h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 234

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 I/O Ports
8.4.2
P3DR stores output data of port 3.
8.4.3
P3PCR controls the port 3 on-chip input pull-up MOSs on a bit-by-bit basis.
Rev. 3.00 Mar 21, 2006 page 180 of 788
REJ09B0300-0300
Bit
7
6
5
4
3
2
1
0
Bit
7
6
5
4
3
2
1
0
Bit Name
P37DR
P36DR
P35DR
P34DR
P33DR
P32DR
P31DR
P30DR
Bit Name
P37PCR
P36PCR
P35PCR
P34PCR
P33PCR
P32PCR
P31PCR
P30PCR
Port 3 Data Register (P3DR)
Port 3 Pull-Up MOS Control Register (P3PCR)
0
0
0
0
0
0
0
0
Initial Value
0
0
0
0
0
0
0
0
Initial Value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
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
In modes 2 and 3 (when EXPE = 0), 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.