PXN20RM Datasheet, PDF (1007/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Enhanced Serial Communication Interface (eSCI)
Field
P[1:0]
ID[5:0]
LEN
CSM
CSE
CRC
TD
TO
DATA
Table 31-11. eSCI_LTR Field Descriptions
Description
Identifier Parity. This field provides the identifier parity that is used to create the protected identifier if the
automatic identifier parity generation is disabled, i.e., the PRTY bit in the eSCI LIN Control Register 1
(eSCI_LCR1) is 0.
Identifier. This field is used for the identifier field in the protected identifier.
Frame Length. This field defines the number of data bytes to be transmitted or received.
Checksum Model. This bit controls the checksum calculation model used.
0 Classic Checksum Model (LIN 1.3).
1 Enhanced Checksum Model (LIN 2.0).
Checksum Enable. This bit control the generation and checking of the checksum byte.
0 No generation and checking of checksum byte.
1 Generation and checking of checksum byte.
CRC Enable. This bit controls the generation of checking standard or enhanced LIN frames, which are described
in Section 31.4.6.2, LIN Frame Formats.
0 Standard LIN frame generation and checking.
1 Enhanced LIN frame generation and checking.
Transfer Direction. This bit control the transfer direction of the data, CRC, and checksum byte fields.
0 Data, CRC, and Checksum byte fields received, described in Section 31.4.6.4, LIN RX Frame Generation.
1 Data, CRC, and Checksum byte fields transmitted, described in Section 31.4.6.3, LIN TX Frame Generation.
Timeout Value. The content of the field depends on the transfer direction.
RX frame: Defines the time available for a complete RX frame transfer, as described in Section 31.4.6.5.5,
Slave-Not-Responding-Error Detection.
TX frame: Must be set to 0.
Transmit Data. Data bits for transmission.
31.3.2.10 eSCI LIN Receive Register (eSCI_LRR)
This register provides the data bytes of received LIN RX frames.
Offset: ESCI_BASE + 0x0014
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
D
0
0
0
0
0
0
0
0
W
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 31-12. eSCI LIN Receive X Register (eSCI_LRR)
Table 31-12. LINRX Field Descriptions
Field
D
Description
Receive Data. This field provides the data bytes of received LIN RX frames.
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
31-17