7220 datasheet(144/303 Pages) RENESAS

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M37220M3-XXXSP/FP

4.3 Pin description

7220 Group User’s Manual

4-6

4.3 Pin description

The pin description of M37220M3-XXXSP/FP is shown in Table 4.3.1.

Table 4.3.1 Pin description (1)

Power source

CNVSS

Reset input

Clock input

Clock output

I/O port P0

PWM output

External

interrupt input

Analog input

I/O port P1

Analog input

External

interrupt input

VCC,

VSS

CNVSS

RESET

XIN

XOUT

P00

PWM0–

P05/

PWM5,

P0 6/INT2/

A-D4,

P07/INT1

P11–P14,

P15/A-D1/

INT3,

P16/A-D2,

P17/A-D3

Input

Output

I/O

Output

Input

I/O

Input

Name

Input/

Output

Functions

Apply voltage of 5 V ± 10 % (typical) to VCC, and 0 V to VSS.

This is connected to VSS.

To enter the reset state, the reset input pin must be kept at a “L” for

µs or more (under normal VCC conditions).

If more time is needed for the quartz-crystal oscillator to stabilize, this

“L” condition should be maintained for the required time.

This chip has an internal clock generating circuit. To control generating

frequency, an external ceramic resonator or a quartz-crystal oscillator

is connected between pins XIN and XOUT. If an external clock is used,

the clock source should be connected to the XIN pin and the XOUT pin

should be left open.

Port P0 is an 8-bit I/O port with direction register allowing each I/O bit

to be individually programmed as input or output. At reset, this port is

set to input mode. The output structure is N-channel open-drain output.

The note out of this Table gives a full of port P0 function.

Pins P00–P05 are also used as PWM output pins PWM0–PWM5

respectively. The output structure is N-channel open-drain output.

Pins P06 , P07 are also used as external interrupt input pins INT2,

INT1 respectively.

P06 pin is also used as analog input pin A-D4.

Port P1 is an 8-bit I/O port and has basically the same functions as

port P0. The output structure is CMOS output.

Pins P15–P17 are also used as analog input pins A-D1 to A-D3

respectively.

P15 pin is also used as external interrupt input pin INT3.

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