Fujitsu FR81S Benutzerhandbuch
CHAPTER 11: I/O PORTS
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : I/O PORTS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
65
5.9.
Operation at Wake Up from Power Shutdown
The operation at wake up from the power shutdown is shown below.
When PMUCTLR:IOCTMD bit is set, the I/O state is kept during the wake up sequence from the power
shutdown. The maintenance of the I/O state continues until PMUCTLR:IOCT is set.
When PMUCTLR:IOCTMD bit is cleared , the maintenance is effective during the wake up sequence. The
register setting of the I/O port shall be effective after the wake-up completion.
On waking up from power shutdown, there is a case that the maintenance of the I/O latch is not released.
After waking up from power shutdown, PMUCTLR.IOCT bit must be written "1" for releasing the
maintenance of I/O
MB91520 Series
MN705-00010-1v0-E
460