SH7065 Datasheet, PDF (723/941 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

Section 18 I/O Ports (I/O)
18.2.2 Port A Data Register H (PADRH)
Bit: 15
14
13
12
11
10
9
8
—
—
—
—
—
— PA25DR PA24DR
Initial value:
0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R
R/W
R/W
Bit:
7
6
5
4
3
2
1
0
PA23DR PA22DR PA21DR PA20DR PA19DR PA18DR PA17DR PA16DR
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
Port A data register H (PADRH) is a 16-bit readable/writable register that stores port A data. Bits
PA25DR to PA16DR correspond to pins PA25/CS5 to PA16/WRHH/HHBS/TCLKC/TIOC3A.
When a pin functions as a general output, if a value is written to PADRH, that value is output
directly from the pin, and if PADRH is read, the register value is returned directly regardless of
the pin state.
When a pin functions as a general input, if PADRH is read the pin state, not the register value, is
returned directly. If a value is written to PADRH, although that value is written into PADRH it
does not affect the pin state. Table 18.2 summarizes port A data register read/write operations.
PADRH is initialized by an external power-on reset, but is not initialized by a WDT reset or in
standby mode or sleep mode.
Rev. 5.00 Sep 11, 2006 page 701 of 916
REJ09B0332-0500