H83048 datasheet(39/905 Pages) RENESAS

39 / 905 page

Section 1 Overview

Rev. 7.00 Sep 21, 2005 page 15 of 878

REJ09B0259-0700

1.3.3

Pin Functions

Table 1.4 summarizes the pin functions.

Table 1.4

Pin Functions

Type

Symbol

Pin No.

I/O

Name and Function

Power

VCC

1, 35, 68

Input

Power: For connection to the power

supply. Connect all VCC pins to the system

power supply.

VSS

11, 22, 44,

57, 65, 92

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 20, 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 20, Clock Pulse

Generator.

Output

System clock: Supplies the system clock

to external devices.

Operating mode

control

MD2 to MD0 75 to 73

Input

Mode 2 to mode 0: For setting the

operating mode, as follows. Inputs at these

pins must not be changed during operation.

MD2

MD1

MD0

Operating Mode

000

—

Mode 1

Mode 2

Mode 3

Mode 4

Mode 5

Mode 6

Mode 7

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