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通過the pulse length可以算出? baud/s |
| 作者:acctonmike 欄目:通信技術(shù) |
IrDA-1 (The first infra red specificatins) was capable of 115.2K baud and was interfaced into a UART. The PULSE length however was cut down to 3/16th of a RS232 bit length to conserve POWER considering these devices are mainly used on diaries, laptops and palmtops. RS232 was capable of ? baud. 通過the PULSE length可以算出? baud/s |
| 2樓: | >>參與討論 |
| 作者: chunyang 于 2006/12/4 17:51:00 發(fā)布:
可以,但單個(gè)PULSE可能不夠 首個(gè)數(shù)據(jù)為1的可用單個(gè)脈寬計(jì)算,但這需要特定的引導(dǎo)符,實(shí)用中,根據(jù)串行通訊的起始、終止位是固定的低電平這一特點(diǎn),只要找出連續(xù)定長的低電平間隔(一般兩個(gè)就夠),即可準(zhǔn)確算出波特率,自適應(yīng)波特率就是這樣實(shí)現(xiàn)的。 |
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