SH7764 Datasheet, PDF (1427/1752 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC Engine Family SH-4A Series

Section 27 General Purpose I/O (GPIO)
27.2.14 Port D Data Register (PTDAT_D)
PTDAT_D is a 16-bit readable/writable register that stores port D data.
Bit: 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0








PTDAT_ PTDAT_ PTDAT_ PTDAT_ PTDAT_ PTDAT_ PTDAT_ PTDAT_
D7
D6
D5
D4
D3
D2
D1
D0
Initial value: 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R
R
R R/W R/W R/W R/W R/W R/W R/W R/W
Bit
15 to 8
Bit Name

7
PTDAT_D7
6
PTDAT_D6
5
PTDAT_D5
4
PTDAT_D4
3
PTDAT_D3
2
PTDAT_D2
1
PTDAT_D1
0
PTDAT_D0
Initial Value R/W
All 0
R
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
Reserved
The lower 8-bit value is always read from
these bits. The write value should always be
0.
Each bit stores output data of a pin used as a
general output port.
When the pin is used as a general output
port, if the port is read, the value of the
corresponding bit in this register will be read.
When the pin is used as a general input port,
if this register is read, the status of the
corresponding pin will be read.
When the pin is set to a function other than
the general port, if it is used as an input pin,
the pin status will be read from the
corresponding bit in this register and writing
to the bit is ignored; for an output pin, an
undefined value will be read from the bit and
writing to the bit is ignored.
Rev. 1.00 Nov. 22, 2007 Page 1371 of 1692
REJ09B0360-0100