Fujitsu FR81S User Manual
CHAPTER 11: I/O PORTS
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : I/O PORTS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
55
5.1.6. Port Function (Output) Assignment
The port function (Output) assignment is shown below.
Preparation
⋅
For a pin with the AD converter function, set the applicable bit in the analog input enable register
(ADER) of the AD converter to "Port I/O mode". For information on the setting method, see
"CHAPTER: A/D CONVERTER".
(1)Set the PFR to enable the port function.
(2)Set the DDR for output.
Figure 5-7 Port Function (Output) Assignment Procedure
EPFR
PFR
PDR
DDR
EPFR
PDDR
Peripheral
output value
External bus
Output value
Pin
Peripheral I/O
direction control
External bus I/O
direction control
To peripheral
input value
To input I/O relocation selection circuit
Input I/O relocation selection circuit
To external bus input value
Input value from each pins
To peripheral input value
(1)
(2)
MB91520 Series
MN705-00010-1v0-E
450