FAQ
- M051 Base Series(95)
- M0518 Series(97)
- M0519 Series(43)
- M0564 Series(1)
- Mini51 Base Series(90)
- Nano100/102 Base Series(101)
- Nano103 Base Series(10)
- Nano110/112 LCD Series(100)
- Nano120 USB Series(111)
- Nano130 Advanced Series(110)
- NUC029 Series(94)
- NUC100/200 Advanced Series(102)
- NUC120/122/123/220 USB Series(116)
- NUC121/125 Series(1)
- NUC126 USB Series(2)
- NUC130/230 CAN Series(103)
- NUC131/NUC1311 CAN Series(98)
- NUC140/240 Connectivity Series(114)
- M451 Base Series(118)
- M451M Series(117)
- M452 USB Series(130)
- M4521 USB Series(1)
- M453 CAN Series(128)
- M463 CAN FD/USB HS Series(1)
- M467 Ethernet/Crypto Series(1)
- M471 Series(1)
- M479 Motor Control Series(1)
- M481 Base Series(4)
- M482 USB FS OTG Series(4)
- M483 CAN Series(4)
- M484 USB HS OTG Series(4)
- M485 Crypto Series(4)
- M487 Ethernet Series(4)
- M4TK Touch Key Series(25)
- NUC442/472 Series(130)
- NUC472 Series(1)
- NUC505 Series(138)
Products
Applications
Function
+
FAQ
How to use Low Power UART (LP UART) baud rate compensation? Issue Date：2018-01-16
- User can set the bit to be compensated using BRCOMP (UART_BRCOMP [8: 0]) and set the positive or negative compensation using BRCOMPDEC (UART_BRCOMP [31]) to increase or decrease the bit data time by 1 UART clock.
- Low Power UART register
- Example
UART peripheral clock = 32.768K (LXT)
UART Baud rate = 9600, 1bit = 104.167us
The original waveform represents 1 bit UART data ( (1 / 32.768K) * 3 = 91.55us) according to 3 UART clocks. The waveform is as follows:
The register setting is as follows:
BRCOMP[8:0] = 0x0010100101
BRCOMPDEC[31] = 0
1 UART clock time compensated at bit0, bit2, bit5, bit7 = ((1/32.768K) * 4 = 122.07us)
The waveform is as follows:
When the compensation function is enabled, the UART baud rate error can be controlled within ± 0.5 UART clock.
| Products: | |
|---|---|
| Applications: | |
| Function: | Peripherals,ARM,Cortex-M4,Connectivity,UART |