Fujitsu FR81S ユーザーズマニュアル
CHAPTER 11: I/O PORTS
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : I/O PORTS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
62
5.6. Notes on Pins with the AD Converter Function
Notes on pins with the AD converter function are shown below.
When using a pin with the AD converter function to perform a different function, set the relevant bit of the
AD converter analog input enable register (ADER) to "Port I/O mode" in advance. For information on the
setting method, see "CHAPTER: A/D CONVERTER". If analog input is enabled, inputs from ports and
from peripheral functions are fixed at "0" and outputs are fixed at Hi-Z regardless of the port function
register (PFR00 to PFR13) and extended port function register (EPFR00 to EPFR55) settings.
MB91520 Series
MN705-00010-1v0-E
457