Port 3 Open-Drain Control Register (P3Odr); Pin Functions; Table 9.10 P37 Pin Function - Hitachi H8S/2628 Hardware Manual

Bit Bit Name Initial Value
7 P37 Undefined*
6 P36 Undefined*
5 P35 Undefined*
4 P34 Undefined*
3 P33 Undefined*
2 P32 Undefined*
1 P31 Undefined*
0 P30 Undefined*
Note:* Determined by the states of pins P37 to P30.
9.2.4

Port 3 Open-Drain Control Register (P3ODR)

P3ODR is an 8-bit readable/writable register that specifies the output type of port 3.
Bit Bit Name Initial Value
7 P37ODR 0
6 P36ODR 0
5 P35ODR 0
4 P34ODR 0
3 P33ODR 0
2 P32ODR 0
1 P31ODR 0
0 P30ODR 0
Note:* Determined by the states of pins P47 to P40.
9.2.5

Pin Functions

Port 3 pins also function as SCI_0 I/O pins and interrupt input pins. The correspondence between
the register specification and the pin functions is shown below.

Table 9.10 P37 Pin Function

P37DDR
Pin function
R/W Description
R If a port 3 read is performed while P3DDR bits are
set to 1, the P3DR values are read. If a port 3 read is
R
performed while P3DDR bits are cleared to 0, the pin
R
states are read.
R
R
R
R
R
R/W Description
R/W When a pin is specified as an output port, setting the
corresponding bit to 1 specifies pin output to open-
R/W
drain and the input pull-up MOS to the off state.
R/W
Clearing this bit to 0 specifies that to push-pull
output.
R/W
R/W
R/W
R/W
R/W
0
P37 input
1
P37 output
Rev. 1.0, 09/02, page 131 of 568