M16C26 Datasheet, PDF (175/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

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Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative
Programmable I/O Ports
and
subject to change.
SINGLE-CHIP 16-BIT
M16C/26 Group
CMOS MICROCOMPUTER
Pull-up control register 0
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR0
Address
03FC16
When reset
000000002
Bit symbol
Bit name
Function
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
The corresponding port is pulled
high with a pull-up resistor
0 : Not pulled high
1 : Pulled high
Nothing is assigned.
In an attempt to write to these bits, write 0. The value, if read, turns out to be 0.
RW
Pull-up control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
PUR1
Address
03FD16
When reset
000000002
Bit symbol
Bit name
Function
RW
Nothing is assigned.
In an attempt to write to these bits, write 0. The value, if read, turns out to be 0.
PU14
PU15
PU16
PU17
P60 to P63 pull-up
The corresponding port is pulled
P64 to P67 pull-up
high with a pull-up resistor
0 : Not pulled high
P72 to P73 pull-up (Note 1) _{1 : Pulled high}
P74 to P77 pull-up
Note 1: Since P70 and P71 are N-channel open drain ports, 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
000000002
Bit symbol
Bit name
Function
PU20
PU21
PU22
P80 to P83 pull-up
P85 to P87 pull-up
P90 to P93 pull-up
The corresponding port is pulled
high with a pull-up resistor
0 : Not pulled high
1 : Pulled high
Nothing is assigned.
In an attempt to write to these bits, write 0. The value, if read, turns out to be 0.
PU24
PU25
P100 to P103 pull-up
P104 to P107 pull-up
0 : Not pulled high
1 : Pulled high
Nothing is assigned.
In an attempt to write to these bits, write 0. The value, if read, turns out to be 0.
RW
Figure 1.17.7. Pull-up Control registers
Renesas Technology Corp.
169