FlexRay Communication Controller (FLEXRAY)
22-138
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
2. Read STBCSR.
The SEL field provides N and the ENB and STBPSEL fields provides the settings for signal N.
22.6.16.2 Strobe Signal Timing
This section provides detailed timing information of the strobe signals with respect to the protocol engine
clock.
The strobe signals display internal PE signals. Due to the internal architecture of the PE, some signals are
generated several PE clock cycles before the actual action is performed on the FlexRay Bus. These signals
are listed in
with a negative clock offset. An example waveform is given in
Figure 22-146. Strobe Signal Timing (type = pulse, clk_offset = -2)
Other signals refer to events that occurred on the FlexRay Bus some cycles before the strobe signal is
changed. These signals are listed in
with a positive clock offset. An example waveform is
given in
.
Figure 22-147. Strobe Signal Timing (type = pulse, clk_offset = +4)
22.6.17 Timer Support
The controller provides two timers, which run on the FlexRay time base. Each timer generates a maskable
interrupt when it reaches a configured point in time. Timer T1 is an absolute timer. Timer T2 can be
configured to be an absolute or a relative timer
.
Both timers can be configured to be repetitive. In the
non-repetitive mode, timer stops if it expires. In repetitive mode, timer is restarted when it expires.
Both timers are active only when the protocol is in
POC:normal active
or
POC:normal passive
state. If
the protocol is not in one of these modes, the timers are stopped. The application must restart the timers
when the protocol has reached the
POC:normal active
or
POC:normal passive
state.
PE Clock
Strobe Signal
FlexRay Bus Event
-2
PE Clock
Strobe Signal
FlexRay Bus Event
+4
Summary of Contents for PXR4030
Page 1: ...PXR40 Microcontroller Reference Manual Devices Supported PXR4030 PXR4040 PXR40RM Rev 1 06 2011...
Page 30: ...PXR40 Microcontroller Reference Manual Rev 1 Freescale Semiconductor xxx...
Page 40: ...PXR40 Microcontroller Reference Manual Rev 1 xl Freescale Semiconductor...
Page 66: ...Memory Map PXR40 Microcontroller Reference Manual Rev 1 2 4 Freescale Semiconductor...
Page 120: ...Signal Descriptions 3 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 860: ...FlexCAN Module 24 50 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 1167: ...Decimation Filter Freescale Semiconductor 28 53 PXR40 Microcontroller Reference Manual Rev 1...
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