UPD78F1502AGK-GAK-AX Datasheet, PDF (204/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 4 PORT FUNCTIONS
(3) Pull-up resistor option registers (PUxx)
These registers specify whether the on-chip pull-up resistors 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 these registers. On-chip pull-up resistors cannot be connected to bits set to output mode and bits
used as alternate-function output pins, regardless of the settings of these registers.
These registers can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears these registers to 00H.
Figure 4-44. Format of Pull-up Resistor Option Register (78K0R/LF3)
Symbol
7
6
5
4
3
2
1
0
Address After reset R/W
PU0
0
0
0
0
0
PU02 PU01 PU00 F0030H
00H
R/W
PU1
0
0
PU15 PU14 PU13 PU12 PU11 PU10 F0031H
00H
R/W
PU3
0
0
0
0
PU33 PU32 PU31 PU30 F0033H
00H
R/W
PU4
0
0
0
0
0
0
PU41 PU40 F0034H
00H
R/W
PU5
PU57 PU56 PU55 PU54 PU53 PU52 PU51 PU50 F0035H
00H
R/W
PU9
0
0
0
0
0
PU92 PU91 PU90 F0039H
00H
R/W
PU10
0
0
0
0
0
0
0
PU100 F003AH
00H
R/W
PU12
0
0
0
0
0
0
0
PU120 F003CH
00H
R/W
PU14 PU147 PU146 PU145 PU144 PU143 PU142 PU141 PU140 F003EH
00H
R/W
PUmn
0
1
Pmn pin on-chip pull-up resistor selection
(m = 0, 1, 3 to 5, 9, 10, 12, 14 ; n = 0 to 7)
On-chip pull-up resistor not connected
On-chip pull-up resistor connected
R01UH0004EJ0501 Rev.5.01
188
Jun 20, 2011