441
CHAPTER 20 LIN-UART
20.8
Notes on Using LIN-UART
Notes on using LIN-UART are given below.
■
Notes on Using LIN-UART
●
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.
●
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.
●
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.
●
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.
●
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.
●
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.
●
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
Summary of Contents for F2MCTM-16LX
Page 2: ......
Page 3: ...FUJITSU LIMITED F2MCTM 16LX 16 BIT MICROCONTROLLER MB90360 Series HARDWARE MANUAL ...
Page 4: ......
Page 42: ...26 CHAPTER 1 OVERVIEW ...
Page 70: ...54 CHAPTER 2 CPU ...
Page 134: ...118 CHAPTER 6 CLOCK SUPERVISOR ...
Page 176: ...160 CHAPTER 8 LOW POWER CONSUMPTION MODE ...
Page 194: ...178 CHAPTER 10 I O PORTS ...
Page 252: ...236 CHAPTER 13 16 Bit I O TIMER ...
Page 282: ...266 CHAPTER 14 16 BIT RELOAD TIMER ...
Page 296: ...280 CHAPTER 15 WATCH TIMER ...
Page 386: ...370 CHAPTER 18 8 10 BIT A D CONVERTER ...
Page 426: ...410 CHAPTER 20 LIN UART Figure 20 5 2 ORE Flag Set Timing RDRF ORE Reception data ...
Page 540: ...524 CHAPTER 22 ADDRESS MATCH DETECTION FUNCTION ...
Page 568: ...552 CHAPTER 24 512K BIT FLASH MEMORY ...
Page 633: ...617 APPENDIX B Instructions Table B 9 3 Bit Operation Instruction Map first byte 6CH ...
Page 634: ...618 APPENDIX Table B 9 4 Character String Operation Instruction Map first byte 6EH ...
Page 637: ...621 APPENDIX B Instructions Table B 9 7 ea Instruction 2 first byte 71H ...
Page 638: ...622 APPENDIX Table B 9 8 ea Instruction 3 first byte 72H ...
Page 639: ...623 APPENDIX B Instructions Table B 9 9 ea Instruction 4 first byte 73H ...
Page 640: ...624 APPENDIX Table B 9 10 ea Instruction 5 first byte 74H ...
Page 641: ...625 APPENDIX B Instructions Table B 9 11 ea Instruction 6 first byte 75H ...
Page 642: ...626 APPENDIX Table B 9 12 ea Instruction 7 first byte 76H ...
Page 643: ...627 APPENDIX B Instructions Table B 9 13 ea Instruction 8 first byte 77H ...
Page 644: ...628 APPENDIX Table B 9 14 ea Instruction 9 first byte 78H ...
Page 645: ...629 APPENDIX B Instructions Table B 9 15 MOVEA RWi ea Instruction first byte 79H ...
Page 646: ...630 APPENDIX Table B 9 16 MOV Ri ea Instruction first byte 7AH ...
Page 647: ...631 APPENDIX B Instructions Table B 9 17 MOVW RWi ea Instruction first byte 7BH ...
Page 648: ...632 APPENDIX Table B 9 18 MOV Ri ea Instruction first byte 7CH ...
Page 649: ...633 APPENDIX B Instructions Table B 9 19 MOVW ea Rwi Instruction first byte 7DH ...
Page 650: ...634 APPENDIX Table B 9 20 XCH Ri ea Instruction first byte 7EH ...
Page 651: ...635 APPENDIX B Instructions Table B 9 21 XCHW RWi ea Instruction first byte 7FH ...
Page 664: ...648 APPENDIX ...
Page 665: ...649 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 682: ......