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SH7261 Datasheet(PDF) 1087 Page - Renesas Technology Corp

Part # SH7261
Description  32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series
PDF  1348 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7261 Datasheet(HTML) 1087 Page - Renesas Technology Corp

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Section 24 I/O Ports
Rev. 2.00 Sep. 07, 2007 Page 1055 of 1312
REJ09B0320-0200
24.4.2
Port D Data Register (PDDR)
PDDR is a 16-bit readable/writable register that stores port D data. Bits PD14DR to PD0DR
correspond to pins PD14 to PD0, respectively.
If a pin is set to the general output function, that pin will output the value written to the
corresponding bit in PDDR, and the register value is read from PDDR regardless of the state of the
pin.
If a pin is set to the general input function, the pin state, not the register value, will be returned if
PDDR is read. Also, if a value is written to PDDR, although the value will actually be written, it
will have no influence on the state of the pin. Table 24.8 summarizes the PDDR read/write
operations.
Bit 15 in PDDR is reserved. This bit is read as 0. The write value should always be 0.
PDDR is initialized to H'0000 by a power-on reset or in deep standby mode. This register is not
initialized either by a manual reset or by switching to sleep mode or software standby mode.
15
14
13
12
11
10
987654321
0
Bit:
Initial value:
R/W:
0000000000000000
R
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
—
PD14
DR
PD13
DR
PD12
DR
PD11
DR
PD10
DR
PD9
DR
PD8
DR
PD7
DR
PD6
DR
PD5
DR
PD4
DR
PD3
DR
PD2
DR
PD1
DR
PD0
DR
Table 24.8
Port D Data Register (PDDR) Read/Write Operations
PDIOR
Pin Function
Read
Write
0
General input
Pin state
The value is written to PDDR but there is no
effect on the pin state.
Other than general
input
Pin state
The value is written to PDDR but there is no
effect on the pin state.
1
General output
Value of
PDDR
The value written is output from the pin.
Other than general
output
Value of
PDDR
The value is written to PDDR but there is no
effect on the pin state.



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