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CHAPTER 20 LIN-UART
20.8
Notes on Using LIN-UART
Notes on using LIN-UART are given below.
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Notes on Using LIN-UART
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Enabling operations
In LIN-UART, the serial control register (SCR) has TXE (transmission) and RXE (reception) operation
enable bits. Both, transmission and reception operations, must be enabled before the communication starts
because they have been disabled as the default value (initial value). The operation can also be canceled by
disabling these bits.
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Communication mode setting
Set the communication mode while the system is not operating. If the mode is changed during transmission
or reception, the transmission or reception is stopped and possible data will be lost.
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Transmission interrupt enabling timing
The default (initial value) of the transmission data empty flag bit (SSR: TDRE) is "1" (no transmission data
and transmission data write enable state). A transmission interrupt request is generated as soon as the
transmission interrupt request is enabled (SSR: TIE=1). Be sure to set the TIE flag to "1" after setting the
transmission data to avoid an immediate interrupt.
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Changing operation settings
It is strongly recommended to reset LIN-UART after changing operation settings. Particularly if (for
example) start-/stop-bits added to or removed from the data format.
If settings in the serial mode register (SMR) are desired, it is not useful to set the UPCL bit to 1 at the same
time to reset LIN-UART. The correct operation settings are not guaranteed in this case. Thus it is
recommended to set the bits of the SMR and then to reset them again plus the UPCL bit.
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Using LIN operation mode 3
The LIN features are available in mode 3 (transmitting, receiving synch break), but using mode 3 sets the
UART data format automatically to LIN format (8N1, LSB first). Note that the length of the synch break
for transmission is variable but for reception it is fixed 11-bit time.
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LIN slave settings
Set the baud rate before receiving the first LIN synch break for the slave operation. This is needed to detect
the minimum of 13-bit time of a LIN synch break surely.
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Software compatibility
Although this LIN-UART is similar to other LIN-UART in other microcontrollers, it is not software
compatible to them. The programming models may be the same, but the structure of the registers differ.
Furthermore, the setting of the baud rate is now determined by a reload value instead of selecting a
Содержание F2MCTM-16LX
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Страница 3: ...FUJITSU LIMITED F2MCTM 16LX 16 BIT MICROCONTROLLER MB90360 Series HARDWARE MANUAL ...
Страница 4: ......
Страница 42: ...26 CHAPTER 1 OVERVIEW ...
Страница 66: ...50 CHAPTER 2 CPU MOV ILM imm8 The instruction is executed normally but the prefix affects the next instruction ...
Страница 70: ...54 CHAPTER 2 CPU ...
Страница 134: ...118 CHAPTER 6 CLOCK SUPERVISOR ...
Страница 176: ...160 CHAPTER 8 LOW POWER CONSUMPTION MODE ...
Страница 194: ...178 CHAPTER 10 I O PORTS ...
Страница 252: ...236 CHAPTER 13 16 Bit I O TIMER ...
Страница 282: ...266 CHAPTER 14 16 BIT RELOAD TIMER ...
Страница 295: ...279 CHAPTER 15 WATCH TIMER ORG 00FFDCH Reset vector set DSL START DB 00H Set to single chip mode VECT ENDS END START ...
Страница 296: ...280 CHAPTER 15 WATCH TIMER ...
Страница 386: ...370 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 426: ...410 CHAPTER 20 LIN UART Figure 20 5 2 ORE Flag Set Timing RDRF ORE Reception data ...
Страница 540: ...524 CHAPTER 22 ADDRESS MATCH DETECTION FUNCTION ...
Страница 568: ...552 CHAPTER 24 512K BIT FLASH MEMORY ...
Страница 633: ...617 APPENDIX B Instructions Table B 9 3 Bit Operation Instruction Map first byte 6CH ...
Страница 634: ...618 APPENDIX Table B 9 4 Character String Operation Instruction Map first byte 6EH ...
Страница 635: ...619 APPENDIX B Instructions Table B 9 5 2 byte Instruction Map first byte 6FH MUL MULW DIVU A A A ...
Страница 637: ...621 APPENDIX B Instructions Table B 9 7 ea Instruction 2 first byte 71H ...
Страница 638: ...622 APPENDIX Table B 9 8 ea Instruction 3 first byte 72H ...
Страница 639: ...623 APPENDIX B Instructions Table B 9 9 ea Instruction 4 first byte 73H ...
Страница 640: ...624 APPENDIX Table B 9 10 ea Instruction 5 first byte 74H ...
Страница 641: ...625 APPENDIX B Instructions Table B 9 11 ea Instruction 6 first byte 75H ...
Страница 642: ...626 APPENDIX Table B 9 12 ea Instruction 7 first byte 76H ...
Страница 643: ...627 APPENDIX B Instructions Table B 9 13 ea Instruction 8 first byte 77H ...
Страница 644: ...628 APPENDIX Table B 9 14 ea Instruction 9 first byte 78H ...
Страница 645: ...629 APPENDIX B Instructions Table B 9 15 MOVEA RWi ea Instruction first byte 79H ...
Страница 646: ...630 APPENDIX Table B 9 16 MOV Ri ea Instruction first byte 7AH ...
Страница 647: ...631 APPENDIX B Instructions Table B 9 17 MOVW RWi ea Instruction first byte 7BH ...
Страница 648: ...632 APPENDIX Table B 9 18 MOV Ri ea Instruction first byte 7CH ...
Страница 649: ...633 APPENDIX B Instructions Table B 9 19 MOVW ea Rwi Instruction first byte 7DH ...
Страница 650: ...634 APPENDIX Table B 9 20 XCH Ri ea Instruction first byte 7EH ...
Страница 651: ...635 APPENDIX B Instructions Table B 9 21 XCHW RWi ea Instruction first byte 7FH ...
Страница 664: ...648 APPENDIX ...
Страница 665: ...649 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
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