Table of Contents
Advertisement
7.3.2
Port 3 Data Register (P3DR)
P3DR stores output data of port 3.
Bit
Bit Name
7
P37DR
6
P36DR
5
P35DR
4
P34DR
3
P33DR
2
P32DR
1
P31DR
0
P30DR
7.3.3
Port 3 Pull-Up MOS Control Register (P3PCR)
P3PCR controls the port 3 on-chip input pull-up MOSs on a bit-by-bit basis.
Bit
Bit Name
7
P37PCR
6
P36PCR
5
P35PCR
4
P34PCR
3
P33PCR
2
P32PCR
1
P31PCR
0
P30PCR
Initial
Value
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
Initial
Value
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
Description
If a port 3 read is performed while P3DDR bits are set
to 1, the P3DR values are read directly, regardless of
the actual pin states. If a port 3 read is performed while
P3DDR bits are cleared to 0, the pin states are read.
Description
The input pull-up MOS is turned on when a P3PCR bit
is set to 1 in the input port state.
The input pull-up MOS function cannot be used when
the host interface is enabled.
Rev. 1.00, 05/04, page 105 of 544
Advertisement
Table of Contents
