HT8659 datasheet(3/15 Pages) HOLTEK

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Pad Description

Pad No.

Pad Name

I/O

Internal

Connection

Description

1AS9

I/O

Pull-High

CMOS

Input:

For IC test only

Output: Address output for DRAM of 1Mb and

column address strobe for DRAM of 256Kb

2AS8

I/O

Pull-High

CMOS

Input:

For IC test only

Output: Address output to DRAM

3AS7

I/O

Pull-High

CMOS

Input:

For IC test only

Output: Address output to DRAM

4AS6

I/O

Pull-High

CMOS

Input:

For IC test only

1: For IC test only

0: Not applicable

Output: Address output to DRAM

5AS5

I/O

Pull-High

CMOS

Input:

DRAM type selection:

1: 256Kb (without external pull-low

resistors)

0: 1Mb (with an external pull-low resistor)

Output: Address output to DRAM

6AS4

I/O

Pull-High

CMOS

Input:

Manual/Auto playback selection:

1: Manual (without external pull-low

resistors)

0: Auto (with an external pull-low resistor)

Output: Address output to DRAM

7,8

AS3,AS2

I/O

Pull-High

CMOS

Input:

DRAM chip number selection (refer to the

functional description)

Output: Address output to DRAM

9,10

AS1,AS0

I/O

Pull-High

CMOS

Input:

Sampling rate selection (refer to the

functional description)

Output: Address output to DRAM

VDD

—

Positive power supply

AIN

—

Pre-amplifier input pin

—

Pre-amplifier output pin

Amplifier gain should be adjusted between AIN and

AO by a resistor.

BIAS

—

For internal OP bias de-coupling

VOUT

—

Audio signal output (non-filtered, output directly)

FOUT

—

Audio signal output through an internal low-pass

filter

VSS

—

Negative power supply (GND)

HT8658/HT8659

26th Sep ’96

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