SH7206 Datasheet, PDF (982/1188 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 20 I/O Ports
20.4.2 Port C Data Register L (PCDRL)
PCDRL is a 16-bit readable/writable register that stores port C data. Bits PC1DR and PC0DR
correspond to pins PC1/A1 and PC0/A0, respectively.
When a pin function is general output, if a value is written to PCDRL, that value is output directly
from the pin, and if PCDRL is read, the register value is returned directly regardless of the pin
state.
When a pin function is general input, if PCDRL is read, the pin state, not the register value, is
returned directly. If a value is written to PCDRL, although that value is written into PCDRL, it
does not affect the pin state. Table 20.6 summarizes PCDRL read/write operations.
PCDRL is initialized to the value shown in table 20.5 by a power-on reset. PCDRL is not
initialized by a manual reset or in sleep mode or software standby mode.
Bit: 15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PC1 PC0
DR DR
Initial value: -
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
R/W: R
R
R
R
R
R
R
R
R
R
R
R
R
R R/W R/W
Bit
15 to 2
Initial
Bit Name Value


1
PC1DR 0
0
PC0DR 0
R/W
R
R/W
R/W
Description
Reserved
These bits are always read as undefined values. The
write value should always be 0.
See table 20.6
Rev. 3.00 Jun. 18, 2008 Page 958 of 1160
REJ09B0191-0300