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SCI/LIN Control Registers

28.7.27 LIN Identification Register (LINID)

Figure 28-56 and Table 28-44 illustrate this register.

Figure 28-56. LIN Identification Register (LINID) (offset = 70h)

31 24 23 16

Reserved RECEIVED ID

R-0 R-0

15 8 7 0

ID-SlaveTask BYTE ID BYTE

R/WL-0 R/WL-0

LEGEND: R/W = Read/Write; R = Read only; WL = Write in LIN mode only; -n = value after reset

Table 28-44. LIN Identification Register (LINID) Field Descriptions

Bit Field Value Description

31-24 Reserved 0 Reads return 0. Writes have no effect.

23-16 RECEIVED ID 0-FFh Received identification. These bits are effective in LIN mode only. This byte contains the

current message identifier. During header reception the received ID is copied from the

SCIRXSHF register to this byte if there is no ID-parity error and there has been an RX/TX

match.

15-8 ID-SLAVETASK BYTE 0-FFh ID-SlaveTask Byte. These bits are effective in LIN mode only. This field contains the

identifier to which the received ID of an incoming header will be compared to decide

whether a receive response, a transmit response, or no action needs to be performed by

the LIN node when a header with that particular ID is received.

7-0 ID BYTE 0-FFh ID byte. This field is effective in LIN mode only. This byte is the LIN mode message ID.

On a master node, a write to this register by the CPU initiates a header transmission. For

a slave task, this byte is used for message filtering when HGENCTRL = 0.

NOTE: For software compatibility with future LIN modules the HGEN CTRL bit must be set to 1, the

RX ID MASK must be set to FFh and the TX ID MASK must be set to FFh.

1433

SPNU562–May 2014 Serial Communication Interface (SCI)/Local Interconnect Network (LIN)

Module

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