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MAX17841BGUE 数据表(PDF) 11 Page - Maxim Integrated Products |
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MAX17841BGUE 数据表(HTML) 11 Page - Maxim Integrated Products |
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11 / 33 page ![]() Stop Character The stop character is a framing character that the UART generates to signal the end of a message. It is transmit- ted as an unencoded 54h, but it is still a DC-balanced character. Manchester Encoding Each data byte is transmitted as two separate nibbles (four bits) that are Manchester-encoded. For each data bit, the first bit represents the information and the second bit is its complement. The parity is even so its value should always result in an even number of high bits. Since the data is Manchester-encoded and there are twoSTOPbits,theparitybitfordatacharacters(butnot framingcharacters)shouldalwaysbezero. Figure 8. UART Timing for a Stop Character Figure 9. UART Timing for a Manchester-Encoded Data Nibble 0h OPTIONAL IDLE S 0 0 1 0 1 0 1 0 E = 1 P P IDLE DISABLE OPTIONAL IDLE IDLE ENABLE OPTIONAL IDLE S 0 1 0 1 0 1 0 0 0 0 0 1 E = 0 P P IDLE DISABLE OPTIONAL IDLE DATA NIBBLE = 0h IDLE ENABLE Maxim Integrated │ 11 MAX17841B Automotive SPI Communication Interface (ASCI) www.maximintegrated.com |
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