Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
111
4.4.16.
LIN Assist Mode Trouble Examination Register:
LAMERT
LIN assist mode trouble examination register (LAMERT) sets a pseudo trouble of the framing error, the
LIN bus error, the LIN Sync Field error, the LIN ID parity error, and the LIN checksum error by setting the
key code control bit and the pseudo trouble setting bit.
• LAMERTn(n=0 to 11) : Address Base addr + 19
H
(Access: Byte, Half-word,
Word)
7
6
5
4
3
2
1
0
bit
KEY1
KEY0
-
LCSERT LPTERT LSFERT LBSERT FRET
0
0
0
0
0
0
0
0
Initial value
R0,W
R0,W
R0,W0
R/W
R/W
R/W
R/W
R/W
Attribute
[bit7, bit6] KEY1, KEY0: Key code control bit
These key code bits make the following pseudo trouble settings effective:
⋅
Framing error pseudo trouble setting bit (FRET)
⋅
LIN bus error pseudo trouble setting bit (LBSERT)
⋅
LIN Sync Field error pseudo trouble setting bit (LSFERT)
⋅
LIN ID parity error pseudo trouble setting bit (LPTERT)
⋅
LIN checksum error pseudo trouble setting bit (LCSERT)
When setting a pseudo trouble, write to these bits in accordance with the following procedures:
1. KEY1-0="00"+ the pseudo trouble setting value is written.
2. KEY1-0="01"+ the pseudo trouble setting value (the same value as before) is written.
3. KEY1-0="10"+ the pseudo trouble setting value (the same value as before) is written.
4. KEY1-0="11"+ the pseudo trouble setting value (the same value as before) is written.
5. When being written in the fourth time, the pseudo trouble setting value becomes effective.
When above mentioned setup procedures are not followed, writing to these two bits becomes invalid in the
following cases:
⋅
When other register is written or read in the middle of the writing procedures.
⋅
When the value read is not correct.
⋅
When these two bits are written in the middle of the writing procedures.
When releasing the pseudo trouble setting, follow the procedures similar to those to set.
As for the read value, "0" is read.
Note:
When the following error occurs in assist mode, the assist mode will stop.
⋅
LIN bus error
⋅
LIN framing error
⋅
LIN Sync Data error
⋅
LIN ID parity error
⋅
LIN checksum error
MB91520 Series
MN705-00010-1v0-E
1424