7480 datasheet(28/337 Pages) RENESAS

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7480 Group and 7481 Group User's Manual

1-11

HARDWARE

Table 1.5.2 Pin Descriptions (2)

1.5 Pin Descriptions

Name

I/O port P0

I/O port P1

Input port P2

Input port P3

I/O port P4

I/O port P5

Function

• 8-bit I/O port pins

• The output structure is CMOS output.

• When an input port is selected, a pull-up transistor can

be connectable by the bit.

• In input mode, a key-on wake up function is provided.

• 8-bit I/O port pins

• The output structure is CMOS output.

• When an input port is selected, a pull-up transistor can

be connected by the 4 bits.

• P12 and P13 serve the alternative functions of the timer

output pins T0 and T1.

• P14, P15, P16, and P17 serve the alternative functions of

the serial I/O pins RxD, TxD, SCLK and SRDY, respectively.

• 8-bit input port pins

• P20–P27 serve the alternative functions of the analog

input pins IN0–IN7.

Note: The 7480 Group has only four pins of P20–P23 (IN0–IN3).

• 4-bit input port pins

• P30 and P31 serve the alternative functions of the external

interrupt input pins INT0 and INT1.

• 4-bit I/O port pins

• The output structure is N-channel open-drain outputs with

built-in clamping diodes.

• P40 and P41 serve the alternative functions of the timer

I/O pins CNTR0 and CNTR1.

Note: The 7480 Group has only two pins of P40 and P41.

• 4-bit I/O port pins

• The output structure is N-channel open-drain outputs with

built-in clamping diodes.

Note: The 7480 Group is not provided with port P5.

Input/

Output

I/O

Input

I/O

P00–P07

P10–P17

P20–P27

P30–P33

P40–P43

P50–P53

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