H8SLASH3004 datasheet(23/497 Pages) RENESAS

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1.4 Pin Functions

Table 1-3 summarizes the pin functions.

Table 1-3 Pin Functions

Type

Symbol

Pin No.

I/O

Name and Function

Power

VCC

21, 53

Input

Power: For connection to the power supply

(+5 V). Connect all VCC pins to the +5-V system

power supply.

VSS

12, 30, 50

Input

Ground: For connection to ground (0 V).

Connect all VSS pins to the 0-V system power

supply.

Clock

XTAL

Input

For connection to a crystal resonator.

For examples of crystal resonator and external

clock input, see section 13, Clock Pulse

Generator.

EXTAL

Input

For connection to a crystal resonator or input of

an external clock signal. For examples of

crystal resonator and external clock input, see

section 13, Clock Pulse Generator.

Output System clock: Supplies the system clock to

external devices

Operating

MD1,

44,

Input

Mode 1 and mode 0: For setting the operating

mode control

MD0

mode, as follows

MD1

MD0

Operating Mode

00—

Mode 1

10—

Mode 3

System control

RES

Input

Reset input: When driven low, this pin resets

the H8/3004 or H8/3005

RESO

Output Reset output: Outputs a reset signal to

external devices

STBY

Input

Standby: When driven low, this pin forces

a transition to hardware standby mode

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