PXS20RM Datasheet, PDF (729/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

FlexRay Communication Controller
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 26.6.16, 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.
Table 26-11. FR_STBSCR Field Descriptions
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 26-12 to
be enabled or disabled and assigned to one of the four strobe ports given in Table 26-12.
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 DBG0
01 assign selected signal to DBG1
10 assign selected signal to DBG2
11 assign selected signal to DBG3
.;
Table 26-12. Strobe signal mapping
SEL
dec hex
0 0x0
1 0x1
2 0x2
3 0x3
4 0x4
5 0x5
6 0x6
7 0x7
8 0x8
9 0x9
10 0xA
11 0xB
12 0xC
13 0xD
arm
mt
cycle start
minislot start
slot start
Description
receive data after glitch filtering
channel idle indicator
syntax error detected
content error detected
Channel Type
—
value
—
value
—
pulse
—
pulse
A
pulse
B
A
value
B
A
level
B
A
pulse
B
A
level
B
Offset¹
Referenc
e
+1
MT start
+1
MT start
0
MT start
0
MT start
0
MT start
+4
CA_RX
CB_RX
+5
CA_RX
CB_RX
+4
CA_RX
CB_RX
+4
CA_RX
CB_RX
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
26-17