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HD6432138SW Datasheet(PDF) 272 Page - Renesas Technology Corp |
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HD6432138SW Datasheet(HTML) 272 Page - Renesas Technology Corp |
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272 / 1061 page  Section 8 I/O Ports Rev. 4.00 Jun 06, 2006 page 218 of 1004 REJ09B0301-0400 8.6 Port 5 8.6.1 Overview Port 5 is a 3-bit I/O port. Port 5 pins also function as SCI0 I/O pins (TxD0, RxD0, SCK0), and the IIC0 I/O pin (SCL0) (option in H8S/2138 Group only). In the H8S/2138 Group, P52 and SCK0 are NMOS push-pull outputs, and SCL0 is an NMOS open-drain output. Port 5 pin functions are the same in all operating modes. Figure 8.13 shows the port 5 pin configuration. P52 (I/O)/SCK0 (I/O)/SCL0 (I/O) P51 (I/O)/RxD0 (Input) P50 (I/O)/TxD0 (Output) Port 5 Port 5 pins Figure 8.13 Port 5 Pin Functions 8.6.2 Register Configuration Table 8.11 shows the port 5 register configuration. Table 8.11 Port 5 Registers Name Abbreviation R/W Initial Value Address* Port 5 data direction register P5DDR W H'F8 H'FFB8 Port 5 data register P5DR R/W H'F8 H'FFBA Note: * Lower 16 bits of the address. |
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