MC81F4x16
PUR1
R1 PORT PULL-UP ENABLE REGISTER
00D6H
Using the PUR1 register, you can configure pull-up resistors to individual R17-R10 pins.
7
6
5
4
3
2
1
0
PUR17 PUR16 PUR15 PUR14 PUR13 PUR12 PUR11 PUR10
R/W R/W R/W R/W R/W R/W R/W R/W
PUR1
Reset value: 00H
0: Disable pull-up resistor
1: Enable pull-up resistor
0: Disable pull-up resistor
1: Enable pull-up resistor
0: Disable pull-up resistor
1: Enable pull-up resistor
0: Disable pull-up resistor
1: Enable pull-up resistor
0: Disable pull-up resistor
1: Enable pull-up resistor
0: Disable pull-up resistor
1: Enable pull-up resistor
0: Disable pull-up resistor
1: Enable pull-up resistor
0: Disable pull-up resistor
1: Enable pull-up resistor
PUR17
PUR16
PUR15
PUR14
PUR13
PUR12
PUR11
PUR10
R17 Pull-up Resistor Enable Bit
R16 Pull-up Resistor Enable Bit
R15 Pull-up Resistor Enable Bit
R14 Pull-up Resistor Enable Bit
R13 Pull-up Resistor Enable Bit
R12 Pull-up Resistor Enable Bit
R11 Pull-up Resistor Enable Bit
R10 Pull-up Resistor Enable Bit
R1
R1 PORT DATA REGISTER
00C1H
7
6
5
4
3
2
1
0
R17
R16
R15
R14
R13
R12
R11
R10
R1
Reset value: F8H
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
In input mode, it represents the R1 port status.
In output mode, R1 port represents it.
1: High
0 : Low
October 19, 2009 Ver.1.35
81
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