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HD64F36049 Datasheet(PDF) 158 Page - Renesas Technology Corp |
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HD64F36049 Datasheet(HTML) 158 Page - Renesas Technology Corp |
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158 / 562 page  Section 9 I/O Ports Rev. 3.00 Mar. 15, 2006 Page 126 of 526 REJ09B0060-0300 9.4.4 Port Pull-Up Control Register 5 (PUCR5) PUCR5 controls the pull-up MOS in bit units of the pins set as the input ports. Bit Bit Name Initial Value R/W Description 7 6 0 0 Reserved These bits are always read as 0. 5 4 3 2 1 0 PUCR55 PUCR54 PUCR53 PUCR52 PUCR51 PUCR50 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W Only bits for which PCR5 is cleared are valid. The pull- up MOSs of the corresponding pins enter the on-state when these bits are set to 1, while they enter the off- state when these bits are cleared to 0. 9.4.5 Pin Functions The correspondence between the register specification and the port functions is shown below. • P57/SCL pin Register ICCR PCR5 Bit Name ICE PCR57 Pin Function Setting Value 0 0 P57 input pin 1 P57 output pin 1 X SCL I/O pin [Legend] X: Don't care. SCL performs the NMOS open-drain output, that enables a direct bus drive. |
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