H8SLASH3003 datasheet(294/715 Pages) RENESAS

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9.10 Port C

9.10.1 Overview

Port C is an 8-bit input/output port that is also used for DMAC input and output (DREQ3, DREQ2,

TEND3, TEND2), CS7 to CS4 output, and IRQ7 and IRQ6 input. Port C has the same set of pin

functions in all operating modes. Figure 9-13 shows the pin configuration of port C.

Pins in port C can drive one TTL load and a 90-pF capacitive load. They can also drive a

darlington transistor pair.

Figure 9-13 Port C Pin Configuration

9.10.2 Register Descriptions

Table 9-17 summarizes the registers of port C.

Table 9-17 Port C Registers

Address*

Name

Abbreviation

R/W

Initial Value

H'FFD5

Port C data direction register

PCDDR

H'00

H'FFD7

Port C data register

PCDR

R/W

H'00

Note: * Lower 16 bits of the address.

Port C

PC (input/output)/IRQ (input)

PC (input)/DREQ (input)/CS (output)

PC (input)/TEND (output)/CS (output)

PC (input)/DREQ (input)/CS (output)

PC (input)/TEND (output)/CS (output)

Port C pins

PC (input/output)

276

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