SH7014 Datasheet, PDF (517/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

17. I/O Ports (I/O)
17.5.2 Port D Data Register L (PDDRL)
Bit: 15
14
13
12
11
10
9
8
PD15DR PD14DR PD13DR PD12DR PD11DR PD10DR PD9DR PD8DR
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 7
6
5
4
3
2
1
0
PD7DR PD6DR PD5DR PD4DR PD3DR PD2DR PD1DR PD0DR
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
PDDRL is a 16-bit read/write register that stores data for port D. The bits PD15DR to PD0DR
correspond to the PD15/D15 to PD0/D0 pins. When the pins are used as ordinary outputs, they
will output whatever value is written in the PDDRL; when PDDRL is read, the register value will
be read regardless of the pin status. When the pins are used as ordinary inputs, the pin status rather
than the register value is read directly when PDDRL is read. When a value is written to PDDRL,
that value can be written into PDDRL, but it will not affect the pin status. Table 17.12 shows the
read/write operations of the port D data register.
PDDRL is initialized by an external power-on reset. However, PDDRL is not initialized for a reset
by WDT, standby mode, or sleep mode.
The settings in this register are functional only in the SH7016 and SH7017. In the SH7014, there
are no pins corresponding to this register, and it should not be read or written to.
Table 17.12 Read/Write Operation of the Port D Data Register (PDDR)
PDIOR
0
1
Pin Status
Read
Ordinary input Pin status
Other function Pin status
Ordinary output PDDR value
Other function PDDR value
Write
Can write to PDDR, but it has no effect on pin status
Can write to PDDR, but it has no effect on pin status
Value written is output by pin
Can write to PDDR, but it has no effect on pin status
Rev.5.00 Sep. 27, 2007 Page 483 of 716
REJ09B0398-0500