SH7670 Datasheet, PDF (1066/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 24 I/O Ports
24.1.2 Port A Data Register H (PADRH)
PADRH is a 16-bit readable/writable register that stores port A data. Bits PA25DR to PA17DR
correspond to pins PA25 to PA17, respectively (description of the other functions are omitted).
If a pin is set to the general output function, the pin will output the value written to the
corresponding bit in PADRH, and the register value is read from PADRH 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
PADRH is read. Also, if a value is written to PADRH, although the value will actually be written,
it will have no influence on the state of the pin.Table 24.1 summarizes the PADRH read/write
operations.
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
PB7 PB6
DR DR
PB5 PB4
DR DR
PB3 PB2
DR DR
PB1 PB0
DR DR
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 Bit Name Initial Value R/W
15 to —
10
All 0
R
9 PA25DR 0
R/W
8 PA24DR 0
R/W
7 PA23DR 0
R/W
6 PA22DR 0
R/W
5 PA21DR 0
R/W
4 PA20DR 0
R/W
3 PA19DR 0
R/W
2 PA18DR 0
R/W
1 PA17DR 0
R/W
0—
0
R
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
See table 24.1.
Reserved
These bits are always read as 0. The write value should
always be 0.
Rev. 1.00 Nov. 14, 2007 Page 1040 of 1262
REJ09B0437-0100