Serial Communication Interface (S12SCIV6)
MC9S12VRP Family Reference Manual Rev. 1.3
NXP Semiconductors
329
the verification samples RT3 and RT5 determine that the first low detected was noise and
not the beginning of a start bit. The RT clock is reset and the start bit search begins again. The noise flag
is not set because the noise occurred before the start bit was found.
Figure 10-22. Start Bit Search Example 1
, verification sample at RT3 is high. The RT3 sample sets the noise flag. Although the
perceived bit time is misaligned, the data samples RT8, RT9, and RT10 are within the bit time and data
recovery is successful.
Figure 10-23. Start Bit Search Example 2
Reset RT Clock
RT
1
RT
1
RT
1
RT
1
RT
2
RT
3
RT
4
RT
5
RT
1
RT
1
RT
2
RT
3
RT
4
RT
7
RT
6
RT
5
RT
10
RT
9
RT
8
RT
14
RT
13
RT
12
RT
11
RT
15
RT
16
RT
1
RT
2
RT
3
Samples
RT Clock
RT Clock Count
Start Bit
RXD
1
1
0
1
1
1
1
0
0
0
0
0
LSB
0
0
Reset RT Clock
RT
1
RT
1
RT
1
RT
1
RT
1
RT
1
RT
2
RT
3
RT
4
RT
5
RT
6
RT
7
RT
8
RT
11
RT
10
RT
9
RT
14
RT
13
RT
12
RT
2
RT
1
RT
16
RT
15
RT
3
RT
4
RT
5
RT
6
RT
7
Samples
RT Clock
RT Clock Count
Actual Start Bit
RXD
1
1
1
1
1
1
0
0
0
0
LSB
0
0
Perceived Start Bit
Содержание MC9S12VRP64
Страница 16: ...MC9S12VRP Family Reference Manual Rev 1 3 16 NXP Semiconductors ...
Страница 46: ...Device Overview S12VRP Series MC9S12VRP Family Reference Manual Rev 1 3 46 NXP Semiconductors ...
Страница 92: ...Port Integration Module S12VRPPIMV1 MC9S12VRP Family Reference Manual Rev 1 3 92 NXP Semiconductors ...
Страница 106: ...S12G Memory Map Controller S12GMMCV1 MC9S12VRP Family Reference Manual Rev 1 3 106 NXP Semiconductors ...
Страница 192: ...Background Debug Module S12SBDMV1 MC9S12VRP Family Reference Manual Rev 1 3 192 NXP Semiconductors ...
Страница 236: ...S12S Debug Module S12DBGV2 MC9S12VRP Family Reference Manual Rev 1 3 236 NXP Semiconductors ...
Страница 244: ...Interrupt Module S12SINTV1 MC9S12VRP Family Reference Manual Rev 1 3 244 NXP Semiconductors ...
Страница 340: ...Serial Communication Interface S12SCIV6 MC9S12VRP Family Reference Manual Rev 1 3 340 NXP Semiconductors ...
Страница 358: ...Timer Module TIM16B2CV3 MC9S12VRP Family Reference Manual Rev 1 3 358 NXP Semiconductors ...
Страница 424: ...LIN Physical Layer S12LINPHYV2 MC9S12VRP Family Reference Manual Rev 1 3 424 NXP Semiconductors ...
Страница 436: ...Supply Voltage Sensor BATSV2 MC9S12VRP Family Reference Manual Rev 1 3 436 NXP Semiconductors ...
Страница 488: ...64 KByte Flash Module S12FTMRG64K4KV2 MC9S12VRP Family Reference Manual Rev 1 3 488 NXP Semiconductors ...
Страница 528: ...NVM Electrical Parameters MC9S12VRP Family Reference Manual Rev 1 3 528 NXP Semiconductors ...
Страница 529: ...MC9S12VRP Family Reference Manual Rev 1 3 NXP Semiconductors 529 Appendix J Package Information ...
Страница 530: ...Package Information MC9S12VRP Family Reference Manual Rev 1 3 530 NXP Semiconductors ...
Страница 531: ...Package Information MC9S12VRP Family Reference Manual Rev 1 3 NXP Semiconductors 531 ...
Страница 532: ...Package Information MC9S12VRP Family Reference Manual Rev 1 3 532 NXP Semiconductors ...