Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
109
4.4.15.
LIN Assist Mode Error Status Register: LAMESR
LIN assist mode error status register (LAMESR) checks those flags of the LIN checksum error, the LIN ID
parity error, the LIN Sync Data error, and the LIN bus error.
• LAMESRn(n=0 to 11) : Address Base addr + 18
H
(Access: Byte, Half-word,
Word)
7
6
5
4
3
2
1
0
bit
-
LCSER LPTER LSFER LBSER
-
-
-
0
0
0
0
0
0
0
0
Initial value
R0,W0
R/W
R/W
R/W
R/W
R0,W0 R0,W0 R0,W0
Attribute
[bit7] Reserved bit
This is a reserved bit. The read value is "0". Be sure to write "0" to this bit.
[bit6] LCSER: LIN checksum error flag bit
When the LIN checksum error occurs, this bit is set to "1".
Be sure to write "0" in order to clear this error flag bit.
When the LCSER bit and the LCSERIE bits are set to "1", the reception interrupt request is outputted.
LCSER
LIN checksum error flag
write
read
0
Clear error flag
No error
1
No influence
Error
Notes:
⋅
Function of this register is effective only in the LIN assist mode (LAMCR:LAMEN="1").
⋅
When this register is accessed in accordance with read-modify-write instructions, "1" is read.
⋅
Even if a framing error is detected, the result of the checksum arithmetic operation is indicated. The
result, however, is not guaranteed.
[bit5] LPTER: LIN ID parity error flag bit
When the LIN ID parity error is generated, it is set to "1".
Be sure to write "0" in order to clear this error flag bit.
When the LPTER bit and the LPTERIE bits are set to "1", the reception interrupt request is outputted.
When this flag is read and found to be "1", the reception ID data is invalid.
When the reception FIFO is being used, the enable bit of reception FIFO is cleared while this flag is being
set. As a result, the received ID Field data is not stored in the reception FIFO.
LPTER
LIN ID parity error flag
write
read
0
Clear error flag
No error
1
No influence
Error
MB91520 Series
MN705-00010-1v0-E
1422