M16C1N Datasheet, PDF (173/238 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/10 SERIES

M16C/1N Group
17. Programmable I/O Ports
Pull-up control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR0
Address
00FC16
When reset
00X000002
Bit symbol
PU00
PU01
PU02
Bit name
P00 to P03 pull-up
P04 to P07 pull-up
P10 to P13 pull-up
Function
RW
The corresponding port is pulled RW
high with a pull-up resistor
0 : Not pulled high
RW
1 : Pulled high
RW
PU03
P14 to P17 pull-up
RW
PU04
P20 to P21 pull-up
RW
Nothing is assigned.
In an attempt to write to these bits, write "0". The value, if read, turns out to
be indeterminate.
PU06
PU07
P30 to P33 pull-up
P34 to P37 pull-up
The corresponding port is pulled _RW
high with a pull-up resistor
0 : Not pulled high
1 : Pulled high
RW
Pull-up control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR1
Address
00FD16
When reset
XXXXX0002
Bit symbol
Bit name
Function
RW
PU10
PU11
PU12
P40 to P43 pull-up
P44 to P47 pull-up
P50 to P52 pull-up
The corresponding port is pulled _RW
high with a pull-up resistor
0 : Not pulled high
RW
1 : Pulled high
RW
Nothing is assigned.
In an attempt to write to these bits, write "0". The value, if read, turns out to
be indeterminate.
Port P1 drive capacity control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DRR
Address
00FE16
When reset
0016
Bit symbol
Bit name
Function
RW
DRR0 Port P10 drive capacity
Set P1 N-channel output
RW
DRR1 Port P11 drive capacity
transistor drive capacity
RW
DRR2 Port P12 drive capacity
0 : LOW
1 : HIGH
RW
DRR3 Port P13 drive capacity
RW
DRR4 Port P14 drive capacity
RW
DRR5 Port P15 drive capacity
RW
DRR6 Port P16 drive capacity
RW
DRR7 Port P17 drive capacity
RW
Figure 17.7 Pull-up control register 0, Pull-up control register 1 and Port P1 drive capacity control
register
Rev.1.00 Oct 20, 2004 page 161 of 222
REJ09B0007-0100Z