Fujitsu FR81S User Manual
CHAPTER 11: I/O PORTS
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : I/O PORTS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
61
5.5. Input blocked by GPORTEN
The input blocked function by GPORTEN is explained below.
The majority of pins become the input blocked to avoid the change of the penetration current before the port
is set with software at power-on reset. See "D. Pin Status in CPU Status" in " APPENDIX " for the pin that
becomes input blocked. See "4.7. PORTEN (PORT ENable register)"for the method of releasing the input
blocked state.
MB91520 Series
MN705-00010-1v0-E
456