upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 94

• Manufacturer Part Number: upd78f0114hgb-8es-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(3) Pull-up resistor option registers (PU0, PU1, PU3, PU7, and PU12)
94
Symbol
PU12
PU0
PU1
PU3
PU7
These registers specify whether the on-chip pull-up resistors of P00, P01, P10 to P17, P30 to P33, P70 to P73, or
P120 are to be used or not. On-chip pull-up resistors can be used in 1-bit units only for the bits set to input mode
of the pins to which the use of an on-chip pull-up resistor has been specified in PU0, PU1, PU3, PU7, and PU12.
On-chip pull-up resistors cannot be connected for bits set to output mode and bits used as alternate-function
output pins, regardless of the settings of PU0, PU1, PU3, PU7, and PU12.
These registers can be set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears these registers to 00H.
PU17
PUmn
7
0
7
7
0
7
0
7
0
0
1
On-chip pull-up resistor not connected
On-chip pull-up resistor connected
PU16
6
0
6
6
0
6
0
6
0
Figure 4-18. Format of Pull-up Resistor Option Register
PU15
5
0
5
5
0
5
0
5
0
PU14
4
0
4
4
0
4
0
4
0
CHAPTER 4 PORT FUNCTIONS
User’s Manual U16961EJ4V0UD
PU13
PU33
PU73
Pmn pin on-chip pull-up resistor selection
3
0
3
3
3
3
0
(m = 0, 1, 3, 7, 12; n = 0 to 7)
PU12
PU32
PU72
2
0
2
2
2
2
0
PU01
PU11
PU31
PU71
1
1
1
1
1
0
PU120
PU00
PU10
PU30
PU70
0
0
0
0
0
Address
FF3CH
FF30H
FF31H
FF33H
FF37H
After reset
00H
00H
00H
00H
00H
R/W
R/W
R/W
R/W
R/W
R/W