HT8656B datasheet(4/11 Pages) HOLTEK

4 / 11 page

Pin Description

Pin No.

Pin Name

I/O

Internal

Connection

Description

1, 2

A6, A7

CMOS

DRAM address output

3~8

A5~A0

CMOS

DRAM address output

RASB

CMOS

DRAM row address strobe

WRB

CMOS

DRAM write enable

DATA

I/O

CMOS

DRAM data input/output

CMOS

DRAM address output

CASB

CMOS

DRAM column address strobe

OSC2

—

Oscillator output

OSC1

—

Oscillator input

LEDB

NMOS

Open Drain

LED indicator:

Idle: LED is turned on

Record: LED flashes

Play: LED is turned off

START

NMOS

Open Drain

System start pin

MOTOR

CMOS

Motor drive output (active high) when playing back

VSS

—

Negative power supply (GND)

BIAS

—

For internal AMP bias de-coupling

AIN1

—

Internal AMP first stage input (inverted)

AO1

—

Internal AMP first stage output

AIN2

—

Internal AMP second stage input (inverted)

IOUT

(8656A)

—

Voltage type audio output for an external power AMP

IOUT

(8656B)

—

Current type audio output for an external transistor

VDD

—

Positive power supply

TESTB

Pull-High

For IC test only

16KB

Pull-High

32Kbps/16Kbps sampling rate selection:

Open/high: 32Kbps

Low: 16Kbps

Pull-High

64K/256K DRAM size selection:

Open/high: 64K

Low: 256K

HT8656

5th May ’98

HT8656B Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

HT8656B Datasheet(HTML) 4 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11

Datasheet Download

Link URL