ML620Q503/Q504 User's Manual
Chapter 14 UART with FIFO(UARTF)
FEUL620Q504 14-19
14.3.3 Baud Rate Clock Generation
A baud rate is obtained by the following expression:
Baud rate frequency = SYSCLK x (UAF0CAJ-1)/UAF0CAJ/(DLR[15:0] x 16)
Although actually available baud rate for communication depends on the software processing, a 115200bps baud
rate can be used for communication with the DLR=8 setting in an ideal state of 16MHz SYSCLK.
Make sure that the margin of error between the actual and set baud rates is within a few percent.
[Note]
Divisor (DLR[15:0]) cannot be set to 1. Set a value of 0 (stop) or greater than 2.
The following table shows the relation among SYSCLK, DLR, and baud rates.
Baud rate
(bps)
SYSCLK
DLR
(Hex)
error
*1
(%)
2400
0181
0.09 to 0.10
4800
00C0
-0.16
9600
0060
-0.16
19200
16MHz
0030
-0.16
38400
0018
-0.16
57600
0010
-0.18 to 0.08
115200
0008
-0.21 to 0.08
*1: The error does not include the clock error. User this in consideration of an error of SYSCLK.
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...