
515
6384E–ATARM–05-Feb-10
AT91SAM9G20
32.7.15
USART Manchester Configuration Register
Name:
US_MAN
Access Type:
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
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
ALL_ONE
0
1
ALL_ZERO
10
ZERO_ONE
11
ONE_ZERO
RX_PP
Preamble Pattern default polarity assumed (RX_MPOL field not set)
0
ALL_ONE
0
1
ALL_ZERO
10
ZERO_ONE
11
ONE_ZERO