M16C62N Datasheet, PDF (149/213 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Programmable I/O Port
Mitsubishi microcomputers
M16C / 62N Group (80-pin)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Pull-up control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR0
Address
03FC16
When reset
0016
Bit symbol
Bit name
Function
RW
PU00
PU01
PU02
PU03
P00 to P03 pull-up
P04 to P07 pull-up
P10 to P13 pull-up
P14 to P17 pull-up
The corresponding port is pulled
high with a pull-up resistor
0 : Not pulled high
1 : Pulled high
PU04
P20 to P23 pull-up
PU05
P24 to P27 pull-up
PU06
P30 to P33 pull-up
PU07
P34 to P37 pull-up
Note: P1 is not connected to external pins, but are present within the microcomputer, so
set the unused pin processing.
Pull-up control register 1 (Note 2)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR1
Address
03FD16
When reset
0016
Bit symbol
Bit name
Function
RW
PU10
PU11
PU12
PU13
P40 to P43 pull-up
P44 to P47 pull-up
P50 to P53 pull-up
P54 to P57 pull-up
The corresponding port is pulled
high with a pull-up resistor
0 : Not pulled high
1 : Pulled high
PU14
P60 to P63 pull-up
PU15
P64 to P67 pull-up
PU16
P72 to P73 pull-up (Note 1)
PU17
P74 to P77 pull-up
Note 1: Since P70 and P71 are N-channel open drain ports, pull-up is not available for them.
Note 2: P44 to P47, P72 to P75 are not connected to external pins, but are present within the
microcomputer, so set the unused pin processing.
Pull-up control register 2 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR2
Address
03FE16
When reset
0016
Bit symbol
PU20
PU21
PU22
PU23
PU24
Bit name
P80 to P83 pull-up
P84 to P87 pull-up
(Except P85)
P90 to P93 pull-up
P94 to P97 pull-up
P100 to P103 pull-up
Function
The corresponding port is pulled
high with a pull-up resistor
0 : Not pulled high
1 : Pulled high
RW
PU25
P104 to P107 pull-up
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Note: P91 is not connected to external pins, but are present within the microcomputer, so
set the unused pin processing.
Figure 1.18.8. Pull-up control register
148