Datasheet

SAM9G20
DS60001516A-page 494  2017 Microchip Technology Inc.
31.7.15 USART Manchester Configuration Register
Name:US_MAN
Access:Read/Write
TX_PL: Transmitter Preamble Length
0: The Transmitter Preamble pattern generation is disabled
1–15: The Preamble Length is TX_PL x Bit Period
TX_PP: Transmitter Preamble Pattern
TX_MPOL: Transmitter Manchester Polarity
0: Logic Zero is coded as a zero-to-one transition, Logic One is coded as a one-to-zero transition.
1: Logic Zero is coded as a one-to-zero transition, Logic One is coded as a zero-to-one transition.
RX_PL: Receiver Preamble Length
0: The receiver preamble pattern detection is disabled
1–15: The detected preamble length is RX_PL x Bit Period
RX_PP: Receiver Preamble Pattern detected
RX_MPOL: Receiver Manchester Polarity
0: Logic Zero is coded as a zero-to-one transition, Logic One is coded as a one-to-zero transition.
1: Logic Zero is coded as a one-to-zero transition, Logic One is coded as a zero-to-one transition.
31 30 29 28 27 26 25 24
– DRIFT 1 RX_MPOL – – RX_PP
23 22 21 20 19 18 17 16
–––– RX_PL
15 14 13 12 11 10 9 8
– – – TX_MPOL – – TX_PP
76543210
––––
TX_PL
TX_PP Preamble Pattern default polarity assumed (TX_MPOL field not set)
0 0 ALL_ONE
0 1 ALL_ZERO
1 0 ZERO_ONE
11ONE_ZERO
RX_PP Preamble Pattern default polarity assumed (RX_MPOL field not set)
0 0 ALL_ONE
0 1 ALL_ZERO
1 0 ZERO_ONE
11ONE_ZERO