M16C26A Datasheet, PDF (242/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/26A Group (M16C/26A, M16C/26B, M16C/26T)
16. Programmable I/O Ports
Pull-up control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR0
Address
03FC16
After reset
0016
Bit symbol
Bit name
Function
RW
(b2-b0)
Nothing is assigned. In an attempt to write to these bits, write
“0”. The value, if read, turns out to be “0”.
PU03
P15 to P17 pull-up
0 : Not pulled high
1 : Pulled high ⁽¹⁾
RW
(b7-b4)
Nothing is assigned. In an attempt to write to these bits, write
“0”. The value, if read, turns out to be “0”.
NOTE:
1. The pin for which this bit is “1” (pulled high) and the direction bit is “0” (input mode) is pulled high.
Pull-up control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR1
Address
03FD16
After reset
00000000 2
Bit symbol
Bit name
Function
RW
(b3-b0)
Nothing is assigned. In an attempt to write to these bits, write
“0”. The value, if read, turns out to be “0”.
PU14
P60 to P63 pull-up
0 : Not pulled high
RW
PU15
P64 to P67 pull-up
1 : Pulled high ⁽¹⁾
RW
PU16
P70 to P73 pull-up
RW
PU17
P74 to P77 pull-up
RW
NOTE:
1. The pin for which this bit is “1” (pulled high) and the direction bit is “0” (input mode) is pulled high.
Pull-up control register 2
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR2
Address
03FE16
After reset
0016
Bit symbol
Bit name
Function
RW
PU20
P80 to P83 pull-up
0 : Not pulled high
RW
PU21
P84 to P87 pull-up
1 : Pulled high ⁽¹⁾
RW
PU22
P90 to P93 pull-up
RW
Nothing is assigned. In an attempt to write to these bits, write
(b3)
“0”. The value, if read, turns out to be “0”.
PU24
P100 to P103 pull-up
0 : Not pulled high
RW
PU25
P104 to P107 pull-up
1 : Pulled high ⁽¹⁾
RW
(b7-b6)
Nothing is assigned. In an attempt to write to these bits, write
“0”. The value, if read, turns out to be “0”.
NOTE:
1. The pin for which this bit is “1” (pulled high) and the direction bit is “0” (input mode) is pulled high.
Figure 16.3.1. PUR0 to PUR2 Registers
Rev. 2.00 Feb.15, 2007 ^{page 225} of 329
REJ09B0202-0200