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Chapter 13 FlexRay Communication Controller (FLEXRAY)
MC9S12XF - Family Reference Manual, Rev.1.19
Freescale Semiconductor
517
Write: MTE: Anytime; CYCCNTMSK,CYCCNTVAL: POC:cong
This register controls the transmission of the Media Access Test Symbol MTS on channel B. For more
13.5.2.51 Receive Shadow Buffer Index Register (RSBIR)
Write: WMD, SEL: Any Time; RSBIDX: POC:cong
This register is used to provide and retrieve the indices of the message buffer header elds currently
associated with the receive shadow buffers. For more details on the receive shadow buffer concept, refer
Table 13-60. MTSBCFR Field Descriptions
Field
Description
15
MTE
Media Access Test Symbol Transmission Enable — This control bit is used to enable and disable the
transmission of the Media Access Test Symbol in the selected set of cycles.
0 MTS transmission disabled
1 MTS transmission enabled
13–8
CYCCNTMSK
Cycle Counter Mask — This eld provides the lter mask for the MTS cycle count lter.
5–0
CYCCNTVAL
Cycle Counter Value — This eld provides the lter value for the MTS cycle count lter.
Module Base + 0x0084
16-bit write access required
15
14
13
12
11
10
9876543210
R0
0
SEL
000000
RSBIDX
W WMD
Reset
0000000000000000
Table 13-61. RSBIR Field Descriptions
Field
Description
15
WMD
Write Mode — This bit controls the write mode for this register.
0 update SEL and RSBIDX eld on register write
1 update only SEL eld on register write
13–12
SEL
Selector — This eld is used to select the internal receive shadow buffer index register for access.
00 RSBIR_A1 — receive shadow buffer index register for channel A, segment 1
01 RSBIR_A2 — receive shadow buffer index register for channel A, segment 2
10 RSBIR_B1 — receive shadow buffer index register for channel B, segment 1
11 RSBIR_B2 — receive shadow buffer index register for channel B, segment 2
5–0
RSBIDX
Receive Shadow Buffer Index — This eld contains the current index of the message buffer header eld of the
receive shadow message buffer selected by the SEL eld. The FlexRay block uses this index to determine the
physical location of the shadow buffer header eld in the FlexRay memory. The FlexRay block will update this
eld during receive operation.The application provides initial message buffer header index value in the
conguration phase.
FlexRay block: Updates the message buffer header index after successful reception.
Application: Provides initial message buffer header index.