HD6433636SW datasheet(22/418 Pages) RENESAS

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1.3.2

Pin Functions

Table 1.2 outlines the pin functions.

Table 1.2

Pin Functions

Pin No.

Type

Symbol

TFP-80F

TFP-80C

FP-80B

I/O

Name and Functions

Power

source pins

7, 26

9, 28

Input

Power supply: All V

CC pins should be

connected to the system power supply

(+5 V)

3, 25

5, 27

Input

Ground: All V

SS pins should be

connected to the system power supply

(0 V)

Input

Analog power supply: This is the power

supply pin for the A/D converter. When

the A/D converter is not used, connect

this pin to the system power supply

(+5 V).

Input

Analog ground: This is the A/D

converter ground pin. It should be

connected to the system power supply

(0 V).

ref

Input

DTMF generator reference level: This

is a power supply pin for the reference

level for DTMF.

Clock pins

OSC

Input

System clock: These pins connect to a

crystal or ceramic oscillator, or can be

OSC

Output

used to input an external clock. See

section 4, Clock Pulse Generators, for a

typical connection diagram.

Input

Subclock: These pins connect to a

32.768-kHz crystal oscillator. See section

Output

4, Clock Pulse Generators, for a typical

connection diagram.

System

control

RES

Input

Reset: When this pin is driven low, the

chip is reset

TEST

Input

Test: This is a test pin, not for use in

applica-tion systems. It should be

connected to V

SS.

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