SH7041A datasheet(75/923 Pages) RENESAS

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1.3.3

Pin Functions

Table 1.7 lists the pin functions.

Table 1.7

Pin Functions

Classification

Symbol

I/O

Name

Function

Power supply

Supply

Connects to power supply.

Connect all V

CC pins to the system

supply. No operation will occur if

there are any open pins.

Ground

Connects to ground.

Connect all V

SS pins to the system

ground. No operation will occur if

there are any open pins.

Program

supply

Connects to the power supply (V

CC)

during normal operation.

When in PROM mode, apply 12.5 V.

Clock

PLLVCC

PLL supply

On-chip PLL oscillator supply.

PLLVSS

PLL ground

On-chip PLL oscillator ground.

PLLCAP

PLL

capacitance

On-chip PLL oscillator external

capacitance connection pin.

EXTAL

External clock

Connect a crystal oscillator. Also, an

external clock can be input to the

EXTAL pin.

XTAL

Crystal

Connect a crystal oscillator.

System clock

Supplies the system clock to

peripheral devices.

System control

RES

Power-on reset

Power-on reset when low

MRES

Manual reset

Manual reset when low

WDTOVF

Watchdog

timer overflow

Overflow output signal from WDT

BREQ

Bus request

Goes low when external device

requests bus right release

BACK

Bus request

acknowledge

Indicates that bus right has been

released to external device. The

device that output the

BREQ signal

receives the

BACK signal, notifying

the device that it has obtained the bus

right.

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