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H8/3002 Datasheet(PDF) 265 Page - Renesas Technology Corp |
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H8/3002 Datasheet(HTML) 265 Page - Renesas Technology Corp |
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265 / 700 page  9.5 Port 8 9.5.1 Overview Port 8 is a 5-bit input/output port that is also used for CS3 to CS0 output, RFSH output, and IRQ3 to IRQ0 input. Port 8 has the same set of pin functions in all operating modes. Figure 9-6 shows the pin configuration of port 8. Pins in port 8 can drive one TTL load and a 90-pF capacitive load. They can also drive a darlington transistor pair. Pins P82 to P80 have Schmitt-trigger inputs. Figure 9-6 Port 8 Pin Configuration 9.5.2 Register Descriptions Table 9-7 summarizes the registers of port 8. Table 9-7 Port 8 Registers Address* Name Abbreviation R/W Initial Value H'FFCD Port 8 data direction register P8DDR W H'F0 H'FFCF Port 8 data register P8DR R/W H'E0 Note: * Lower 16 bits of the address. Port 8 P8 (input)/CS (output) P8 (input)/CS (output)/IRQ (input) P8 (input)/CS (output)/IRQ (input) P8 (input)/CS (output)/IRQ (input) P8 (input/output)/ 4 3 2 1 0 0 1 2 3 Port 8 pins RFSH (output)/IRQ (input) 0 3 2 1 251 |
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