Chapter 11 Freescale’s Scalable Controller Area Network (S12MSCANV3)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
455
•
The transmission buffer with the lowest local priority field wins the prioritization.
In cases of more than one buffer having the same lowest priority, the message buffer with the lower index
number wins.
11.3.3.5
Time Stamp Register (TSRH–TSRL)
If the TIME bit is enabled, the MSCAN will write a time stamp to the respective registers in the active
transmit or receive buffer right after the EOF of a valid message on the CAN bus (see
“MSCAN Control Register 0 (CANCTL0)
”). In case of a transmission, the CPU can only read the time
stamp after the respective transmit buffer has been flagged empty.
The timer value, which is used for stamping, is taken from a free running internal CAN bit clock. A timer
overrun is not indicated by the MSCAN. The timer is reset (all bits set to 0) during initialization mode. The
CPU can only read the time stamp registers.
Module Base + 0x00XD
Access: User read/write
(1)
1. Read: Anytime when TXEx flag is set (see
Section 11.3.2.7, “MSCAN Transmitter Flag Register (CANTFLG)
corresponding transmit buffer is selected in CANTBSEL (see
Section 11.3.2.11, “MSCAN Transmit Buffer Selection Register
”)
Write: Anytime when TXEx flag is set (see
Section 11.3.2.7, “MSCAN Transmitter Flag Register (CANTFLG)
”) and the
corresponding transmit buffer is selected in CANTBSEL (see
Section 11.3.2.11, “MSCAN Transmit Buffer Selection Register
”)
7
6
5
4
3
2
1
0
R
PRIO7
PRIO6
PRIO5
PRIO4
PRIO3
PRIO2
PRIO1
PRIO0
W
Reset:
0
0
0
0
0
0
0
0
Figure 11-36. Transmit Buffer Priority Register (TBPR)
Module Base + 0x00XE
Access: User read/write
(1)
1. Read: For transmit buffers: Anytime when TXEx flag is set (see
Section 11.3.2.7, “MSCAN Transmitter Flag Register
”) and the corresponding transmit buffer is selected in CANTBSEL (see
Section 11.3.2.11, “MSCAN Transmit
Buffer Selection Register (CANTBSEL)
”). For receive buffers: Anytime when RXF is set.
Write: Unimplemented
7
6
5
4
3
2
1
0
R
TSR15
TSR14
TSR13
TSR12
TSR11
TSR10
TSR9
TSR8
W
Reset:
x
x
x
x
x
x
x
x
Figure 11-37. Time Stamp Register — High Byte (TSRH)
Содержание MC9S12ZVHL32
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Страница 686: ...Chapter 20 ECC Generation module SRAM_ECCV1 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 686 Freescale Semiconductor...
Страница 752: ...Chapter 22 Supply Voltage Sensor BATSV2 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 752 Freescale Semiconductor...
Страница 774: ...Chapter 23 LIN Physical Layer S12LINPHYV2 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 774 Freescale Semiconductor...
Страница 788: ...Appendix A MCU Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 788 Freescale Semiconductor...
Страница 794: ...Appendix B ADC Electricals S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 794 Freescale Semiconductor...
Страница 798: ...Appendix D IRC Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 798 Freescale Semiconductor...
Страница 802: ...Appendix F MSCAN Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 802 Freescale Semiconductor...
Страница 806: ...Appendix G NVM Electrical Parameters S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 806 Freescale Semiconductor...
Страница 810: ...Appendix H BATS Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 810 Freescale Semiconductor...
Страница 816: ...Appendix K OSC32K Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 816 Freescale Semiconductor...
Страница 822: ...Appendix L SPI Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 822 Freescale Semiconductor...
Страница 826: ...Appendix M LINPHY Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 826 Freescale Semiconductor...
Страница 829: ...Appendix O Package Information S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 830 Freescale Semiconductor O 1 144 LQFP...
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