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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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H838532H датащи(PDF) 198 Page - Renesas Technology Corp |
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H838532H датащи(HTML) 198 Page - Renesas Technology Corp |
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198 / 508 page  Section 8 I/O Ports Rev. 1.00 May 30, 2008 Page 178 of 484 REJ09B0436-0100 8.4 Port 4 8.4.1 Overview Port 4 is a 3-bit I/O port and 1-bit input port, configured as shown in figure 8.3. P4 P4 P4 P4 / IRQ0 /TXD32 /RXD32 /SCK32 3 2 1 0 Port 4 Figure 8.3 Port 4 Pin Configuration 8.4.2 Register Configuration and Description Table 8.8 shows the port 4 register configuration. Table 8.8 Port 4 Registers Name Abbr. R/W Initial Value Address Port data register 4 PDR4 R/W H'F8 H'FFD7 Port control register 4 PCR4 W H'F8 H'FFE7 (1) Port Data Register 4 (PDR4) Bit Initial value Read/Write 7 — 1 — 6 — 1 — 5 — 1 — 4 — 1 — 3 P4 1 R 0 P4 0 R/W 2 P4 0 R/W 1 P4 0 R/W 32 1 0 PDR4 is an 8-bit register that stores data for port 4 pins P4 2 to P40. If port 4 is read while PCR4 bits are set to 1, the values stored in PDR4 are read, regardless of the actual pin states. If port 4 is read while PCR4 bits are cleared to 0, the pin states are read. Upon reset, PDR4 is initialized to H'F8. |
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