAN Direct Mode 520
- CHAPTER 22 521
- ADDRESS MATCH 521
- DETECTION FUNCTION 521
- AD1EAD2E AD0E 523
- AD4EAD5E AD3E 523
- Function 532
- ■ System Configuration and E 533
- PROM Memory Map 533
- ■ Setting and Operating State 535
- CHAPTER 23 541
- ROM MIRRORING MODULE 541
- Internal data bus 542
- : Undefined 543
- XXXXXXX1B 544
- 1213 11 10 9 8 544
- CHAPTER 24 545
- 512K-BIT FLASH MEMORY 545
- RDYINT WE RDY 546
- MB90F362/T(S) 548
- MB90F367/T(S) 548
- 24.3 Write/Erase Modes 549
- Automatic algorithm 553
- RDYINT bit 553
- 1 Machine cycle 553
- ■ Command Sequence Table 554
- ■ Data Polling Flag (DQ7) 557
- 24.6.2 Toggle Bit Flag (DQ6) 558
- 24.7.2 Writing Data 562
- 24.9 Flash Security Feature 567
- CHAPTER 25 569
- Supply Used) 573
- Supplied from Programmer) 575
- Write control pin 576
- Figure 25.4-1 577
- CHAPTER 26 581
- ROM SECURITY FUNCTION 581
- APPENDIX 583
- APPENDIX A I/O Maps 584
- Abbreviation 586
- APPENDIX B Instructions 592
- B.1 Instruction Types 593
- B.2 Addressing 594
- ■ Effective Address Field 595
- ■ Direct Addressing 596
- Memory space 597
- specified in an operand.) 601
- Before execution 603
- After execution 603
- : Highest bitMSB 605
- : Lowest bitLSB 605
- B.5 Execution Cycle Count 609
- B.6 Effective address field 612
- MC-16LX Instruction List 616
- APPENDIX B Instructions 617
- B.9 Instruction Map 630
- Table B.9-2 Basic Page Map 632
- ■ Data Read by Read Access 652
- 3rd bus cycle 654
- Data polling 654
- • The address is FxAAAA 655
- at erasing sector 655
- DQ6 to DQ0 = 656
- DQ7 to DQ0 = 656
- ■ RST and RY/BY Timing 657
- Write/erase command sequence 659
- to FFFFFF 660
- ■ List of Interrupt Vectors 660
- FUJITSU LIMITED 681
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