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CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U13420EJ2V0UM00
(2) Pull-up resistor option registers (PU0, PU2 to PU9)
This register is used to set whether to use an internal pull-up resistor at each port or not. An on-chip pull-up
resistor for each port pin can be specified by setting PU0, and PU2 to PU9.
PU0 and PU2 to PU9 are set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets this register to 00H.
Caution
When an on-chip pull-up resistor is used, even if output mode is set, the pull-up resistor will
not be cut off.
To use in output mode, set the corresponding pull-up resistor option registers to 0.
Содержание mPD780065 Series
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