UPD17227 查看數據表（PDF） - NEC => Renesas Technology

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UPD17227

4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

NEC => Renesas Technology 

µPD17225, 17226, 17227, 17228

3.8 Specifying Pull-up Resistor Connection

Whether or not a pull-up resistor is connected to port P0E can be specified by the following registers of the register

file in 1-bit units when the port is in the input modeNote.

3

2

1

0

P0EBPU3 P0EBPU2 P0EBPU1 P0EBPU0

Address:

RF : 17H

On reset:

0H

R/W:

R/W

P0EBPU0 Connects Pull-Up Resistor to P0E0

0

Not connected

1

Connected

P0EBPU1 Connects Pull-Up Resistor to P0E1

0

Not connected

1

Connected

P0EBPU2 Connects Pull-Up Resistor to P0E2

0

Not connected

1

Connected

P0EBPU3 Connects Pull-Up Resistor to P0E3

0

Not connected

1

Connected

Note To disconnect the pull-up resistor in the output mode, clear the corresponding bit of the P0EBPU register.

28

Data Sheet U12643EJ2V0DS00

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