NXP Semiconductors PXN2020, Reference Manual, Page: 670 / 1376

FlexRay Communication Controller (FlexRAY)
PXN20 Microcontroller Reference Manual, Rev. 1
26-56 Freescale Semiconductor
26.5.2.50 Receive Shadow Buffer Index Register (RSBIR)
This register is used to provide and retrieve the indices of the message buffer header fields currently
associated with the receive shadow buffers. For more details on the receive shadow buffer concept, refer
to
Section 26.6.6.3.5, Receive Shadow Buffers Concept.
26.5.2.51 Receive FIFO System Memory Base Address Register (RFSYMBADR)
Table 26-58. MTSBCFR Field Descriptions
Field Description
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.
CYCCNTMSK Cycle Counter Mask — This field provides the filter mask for the MTS cycle count filter.
CYCCNTVAL Cycle Counter Value — This field provides the filter value for the MTS cycle count filter.
Base + 0x0084 16-bit write access required Write: WMD, SEL: Any Time
RSBIDX: POC:config
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0 0
SEL
0 0 0 0
RSBIDX
W WMD
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 26-50. Receive Shadow Buffer Index Register (RSBIR)
Table 26-59. RSBIR Field Descriptions
Field Description
WMD Write Mode — This bit controls the write mode for this register.
0 update SEL and RSBIDX field on register write
1 update only SEL field on register write
SEL Selector — This field 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.
RSBIDX Receive Shadow Buffer Index — This field contains the current index of the message buffer header field of the
receive shadow message buffer selected by the SEL field. The controller uses this index to determine the
physical location of the shadow buffer header field in the FlexRay memory. The controller will update this field
during receive operation.The application provides initial message buffer header index value in the configuration
phase.
controller: Updates the message buffer header index after successful reception.
Application: Provides initial message buffer header index.