A96G150 User's manual
16. USART2
231
If more than 2 samples have low levels, the received bit is considered to a logic 0. If more than 2
samples have high levels, the received bit is considered to a logic 1. The data recovery process is then
repeated until a complete frame is received including the first stop bit. The decided bit value is stored
in the receive shift register in order. Note that the Receiver only uses the first stop bit of a frame.
Internally, after receiving the first stop bit, the Receiver is in idle state and waiting to find start bit.
Figure 102. Sampling of Data and Parity Bit
A process for detecting stop bit is similar to the clock and data recovery process. That is, if 2 or more
samples of 3 center values have high level, correct stop bit is detected. If not, a Frame Error flag will be
set. After deciding whether a valid stop bit is received or not, the Receiver enters into idle state and
monitors the RXD2 line to check a valid high to low transition is detected (start bit detection).
Figure 103. Stop Bit Sampling and Next Start Bit Sampling
RxD2
1
2
3
4
5
6
7
8
9
10
11
12 13
14 15
16
1
BIT n
1
2
3
4
5
6
7
8
1
Sample
(U2X = 0)
Sample
(U2X = 1)
RxD2
1
2
3
4
5
6
7
8
9
10
11
12 13
STOP 1
1
2
3
4
5
6
7
Sample
(U2X = 0)
Sample
(U2X = 1)
(A)
(B)
(C)
Содержание A96G150
Страница 126: ...12 Timer 0 1 2 3 4 5 A96G150 User s manual 126 Figure 43 16 bit Timer Counter Mode Operation Example...
Страница 136: ...12 Timer 0 1 2 3 4 5 A96G150 User s manual 136 Figure 51 16 bit Timer Counter Mode Operation Example...
Страница 147: ...A96G150 User s manual 12 Timer 0 1 2 3 4 5 147 Figure 59 16 bit Timer Counter Mode Operation Example...
Страница 157: ...A96G150 User s manual 12 Timer 0 1 2 3 4 5 157 Figure 67 16 bit Timer Counter Mode Operation Example...
Страница 171: ...A96G150 User s manual 14 12 bit ADC 171 Figure 79 ADC Operation Flow Sequence...
Страница 333: ...A96G150 User s manual Revision history 333 Revision history Revision Date Notes 1 00 2022 06 22 First creation...