tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 118

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

8.3 I/O Port Registers
8. I/O Ports
RA005
Port P2 built-in pull-up resistor control
Port P2 input data
(0x0F29)
(0x000F)
P2PRD
P2PU
Note: * : Don’t care
Note: i = 0 to 2, 5 to 7
Function
Read/Write
Read/Write
Bit Symbol
Bit Symbol
After reset
After reset
Function
0:
1:
The built-in pull-up resistor is not con-
nected.
The built-in pull-up resistor is connected.
(The resistor is connected only when the
port is used in the input mode or as the
open drain output. Under any other con-
ditions, setting to "1" does not make the
resistor connected.)
If the port is used in the input mode or as
the open drain output, the contents of the
port are read. If not, "0" is read.
P2PRD7
P2PU7
R/W
R
7
0
7
*
Table 8-9 P2PRD Read Value (P20 to P22, P25 to P27)
P2CRi
0
1
1
P2PRD6
Set condition
P2PU6
R/W
R
6
0
6
*
P2OUTCRi
0
1
*
P2PRD5
P2PU5
R/W
R
5
0
5
*
Page 104
The contents of the port
are read without condition.
P2PRD4
P2PRDi read value
Contents of port
Contents of port
R
R
4
0
4
-
*
"0"
P2PRD3
R
R
3
0
3
*
-
The built-in pull-up resistor is not con-
nected.
The built-in pull-up resistor is connected.
(The resistor is connected only when the
port is used in the input mode or as the
open drain output. Under any other con-
ditions, setting to "1" does not make the
resistor connected.)
If the port is used in the input mode or as
the open drain output, the contents of the
port are read. If not, "0" is read.
P2PRD2
P2PU2
R/W
R
2
0
2
*
P2PRD1
P2PU1
R/W
R
1
0
1
*
TMP89FM42
P2PRD0
P2PU0
R/W
R
0
0
0
*