MPC5604B/C Microcontroller Reference Manual, Rev. 8
Freescale Semiconductor 401
21.7.1.14 Buffer identifier register (BIDR)
IOPE Idle on Identifier Parity Error
0 Identifier Parity error does not reset LIN state machine.
1 Identifier Parity error reset LIN state machine.
This bit can be set/cleared in Initialization mode only.
WURQ Wake-up Generation Request
Setting this bit generates a wake-up pulse. It is reset by hardware when the wake-up character
has been transmitted. The character sent is copied from DATA0 in BDRL buffer. Note that this bit
cannot be set in Sleep mode. Software has to exit Sleep mode before requesting a wake-up. Bit
error is not checked when transmitting the wake-up request.
DDRQ Data Discard Request
Set by software to stop data reception if the frame does not concern the node. This bit is reset by
hardware once LINFlex has moved to idle state. In Slave mode, this bit can be set only when HRF
bit in LINSR is set and identifier did not match any filter.
DTRQ Data Transmission Request
Set by software in Slave mode to request the transmission of the LIN Data field stored in the Buffer
data register. This bit can be set only when HRF bit in LINSR is set.
Cleared by hardware when the request has been completed or aborted or on an error condition.
In Master mode, this bit is set by hardware when BIDR[DIR] = 1 and header transmission is
completed.
ABRQ Abort Request
Set by software to abort the current transmission.
Cleared by hardware when the transmission has been aborted. LINFlex aborts the transmission
at the end of the current bit.
This bit can also abort a wake-up request.
It can also be used in UART mode.
HTRQ Header Transmission Request
Set by software to request the transmission of the LIN header.
Cleared by hardware when the request has been completed or aborted.
This bit has no effect in UART mode.
Offset: 0x0034 Access: User read/write
0123456789101112131415
R 0000000000000000
W
Reset0000000000000000
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
DFL DIR CCS
00
ID
W
Reset0000000000000000
Figure 21-19. Buffer identifier register (BIDR)
Table 21-19. LINCR2 field descriptions (continued)
Field Description
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