HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 543

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

17.4.2
The port C data register (PCDR) is a 16-bit readable/writable register that stores port C data. Bits
PC14DR to PC0DR correspond to pins PC14/TOH10 to PC0/WRL.
When a pin functions as a general output, if a value is written to PCDR, that value is output
directly from the pin, and if PCDR is read, the register value is returned directly regardless of the
pin state.
When a pin functions as a general input, if PCDR is read the pin state, not the register value, is
returned directly. If a value is written to PCDR, although that value is written into PCDR it does
not affect the pin state. Table 17.6 summarizes port C data register read/write operations.
PCDR is initialized by a power-on reset (excluding a WDT power-on reset), and in hardware
standby mode. It is not initialized in software standby mode or sleep mode.
Table 17.6 Port C Data Register (PCDR) Read/Write Operations
PCIOR
0
1
Initial value:
R/W:
Bit:
Port C Data Register (PCDR)
Pin Function
General input
Other than general
input
General output
Other than general
output
15
—
R
1
PC14
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
DR
14
0
PC13
DR
13
0
PC12
DR
12
0
PC11
Read
Pin state
Pin state
PCDR value
PCDR value
DR
11
0
PC10
DR
10
0
PC9
DR
9
0
Write
Value is written to PCDR, but does not affect
pin state
Value is written to PCDR, but does not affect
pin state
Write value is output from pin
Value is written to PCDR, but does not affect
pin state
PC8
DR
8
0
PC7
DR
Rev. 5.00 Jan 06, 2006 page 523 of 818
7
0
PC6
DR
6
0
PC5
DR
5
0
Section 17 I/O Ports (I/O)
PC4
DR
4
0
PC3
DR
3
0
REJ09B0273-0500
PC2
DR
2
0
PC1
DR
1
0
PC0
DR
0
0