Fujitsu FR81S User Manual
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
97
4.4.8.
Sync Field Upper Limit Register: SFUR
The Sync Field upper limit register (SFUR) is used to set the upper limit of the value which can be set to the
baud rate generator register for automatic baud rate adjustment.
SFURn(n=0 to 11) : Address Base addr + 0E
H
(Access: Byte, Half-word, Word)
15
14
13
12
11
10
9
8
bit
-
TU14
TU13
TU12
TU11
TU0
TU9
TU8
0
0
0
0
0
0
0
0
Initial value
R0,WX
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Attribute
7
6
5
4
3
2
1
0
bit
TU7
TU6
TU5
TU4
TU3
TU2
TU1
TU0
0
0
0
0
0
0
0
0
Initial value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Attribute
[bit15] Undefined
The read value is "0". Writing has no effect on the operation.
[bit14 to bit0] TU14-0: Upper limit bits
These bits are used to set the upper limit of the value which can be set to the baud rate generator register
(BGR) for automatic baud rate adjustment.
When the automatic baud rate adjustment bit (SACSR:AUTE) is set to "1" and the slave mode is selected
(SCR:MS="1"), the value of the serial timer register (STMR) will be set to the baud rate generator register
(BGR), if the value of the serial timer register (STMR) after Sync Field is received is smaller than these bits
and larger than the Sync Field lower limit register (SFLR).
Note:
These bits can be changed when the automatic baud rate adjustment bit (SACSR:AUTE) is set to "0".
MB91520 Series
MN705-00010-1v0-E
1410