M16C6K9 Datasheet, PDF (233/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Port
Pull-up control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR0
Address
03FC16
Bit symbol
PU00
PU01
PU02
PU03
PU04
PU05
PU06
PU07
Bit name
P00 to P03 pull-up
P04 to P07 pull-up
P10 to P13 pull-up
P14 to P17 pull-up
P20 to P23 pull-up
P24 to P27 pull-up
P30 to P33 pull-up
P34 to P37 pull-up
When reset
0016
Function
The corresponding port is pulled
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
03FD16
When reset
0016
Bit symbol
Bit name
Function
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
Nothing is assigned. (Note)
Can't write to this bit. The value, if read, turns out to be “0”.
RW
PU15
P64 to P67 pull-up
Nothing is assigned. (Note)
Can't write to this bit. The value, if read, turns out to be “0”.
Note.Since P60 to P63 and P70 to P77 are N-channel open drain ports, internal pull-up is not
available for them.
Pull-up control register 2
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR2
Address
03FE16
When reset
0016
Bit symbol
Bit name
Function
RW
Nothing is assigned. (Note)
Can't write to this bit. The value, if read, turns out to be “0”.
PU21
PU22
PU23
P86, P87 pull-up(Note)
P90 to P93 pull-up
P94 to P97 pull-up
The corresponding port is pulled
high with a pull-up resistor
0: Not pulled high
1: Pulled high
Nothing is assigned.
Can't write to this bit. The value, if read, turns out to be “0”.
Note.Since P80 to P84 are N-channel open drain ports, internal pull-up is not available for them.
And P85 is input port only , also no internal pull-up is available.
Fig.UA-9 Pull-up control register(1)
Rev.1.00 Jun 06, 2003 page 233 of 290