![NXP Semiconductors MPC5605BK Скачать руководство пользователя страница 239](http://html.mh-extra.com/html/nxp-semiconductors/mpc5605bk/mpc5605bk_reference-manual_1721852239.webp)
Chapter 14 CAN Sampler
MPC5606BK Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
239
14.3.2
CAN Sampler Sample Registers 0–11
14.4
Functional description
As the CAN Sampler is driven by the 16 MHz fast internal RC oscillator to sample properly the CAN
identifier, two modes are possible depending on both CAN baud rate and low power mode used:
•
Immediate sampling on falling edge detection (first CAN frame): this mode is used when the fast
internal RC oscillator 16 MHz is available in LP mode, for example, STOP or HALT.
•
Sampling on next frame (second CAN frame): this mode is used when the fast internal RC
oscillator 16 MHz is switched off in low power mode, such as STANDBY. Due to the start-up times
of both the voltage regulator and the fast internal RC oscillator 16 MHz (~10 µs), the CAN sampler
would miss the first bits of a CAN identifier sent at 500 kbit/s. Therefore the first identifier is
ignored and the sampling is performed on the first falling edge of after interframe space.
CAN_RX_SEL
These bits determine which RX bit is sampled.
000: Rx0 is selected
001: Rx1 is selected
010: Rx2 is selected
011: Rx3 is selected
100: Rx4 is selected
101: Rx5 is selected
110: Rx6 is selected
111: Rx7 is selected
BRP
Baud Rate Prescaler
These bits are used to set the baud rate before going into standby mode
00000: Prescaler has 1
11111: Prescaler has 32
CAN_SMPLR_EN CAN SAMPLER Enable
This bit enables the CAN Sampler before going into standby or stop mode.
0: CAN Sampler is disabled
1: Can Sampler is enabled
Offsets: 0x04–0x30 (12 registers)
Access: Read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
SR[0:15]
W
Reset
The reset values are unknown. They will be filled only after the first CAN sampling.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
SR[16:31]
W
Reset
The reset values are unknown. They will be filled only after the first CAN sampling.
Figure 14-3. CAN Sampler Sample Registers 0–11
Table 14-2. CR field descriptions (continued)
Field
Description
Содержание MPC5605BK
Страница 2: ...This page is intentionally left blank...
Страница 20: ...MPC5606BK Microcontroller Reference Manual Rev 2 20 Freescale Semiconductor...
Страница 103: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 103 Clocks and power...
Страница 104: ...MPC5606BK Microcontroller Reference Manual Rev 2 104 Freescale Semiconductor This page is intentionally left blank...
Страница 243: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 243 Core platform modules...
Страница 244: ...MPC5606BK Microcontroller Reference Manual Rev 2 244 Freescale Semiconductor This page is intentionally left blank...
Страница 395: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 395 Communication modules...
Страница 396: ...MPC5606BK Microcontroller Reference Manual Rev 2 396 Freescale Semiconductor This page is intentionally left blank...
Страница 548: ...Chapter 24 LIN Controller LINFlexD MPC5606BK Microcontroller Reference Manual Rev 2 548 Freescale Semiconductor...
Страница 645: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 643 Timers...
Страница 646: ...MPC5606BK Microcontroller Reference Manual Rev 2 644 Freescale Semiconductor This page is intentionally left blank...
Страница 715: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 713 ADC system...
Страница 716: ...MPC5606BK Microcontroller Reference Manual Rev 2 714 Freescale Semiconductor This page is intentionally left blank...
Страница 787: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 787 Memory...
Страница 788: ...MPC5606BK Microcontroller Reference Manual Rev 2 788 Freescale Semiconductor This page is intentionally left blank...
Страница 893: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 893 Integrity...
Страница 894: ...MPC5606BK Microcontroller Reference Manual Rev 2 894 Freescale Semiconductor This page is intentionally left blank...
Страница 943: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 943 Debug...
Страница 944: ...MPC5606BK Microcontroller Reference Manual Rev 2 944 Freescale Semiconductor This page is intentionally left blank...