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M451
May. 4, 2018
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RS-485 Normal Multidrop Operation Mode (NMM)
In RS-485 Normal Multidrop Operation Mode (RS485NMM (UART_ALTCTL[8]) = 1), in first,
software must decide the data which before the address byte be detected will be stored in RX
FIFO or not. If software wants to ignore any data before address byte detected, the flow is set
RXOFF (UART_FIFO [8]) then enable RS485NMM (UART_ALTCTL [8]) and the receiver will
ignore any data until an address byte is detected (bit 9 = 1) and the address byte data will be
stored in the RX FIFO. If software wants to receive any data before address byte detected, the
flow is disables RXOFF (UART_FIFO [8]) then enable RS485NMM (UART_ALTCTL [8]) and the
receiver will received any data.
If an address byte is detected (bit 9 = 1), it will generate an interrupt to CPU and RXOFF
(UART_FIFO [8]) can decide whether accepting the following data bytes are stored in the RX
FIFO. If software disables receiver by setting RXOFF (UART_FIFO [8]) register, when a next
address byte is detected, the controller will clear the RXOFF (UART_FIFO [8]) bit and the address
byte data will be stored in the RX FIFO.
Содержание ARM Cortex NuMicro M451 Series
Страница 301: ...M451 May 4 2018 Page 301 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL...
Страница 324: ...M451 May 4 2018 Page 324 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL Figure 6 4 18 Checksum Calculation Flow...
Страница 355: ...M451 May 4 2018 Page 355 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL 2 0 Reserved Reserved...
Страница 625: ...M451 May 4 2018 Page 625 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL 00 5 bits 01 6 bits 10 7 bits 11 8 bits...
Страница 721: ...M451 May 4 2018 Page 721 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL the SCL line 1 0 Reserved Reserved...
Страница 1001: ...M451 May 4 2018 Page 1001 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 64L 10x10x1 4 mm footprint 2 0 mm 9 2...
Страница 1002: ...M451 May 4 2018 Page 1002 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 64L 7x7x1 4 mm footprint 2 0 mm 9 3...
Страница 1003: ...M451 May 4 2018 Page 1003 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 48L 7x7x1 4mm footprint 2 0mm 9 4...