mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 550

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 13 FlexRay Communication Controller (FLEXRAY)
For transmit message buffers assigned to the dynamic segment, the PLDLEN value must be less than or
equal to the value of the max_payload_length_dynamic field in the
(PCR24). If this is not fulfilled, the dynamic payload length error flag DPL_EF in the
Register (CHIERFR)
syntactically and semantically correct dynamic frame with PLDLEN payload words and the payload
length field in the frame header set to PLDLEN.
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Field
NUF
SYF
SUF
PPI
FID
R*
Reserved Bit — This bit corresponds to the
Note: For protocol compliant operation, this control bit must be set to 0 for transmit message buffers.
Payload Preamble Indicator — This bit corresponds to the
header.
0 No network management vector or message ID in frame payload data
1 Static Segment: Frame payload data contains network management vector
Null Frame Indicator — This bit corresponds to the
0 Null frame received
1 Normal frame received
Sync Frame Indicator — This bit corresponds to the
Startup Frame Indicator — This bit corresponds to the
Frame ID
Note: For transmit message buffers, the application must program this field to the same value as in the
• For receive and FIFO message buffers, this is a status bit and represents the value of the Reserved bit in the
• For transmit message buffers, this is a control bit. The FlexRay block transmits this within the frame header.
• For receive and FIFO message buffers, this is a status bit and represents the value of the
• For transmit message buffers, this is a control bit. The FlexRay block uses this value to set the
• For receive message buffers and receive FIFOs, this is a status bit and represents the value of the
• For transmit message buffers, the value of this bit is ignored. The FlexRay block determines internally whether
• For receive message buffers and receive FIFOs, this is a status bit and represents the value of the
• For transmit message buffers, the value of this bit is ignored. The FlexRay block determines internally whether
• For receive message buffers and receive FIFOs, this is a status bit and represents the value of the
• For transmit message buffers, the value of this bit is ignored. The FlexRay block determines internally whether
• For receive message buffers and receive FIFOs, this field provides the value of the
• For transmit message buffers, this field provides the value that will be transmitted in the
frame received on the FlexRay bus in the corresponding slot.
Indicator
Preamble Indicator
Dynamic Segment: Frame payload data contains message ID
Indicator
a null frame or non-null frame must be transmitted and sets the
Indicator
a sync frame must be transmitted and sets the
Frame Indicator
a startup frame must be transmitted and sets the
valid frame received on the FlexRay bus in the slot indicated by the CYCCNT field.
FlexRay frame.
corresponding
while transmitting the frame header, it will set the frame ID error flag FID_EF in the
(CHIERFR). The value of the FID field will be ignored and replaced by the value provided in the
Buffer Frame ID Registers
is set when the message buffer is under transmission. The PE generates a
of the first valid frame received on the FlexRay in the slot indicated by the CYCCNT field.
of the first valid frame received on the FlexRay bus in the slot indicated by the CYCCNT field.
of the first valid frame received on the FlexRay bus in the slot indicated by the CYCCNT field.
of the first valid frame received on the FlexRay bus in the slot indicated by the CYCCNT field
Table 13-84. Frame Header Field Descriptions
Message Buffer Frame ID Registers
in the frame header of the frame to transmit.
MC9S12XF - Family Reference Manual, Rev.1.19
(MBFIDRn).
Reserved bit
Description
Sync Frame Indicator
Startup Frame Indicator
Null Frame Indicator
Sync Frame Indicator
Startup Frame Indicator
(MBFIDRn). If the FlexRay block detects a mismatch
in the FlexRay frame header.
Payload Preamble Indicator
Protocol Configuration Register 24
Null Frame Indicator
accordingly.
in the FlexRay frame header.
in the FlexRay frame header.
accordingly.
in the FlexRay frame header.
Frame ID
Freescale Semiconductor
accordingly.
CHI Error Flag Register
CHI Error Flag
in the FlexRay frame
Frame ID
Payload Preamble
field of the first
Payload
Sync Frame
Null Frame
field of the
Message
Startup