ML620Q503/Q504 User's Manual
Chapter 13 UART
FEUL620Q504
13–12
13.3.2
Baud Rate
Baud rates are generated by the baud rate generator.
The baud rate generator generates a baud rate by counting the clock selected by the baud rate clock selection bits
(U0CK1, U0CK0) of the UART0 mode register 0 (UA0MOD0). The count value of the baud rate generator can
be set by writing it in the UART0 baud rate register (UA0BRT). The maximum count is 4096.
The setting value of UA0BRT is expressed by the following equation.
UA0BRT =
Clock frequency (Hz)
-1
Baud rate (bps)
Table 13-1 lists the count values for typical baud rates.
Table 13-1 Count Values for Typical Baud Rates
Baud rate
Baud rate generator
clock selection
Baud rate generator counter value
Error
*1
Baud rate clock
Count value
Period of cycle
UA0BRT
4800bps
16MHz
3333
Approx. 208us
0D04H
0.01%
9600bps
1667
Approx. 104us
0682H
-0.02%
19200bps
833
Approx. 52us
0340H
0.04%
38400bps
417
Approx. 26us
01A0H
-0.08%
57600bps
278
Approx. 17.4us
0115H
-0.08%
115200bps
139
Approx. 8.7us
008AH
-0.08%
*1:The error does not include the clock error. Use this in consideration of an error of Baud rate clock.
Содержание LAPIS SEMICONDUCTOR ML620Q503
Страница 2: ...ML620Q503 Q504 User s Manual Issue Date Apr 16 2015 FEUL620Q504 01...
Страница 18: ...Chapter 1 Overview...
Страница 32: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 50: ...Chapter 4 Power Management...
Страница 70: ...Chapter 5 Interrupts...
Страница 134: ...Chapter 6 Clock Generation Circuit...
Страница 161: ...Chapter 7 Time Base Counter...
Страница 170: ...Chapter 8 Timers...
Страница 183: ...Chapter 9 Function Timer FTM...
Страница 231: ...Chapter 10 Watchdog Timer...
Страница 239: ...Chapter 11 Synchronous Serial Port SSIO...
Страница 251: ...Chapter 12 Synchronous Serial Port with FIFO SSIOF...
Страница 283: ...Chapter 13 UART...
Страница 303: ...Chapter 14 UART with FIFO UARTF...
Страница 327: ...Chapter 15 I2 C Bus Interface...
Страница 344: ...Chapter 16 Port XT...
Страница 350: ...Chapter 17 Port 0...
Страница 361: ...Chapter 18 Port 1...
Страница 368: ...Chapter 19 Port2...
Страница 379: ...Chapter 20 Port 3...
Страница 395: ...Chapter 21 Port 4...
Страница 410: ...Chapter 22 Port 5...
Страница 426: ...Chapter 23 Melody Driver...
Страница 439: ...Chapter 24 RC Oscillation type A D Converter RC ADC...
Страница 462: ...Chapter 25 Successive Approximation Type A D Converter SA ADC...
Страница 479: ...Chapter 26 Analog Comparator...
Страница 489: ...Chapter 27 Flash Memory Control...
Страница 505: ...Chapter 28 Voltage Level Supervisor VLS...
Страница 517: ...Chapter 29 LLD circuit...
Страница 519: ...Chapter 30 On Chip Debug Function...
Страница 522: ...Appendixes...
Страница 552: ...Revision History...