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CHAPTER 20 UART2, UART3
Table 20.4-6 Function of Each Bit of the Extended Communication Control Register (ECCR2/ECCR3)
Bit name
Function
bit7
-
This bit is undefined. Always write "0".
bit6
LBR: Generating
LIN synch break bit
Writing a "1" to this bit generates a LIN synch break of the length selected by the LBL0/
LBL1 bits of the ESCR2/ESCR3, if operation mode 3 is selected. Setting to "0" in
operation mode 0.
bit5
MS:
Master/Slave mode
selection bit
This bit selects master or slave mode of UART2, UART3 in synchronous mode 2. If
master is selected UART2, UART3 generates the synchronous clock by itself. If slave
mode is selected,
UART2, UART3 receives external serial clock.
This bit is fixed to "0" in operation mode 0, 1 and 3.
Note:
If slave mode is selected, the clock source must be external and set to "One-to-One"
(SMR2/SMR3: SCKE = 0, EXT = 1, OTO = 1).
bit4
SCDE:
Serial clock delay
enable bit
If this bit is set the serial output clock is delayed as shown in Figure 20.7-5 if UART2, 3
operates in master mode 2.
Note:
Figure 20.7-5 shows the behavior of MB90V390HA/MB90V390HB/MB90394HA
(the delay is one half serial clock cycle). For MB90V390H/MB90F394H(A), the
delay is one machine clock cycle.
bit3
SSM:
Start/Stop bit mode
enable
This bit adds start and stop bits to the synchronous data format in operation mode 2. It is
ignored in mode 0, 1, and 3.
bit2
Undefined bit
Undefined bit. Reading value is undefined. Always write to "
0
".
bit1
RBI:
Reception bus idle
flag bit
This bit is "1" if there is no reception activity on the SIN2/SIN3 pin and it is kept at "1".
Do not use this bit in mode 2 when SSM=0.
bit0
TBI:
Transmission bus idle
flag bit
This bit is "1" if there is no transmission activity on the SOT2/SOT3 pin.
Do not use this bit in mode 2 when SSM=0.
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
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Страница 132: ...104 CHAPTER 5 CLOCKS ...
Страница 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Страница 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Страница 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Страница 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Страница 274: ...246 CHAPTER 15 WATCH TIMER ...
Страница 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Страница 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 364: ...336 CHAPTER 19 UART0 UART1 ...
Страница 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Страница 432: ...404 CHAPTER 20 UART2 UART3 ...
Страница 482: ...454 CHAPTER 22 SERIAL I O ...
Страница 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Страница 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Страница 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Страница 722: ...694 APPENDIX ...
Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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