FlexRay Module (FLEXRAYV4)
MFR4310 Reference Manual, Rev. 2
72 Freescale Semiconductor
3.3.2.5 Strobe Signal Control Register (STBSCR)
This register is used to assign the individual protocol timing related strobe signals given in Table 3-12 to
the external strobe ports. Each strobe signal can be assigned to at most one strobe port. Each write access
to registers overwrites the previously written ENB and STBPSEL values for the signal indicated by SEL.
If more than one strobe signal is assigned to one strobe port, the current values of the strobe signals are
combined with a binary OR and presented at the strobe port. If no strobe signal is assigned to a strobe port,
the strobe port carries logic 0. For more detailed and timing information refer to Section 3.4.16, “Strobe
Signal Support”.
NOTE
In single channel device mode, channel B related strobe signals are
undefined and should not be assigned to the strobe ports.
1
00
ports RXD_BG1, TXD_BG1, and TXEN1# not driven by FlexRay module
ports RXD_BG2, TXD_BG2, and TXEN1# not driven by FlexRay module
PE channel 0 idle
PE channel 1 idle
01
ports RXD_BG1, TXD_BG1, and TXEN1# driven by FlexRay module
ports RXD_BG2, TXD_BG2, and TXEN1# not driven by FlexRay module
PE channel 0 active
PE channel 1 idle
10
ports RXD_BG1, TXD_BG1, and TXEN1# driven by FlexRay module
ports RXD_BG2, TXD_BG2, and TXEN1# not driven by FlexRay module
PE channel 0 active, uses cCrcInit[B] (see Figure 3-131)
PE channel 1 idle
11reserved
Table 3-10. FlexRay Channel Bit Rate Selection
MCR [BITRATE] FlexRay Channel Bit Rate [Mbit/s]
000 10.0
001 5.0
010 2.5
011 8.0
100 reserved
101 reserved
110 reserved
111 reserved
0x0008 16-bit write access required Write: Any Time
1514131211109876543210
R0
SEL
000
ENB
00
STBPSEL
WWMD
Reset0000000000000000
Figure 3-4. Strobe Signal Control Register (STBSCR)
Table 3-9. FlexRay Channel Selection (Continued)
SCM CHB CHA Description
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