
ML610471/472/473/Q471/Q472/Q473 User's Manual
Chapter 11 UART
11-19
11.3.5.3 Receive Margin
If there is an error between the sender baud rate and the baud rate generated by the baud rate generator of this LSI, the
error accumulates until the last stop bit loading in one frame, decreasing the receive margin. This receive margin needs to
be fully considered, particularly when the baud rate generator clock uses a lower frequency such as LSCLK and LSCLK x
2 to realize a higher bit rate (e.g., 4800bps, 9600bps).
Figure 11-9 shows the baud rate errors and receive margin waveforms.
Figure 11-9 Baud Rate Error and Receive Margin
Note:
In system designing, ensure a sufficient receive margin considering the baud rate difference between sender and
receiver, start bit detection delay, distortion in receive data, and influence of noise.
Sender baud rate is
slow (RXD0)
Sampling Timing
U0RSS=1
U0RSS=0
Start
Start
Start
Stop
Stop
Stop
Sender baud rate is
fast (RXD0)
Ideal waveform (RXD0)
Содержание ML610471
Страница 12: ...Chapter 1 Overview...
Страница 38: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 48: ...Chapter 4 MCU Control Function...
Страница 62: ...Chapter 5 Interrupts...
Страница 82: ...Chapter 6 Clock Generation Circuit...
Страница 94: ...Chapter 7 Time Base Counter...
Страница 105: ...Chapter 8 Capture...
Страница 114: ...Chapter 9 Timer...
Страница 133: ...Chapter 10 Watchdog Timer...
Страница 141: ...Chapter 11 UART...
Страница 164: ...Chapter 12 Port 0...
Страница 173: ...Chapter 13 Port 2...
Страница 180: ...Chapter 14 Port 3...
Страница 188: ...Chapter 15 Port 4...
Страница 199: ...Chapter 16 Port 6...
Страница 205: ...Chapter 17 RC Oscillation Type A D Converter...
Страница 225: ...Chapter 18 LCD Drivers...
Страница 243: ...Chapter 19 Power Supply Circuit...
Страница 245: ...Chapter 20 uEASE Flash Writer System...
Страница 249: ...Chapter 21 Software Development...
Страница 258: ...Appendixes...
Страница 280: ...Revision History...