Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
110
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.
.
[bit4] LSFER: LIN Sync Data error flag bit
When the LIN Sync Data error occurs, it is set to "1".
Be sure to write "0" in order to clear this error flag bit.
When the LSFER bit and the LSFERIE bits are set to "1", the reception interrupt request is outputted.
LPFER
LIN Sync Data 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
⋅
This function detects an error only at automatic baud rate adjustment disabled (SACSR:AUTE="0") in
slave mode (SCR:MS=1).
⋅
Even if a framing error is detected at automatic baud rate adjustment disabled (SACSR:AUTE="0"), the
result of the Sync Field value (0x55) collation is indicated. The result, however, is not guaranteed.
[bit3] LBSER: LIN bus error flag bit
When the LIN bus error occurs, this bit is set to "1".
Be sure to write "0" in order to clear this error flag bit.
When the LBSER bit and the LBSERIE bits are set to "1", the reception interrupt request is outputted.
When this flag is read and found to be "1" in ID Field and the data field, the data of reception data register
(RDR) is invalid.
LBSER
LIN bus 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.
⋅
When a bus error is detected in the ID Field, the LIN ID parity error is detected as well.
⋅
When a bus error is detected by checksum, the LIN checksum error is detected as well.
[bit2 to bit0] Reserved bit
This is a reserved bit. The read value is "0". Be sure to write "0" to this bit.
MB91520 Series
MN705-00010-1v0-E
1423