327
CHAPTER 19 UART0, UART1
19.7
Transfer Data Format
UART0, UART1 only handle NRZ (non-return-to-zero) type data. Figure 19.7-1 shows the
relationship between the transmit/receive clock and the data for CLK synchronous
mode.
■
Transfer Data Format
Figure 19.7-1 Transfer Data Format
As shown in Figure 19.7-1, the transfer data always starts with the start bit ("L" level data), the specified
number of data bits are transmitted with the LSB first, then transmission ends with the stop bit ("H" level
data). Always input a clock if external clock operation is selected. When an internal clock (the dedicated
baud rate generator or 16-bit Reload Timer) is selected, the clock is output continuously. When using CLK
synchronous transfer, do not start data transfer until the selected baud rate clock has stabilized (for two
baud rate clock cycles).
When using CLK asynchronous transfer, set the SCKE bit in the UMC0, UMC1 register to "0" to disable
clock output. The transfer data format of SIN0, SIN1 and SOUT0, SOUT1 is the same as shown in Figure
SCK0
SIN0, SOT0
0
1
0
1
1
0
1
0
0
1
1
Start
LSB
MSB
Stop
D8 Stop
⎫
⎬
⎭
Depends
on the mode.
The transferred data is "01001101
B
" (mode 1) or "101001101
B
" (mode 3).
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 ...
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Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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