HD6417618 datasheet(489/646 Pages) RENESAS

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Section 17 I/O Ports

Rev. 6.00 Jun. 12, 2007 Page 457 of 610

REJ09B0131-0600

Section 17 I/O Ports

This LSI has 26 ports (ports A, B, C, D, and E). Port A, port B, port C, port D, and port E are 10-

bit, 14-bit, 21-bit, 8-bit, and 25-bit I/O port, respectively. The pins of each port are multiplexed

with other functions. The pin function controller (PFC) handles the selection of multiplex pin

functions. Each port has a data register to store data of pin.

17.1

Port A

Port A of this LSI is an I/O port with ten pins as shown in figure 17.1.

PA16 (input/output)/A16 (output)

PA17 (input/output)/A17 (output)

PA18 (input/output)/A18 (output)

PA19 (input/output)/A19 (output)

PA20 (input/output)/A20 (output)

PA21 (input/output)/A21 (output)

PA22 (input/output)/A22 (output)

PA23 (input/output)/A23 (output)

PA24 (input/output)/A24 (output)

PA25 (input/output)/A25 (output)

Port A

Figure 17.1 Port A

17.1.1

Port A is a 10-bit I/O port that has a following register. For details on the address of this register

and the states of this register in each processing state, see section 20, List of Registers.

• Port A data register H (PADRH)

17.1.2

Port A Data Register H (PADRH)

PADRH is a 16-bit readable/writable register which stores data for port A. Bits PA25DR to

PA16DR correspond to pins PA25 to PA16. (Description of multiplexed functions is omitted.)

HD6417618 Datasheet(PDF) 489 Page - Renesas Technology Corp