Fujitsu FR81S User Manual
CHAPTER 11: I/O PORTS
4. Registers
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : I/O PORTS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
32
4.6.9. Extended Port Function Register 28 : EPFR28
The bit configuration of extended port function register 28 is shown.
This register is used to enable free-run timer clock input. (I/O multiplexing)
EPFR28 : Address 0E7C
H
(Access : Byte, Half-word, Word)
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Reserved
FRCK5E FRCK4E FRCK3E Reserved FRCK1E Reserved
Initial value
1
1
0
0
0
1
0
1
Attribute R1,WX
R1,WX
R/W
R/W
R/W
R1,WX
R/W
R1,WX
[bit1] FRCK1E : Free-run timer ch.1 clock input selection
[bit3] FRCK3E : Free-run timer ch.3 clock input selection
[bit4] FRCK4E : Free-run timer ch.4 clock input selection
[bit5] FRCK5E : Free-run timer ch.5 clock input selection
FRCKnE (n=1,3 to 5)
Operation
0
Input from the FRCKn_0 (Initial value)
1
Input from the FRCKn_1
MB91520 Series
MN705-00010-1v0-E
427