H8SLASH3003 datasheet(296/715 Pages) RENESAS

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9.10.3 Pin Functions

The port C pins are also used for DMA controller input and output (DREQ3, TEND3, DREQ2,

TEND2), CS7 to CS4 output, and IRQ7 and IRQ6 input. Table 9-18 describes the selection of

functions of pins PC7 to PC2.

Table 9-18 Port C Pin Functions

Pin Functions and Selection Method

PC7/IRQ7

Bit PC7DDR selects the pin function as follows

PC7DDR

Pin function

PC7 input

PC7 output

IRQ7 input

PC6/IRQ6

Bit PC6DDR selects the pin function as follows

PC6DDR

Pin function

PC6 input

PC6 output

IRQ6 input

PC5/DREQ3/CS7

DMAC channel 3 settings (bits DTS2/1/0A and DTS2/1/0B in DTCR3A and

DTCR3B) and bit PC5DDR in PCDDR select the pin function as follows

PC5DDR

Pin function

PC5 input

CS7 output

DREQ3 input*

Note: * DREQ3 input under DMAC channel 3 settings 1 in the table below.

DMAC channel

3 settings

121

DTS2A, DTS1A

Not both 1

Both 1

DTS0A

—

00111

DTS2B

01101011

DTS1B

—

278

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