NXP Semiconductors MPC5644A, Reference Manual, Page: 1460 / 1735

FlexRay Communication Controller (FlexRay)
MPC5644A Microcontroller Reference Manual, Rev. 6
1460 Freescale Semiconductor
33.5.2.6 Strobe Signal Control Register (FR_STBSCR)
This register is used to assign the individual protocol timing related strobe signals given in Table 33-12 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 33.6.16, 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.
.;
Base + 0x0008 16-bit write access required Write: Anytime
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0 0 0 0
SEL
0 0 0
ENB
0 0
STBPSEL
W WMD
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 33-6. Strobe Signal Control Register (FR_STBSCR)
Table 33-11. FR_STBSCR field description
Field Description
WMD Write Mode — This control bit defines the write mode of this register.
0 Write to all fields in this register on write access.
1 Write to SEL field only on write access.
SEL Strobe Signal Select — This control field selects one of the strobe signals given in Table 33-12 to be
enabled or disabled and assigned to one of the four strobe ports given in Table 33-12 .
ENB Strobe Signal Enable — The control bit is used to enable and to disable the strobe signal selected by
STBSSEL.
0 Strobe signal is disabled and not assigned to any strobe port.
1 Strobe signal is enabled and assigned to the strobe port selected by STBPSEL.
STBPSEL Strobe Port Select — This field selects the strobe port that the strobe signal selected by the SEL is
assigned to. All strobe signals that are enabled and assigned to the same strobe port are combined
with a binary OR operation.
00 assign selected signal to FR_DBG[0]
01 assign selected signal to FR_DBG[1]
10 assign selected signal to FR_DBG[2]
11 assign selected signal to FR_DBG[3]
Table 33-12. Strobe signal mapping
SEL
Description Channel Type Offset
1
Reference
dec hex
0 0x0 arm — value +1 MT start
1 0x1 mt — value +1 MT start