HD6413002 Datasheet, PDF(267/700 Page) Renesas Technology Corp – High-performance single-chip microcontroller

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HD6413002 Datasheet, PDF (267/700 Pages) Renesas Technology Corp – High-performance single-chip microcontroller

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9.5.3 Pin Functions

The port 8 pins are also used for CS3 to CS0 and RFSH output and IRQ3 to IRQ0 input.

Table 9-8 describes the selection of pin functions.

Table 9-8 Port 8 Pin Functions

Pin

P84/CS0

P83/CS1/IRQ3

P82/CS2/IRQ2

P81/CS3/IRQ1

P80/RFSH/IRQ0

Pin Functions and Selection Method

Bit P84DDR selects the pin function as follows

P84DDR

Pin function

0

P84 input

1

CS0 output

Bit P83DDR selects the pin function as follows

P83DDR

Pin function

0

P83 input

IRQ3 input

1

CS1 output

Bit P82DDR selects the pin function as follows

P82DDR

Pin function

0

P82 input

IRQ2 input

1

CS2 output

Bit P81DDR selects the pin function as follows

P81DDR

Pin function

0

P81 input

IRQ1 input

1

CS3 output

Bit RFSHE in RFSHCR and bit P80DDR select the pin function as follows

RFSHE

P80DDR

Pin function

0

0

1

P80 input

P80 output

IRQ0 input

1

â

RFSH output

253

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