SH7721 datasheet(87/1524 Pages) RENESAS

87 / 1524 page

Section 1

Overview

Rev. 3.00

Jan. 18, 2008

Page 25 of 1458

REJ09B0033-0300

1.3.2

Pin Functions

Table 1.5 lists the pin functions.

Table 1.5

SH7720/SH7721 Pin Functions

Classification

Symbol

I/O

Name

Function

Vcc



Power supply

Power supply for the internal

modules and ports for the system.

Connect all Vcc pins to the system

power supply. There will be no

operation if any pins are open.

Vss



Ground

Ground pin. Connect all Vss pins

to the system power supply (0 V).

There will be no operation if any

pins are open.

VccQ



Power supply

Power supply for I/O pins. Connect

all VccQ pins to the system power

supply. There will be no operation

if any pins are open.

VssQ



Ground

Ground pin. Connect all VssQ pins

to the system power supply (0 V).

There will be no operation if any

pins are open.

VccQ1



Power supply

Input/output power supply

(1.8/3.3 V) pin.

Power supply

VssQ1



Ground

Input/output power supply (0 V)

pin.

Vcc_PLL1



PLL1 power

supply

Power supply for the on-chip PLL1

oscillator. (1.5 V)

Vss_PLL1



PLL1 ground

Ground pin for the on-chip PLL1

oscillator.

Vcc_PLL2



PLL2 power

supply

Power supply for the on-chip PLL2

oscillator. (1.5 V)

Vss_PLL2



PLL2 ground

Ground pin for the on-chip PLL2

oscillator.

Clock

EXTAL

External clock

For connection to a crystal

resonator. An external clock signal

may also be input.

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