BaudRate 计算说明

更新时间：2023-09-18 17:18:01 阅读量：幼儿教育文档下载

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LSPCLK = SYSCLKOUT/4 = 25Mhz BRR = LSPCLK/(baud rate * 8) - 1

Baud rate = 2400bps:

BRR = 25M/(2400*8)-1 = 1301 SCIHBAUD = 0x05 SCILBAUD = 0x15

Baud rate = 4800bps:

BRR = 25M/(4800*8)-1 = 650 SCIHBAUD = 0x02 SCILBAUD = 0x8A

Baud rate = 9600bps:

BRR = 25M/(9600*8)-1 = 324 SCIHBAUD = 0x01 SCILBAUD = 0x44

Baud rate = 19200bps:

BRR = 25M/(19200*8)-1 = 162 SCIHBAUD = 0x00 SCILBAUD = 0xA2

Baud rate = 38400bps:

BRR = 25M/(38400*8)-1 = 80 SCIHBAUD = 0x00 SCILBAUD = 0x50

Baud rate = 57600bps:

BRR = 25M/(57600*8)-1 = 53 SCIHBAUD = 0x00 SCILBAUD = 0x35

Baud rate = 115200bps:

BRR = 25M/(115200*8)-1 = 26 SCIHBAUD = 0x00 SCILBAUD = 0x1A

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