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).
Summary of Contents for MB90390 Series
Page 2: ......
Page 4: ......
Page 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
Page 18: ...xiv ...
Page 132: ...104 CHAPTER 5 CLOCKS ...
Page 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Page 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Page 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Page 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Page 274: ...246 CHAPTER 15 WATCH TIMER ...
Page 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Page 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Page 364: ...336 CHAPTER 19 UART0 UART1 ...
Page 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Page 432: ...404 CHAPTER 20 UART2 UART3 ...
Page 482: ...454 CHAPTER 22 SERIAL I O ...
Page 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Page 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Page 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Page 722: ...694 APPENDIX ...
Page 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
Page 740: ......