Rev. 1.0, 02/00, page 200 of 1141
MOS Pull-Up Select Register 2 (PUR2)
0
0
1
0
R/W
2
0
R/W
3
0
4
0
R/W
0
R/W
5
0
7
0
R/W
R/W
R/W
R/W
6
PUR24
PUR23
PUR22
PUR21
PUR20
PUR27
PUR26
PUR25
Bit :
Initial value :
R/W :
MOS pull-up selector register 2 (PUR2) controls the ON and OFF of the MOS pull-up transistor
of port 2. Only the pin whose corresponding bit of PCR2 was set to 0 (input) becomes valid. If
the corresponding bit of PCR2 is set to 1 (output), the corresponding bit of PUR2 becomes invalid
and the MOS pull-up transistor is turned off.
PUR2 is an 8-bit read/write enable register. When reset, PUR2 is initialized to H'00.
Bits 7 to 0
P27 to P20 Pull-Up MOS Control (PUR27 to PUR20)
Bit n
PUR2n
Description
0
The P2n pin has no MOS pull-up transistor
(Initial value)
1
The P2n pin has a MOS pull-up transistor
(n = 7 to 0)