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SH7261 Datasheet(PDF) 1084 Page - Renesas Technology Corp |
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SH7261 Datasheet(HTML) 1084 Page - Renesas Technology Corp |
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1084 / 1348 page  Section 24 I/O Ports Rev. 2.00 Sep. 07, 2007 Page 1052 of 1312 REJ09B0320-0200 24.3.2 Port C Data Registers H and L (PCDRH and PCDRL) PCDRH and PCDRL are 16-bit readable/writable registers that store port C data. Bits PC21DR to PC0DR correspond to pins PC21 to PC0, respectively. If a pin is set to the general output function, the pin will output the value written to the corresponding bit in PCDRH or PCDRL, and the register value is read from PCDRH and PCDRL 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 PCDRH or PCDRL is read. Also, if a value is written to PCDRH or PCDRL, although the value will actually be written, it will have no influence on the state of the pin. Table 24.6 summarizes the PCDRH and PCDRL read/write operations. Bits 15 to 6 in PCDRH are reserved. These bits are read as 0. The write value should always be 0. PCDRH and PCDRL are initialized to H'0000 by a power-on reset or in deep standby mode. These registers are not initialized either by a manual reset or by switching to sleep mode or software standby mode. • Port C data register H (PCDRH) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit: Initial value: R/W: 0000000000000000 R R R R R R R/W R/W R/W R/W R/W R/W —————— PC21 DR PC20 DR PC19 DR PC18 DR PC17 DR PC16 DR RRRR ———— • Port C data register L (PCDRL) 15 14 13 12 11 10 987654321 0 Bit: Initial value: R/W: 0000000000000000 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 R/W PC15 DR PC14 DR PC13 DR PC12 DR PC11 DR PC10 DR PC9 DR PC8 DR PC7 DR PC6 DR PC5 DR PC4 DR PC3 DR PC2 DR PC1 DR PC0 DR |
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