ISD4004 Datasheet, PDF(10/28 Page) Winbond – Single-Chip Voice Record/Playback Devices 8-, 10-, 12-, and 16-Minute Durations

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ISD4004 Datasheet, PDF (10/28 Pages) Winbond – Single-Chip Voice Record/Playback Devices 8-, 10-, 12-, and 16-Minute Durations

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ISD4004 Series

Instruction

Opcode <8 bits>

Address <16 bits>

Table 2:Opcode Summary

Operational Summary

POWERUP

SETPLAY

PLAY

SETREC

REC

SETMC

1

MC

00100XXX

11100XXX <A15âA0>

11110XXX

10100XXX <A15âA0>

10110XXX

11101XXX <A15âA0>

11111XXX

STOP

0X110XXX

STOPPWRDN 0X01XXXX

2

RINT

0X110XXX

Power-Up: Device will be ready for an operation after TPUD.

Initiates Playback from address <A15âA0>.

Playback from the current address (until EOM or OVF).

Initiates a Record operation from address <A15âA0>.

Records from current address until OVF is reached.

Initiates Message Cueing (MC) from address <A15âA0>.

Performs a Message Cue. Proceeds to the end of the current

message (EOM) or enters OVF condition if no more messages are

present.

Stops current operation.

Stops current Operation and enters stand-by (power-down) mode.

Read Interrupt status bits: Overflow and EOM.

1. Message Cueing can be selected only at the

beginning of a play operation.

POWER-UP SEQUENCE

The ISD4004 will be ready for an operation after

TPUD (25 ms approximately for 8 KHz sample rate).

The user needs to wait TPUD before issuing an opera-

tional command. For example, to play from ad-

dress 00 the following programing cycle should be

used.

Playback Mode

1. Send POWERUP command.

2. Wait TPUD (power-up delay).

3. Send SETPLAY command with address 00.

4. Send PLAY command.

2. As the Interrupt data is shifted out of the ISD4004,

control and address data is being shifted in. Care

should be taken such that the data shifted in is

compatible with current system operation. It is

possible to read interrupt data and start a new

operation at the same time. See Figure 5 through

Figure 8 for Opcode format.

Record Mode

1. Send POWERUP command.

2. Wait TPUD (power-up delay).

3. Send POWERUP command.

4. Send SETREC command with address 00.

5. Send REC command.

The device will start recording at address 00 and it

will generate an interrupt when an overflow is

reached (end of memory array). It will then stop re-

cording.

The device will start playback at address 00 and it

will generate an interrupt when an EOM is

reached. It will then stop playback.

6

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