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SH7041A 데이터시트(PDF) 693 Page - Renesas Technology Corp

부품명 SH7041A
상세설명  Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
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제조업체  RENESAS [Renesas Technology Corp]
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19.4.2
Port C Data Register (PCDR)
PCDR is a 16-bit read/write register that stores data for port C. The bits PC15DR–PC0DR
correspond to the PC15/A15–PC0/A0 pins. When the pins are used as ordinary outputs, they will
output whatever value is written in the PCDR; when PCDR is read, the register value will be read
regardless of the pin status. When the pins are used as ordinary inputs, the pin status rather than
the register value is read directly when PCDR is read. When a value is written to PCDR, that value
can be written into PCDR, but it will not affect the pin status. Table 19.10 shows the read/write
operations of the port C data register.
PCDR is initialized by an external power-on reset. However, PCDR is not initialized for a manual
reset, reset by WDT, standby mode, or sleep mode.
Bit:
15
14
13
12
11
10
9
8
PC15DR PC14DR PC13DR PC12DR PC11DR PC10DR PC9DR
PC8DR
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
Bit:
7
6
5
4
3
2
1
0
PC7DR
PC6DR
PC5DR
PC4DR
PC3DR
PC2DR
PC1DR
PC0DR
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
Table 19.10 Read/Write Operation of the Port C Data Register (PCDR)
PCIOR
Pin Status
Read
Write
0
Ordinary input
Pin status
Can write to PCDR, but it has no effect on pin status
Other function
Pin status
Can write to PCDR, but it has no effect on pin status
1
Ordinary output
PCDR value
Value written is output by pin
Other function
PCDR value
Can write to PCDR, but it has no effect on pin status



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