H8SLASH3021 datasheet(35/712 Pages) RENESAS

35 / 712 page

1. Overview

Rev.2.00 Mar. 22, 2007 Page 11 of 684

REJ09B0352-0200

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

21,

Input

Power: For connection to the power supply.

Connect all V

CC pins to the system power

supply.

12,

30,

Input

Ground: For connection to ground (0 V).

Connect all V

SS 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 16, 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 16, Clock Pulse

Generator.

Output

System clock: Supplies the system clock to

external devices

Operating

mode control

45,

Input

Mode 2 to mode 0: For setting the

operating mode, as follows. These pins

should not be changed during operation.

Operating

Mode

—

Mode 1

—

Mode 3

—

Mode 5

Mode 6

Mode 7

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