HT8665 datasheet(4/13 Pages) HOLTEK

4 / 13 page

Pin No.

Pin Name

I/O

Internal

Connection

Description

—

No connection

VOUT

—

Voltage type audio output for an external power AMP

MIXIN

—

Echo mixer input

—

No connection

—

No connection

—

No connection

MIXOUT

—

Echo mixer output

OSC1

—

Oscillator input

OSC2

—

Oscillator output

ADMOUT

—

ADM D/A output

BIAS

—

For OP bias de-coupling

AO1

—

Internal AMP first stage output

AIN2

—

Internal AMP second stage input (inverting)

—

No connection

AIN1

—

Internal AMP first stage input (inverting)

START

CMOS

System start pin

16KB

Pull-High

Sampling rate selection:

Open/high: 32K bps;

Low: 16K bps

TESTB

Pull-Low

For IC test only

Pull-High

Echo delay time selection:

1. DRAM of 64K: Open/high: 256ms;

Low: 128ms

2. DRAM of 256K: Open/high: 512ms;

Low: 256ms

Pull-High

DRAM size selection:

Open/high: 64K;

Low: 256K

VSS

—

Negative power supply (GND)

CMOS

DRAM address output

CMOS

DRAM address output

—

No connection

CMOS

DRAM address output

HT8665

21st Dec ’95

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