ISDMICROTAD-16ME 查看數據表（PDF） - Information Storage Devices

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ISDMICROTAD-16ME

Single-Chip Voice Record/Playback Device 16-Minute Duration

Information Storage Devices 

ISD MicroTAD-16M

Table 2: Opcode Summary

Instruction

Opcode <8 bits>

Address <16 bits>

Operational Summary

POWERUP

SETPLAY

00100XXX

11100XXX <A15–A0>

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

Initiates Playback from address <A15–A0>.

PLAY

11110XXX

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

SETREC

10100XXX <A15–A0>

Initiates a Record operation from address <A15–A0>.

REC

10110XXX

Records from current address until OVF is reached.

SETMC

MC1

11101XXX <A15–A0>

11111XXX

Initiates Message Cueing (MC) from address <A15–A0>.

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

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

STOP

0X110XXX

Stops current operation.

STOPPWRDN 0X01XXXX

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

RINT2

0X110XXX

Read Interrupt status bits: Overflow and EOM.

1. Message Cueing can be selected only at the beginning of a play operation.

2. As the Interrupt data is shifted out of the ISD MicroTAD-16M, 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.

POWER-UP SEQUENCE

The ISD MicroTAD-16M will be ready for an oper-

ation after TPUD (50 ms approximately for 4 KHz

sample rate). The user needs to wait TPUD before is-

suing an operational command. For example, to

play from address 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.

The device will start playback at address 00 and

it will generate an interrupt when an EOM is

reached. It will then stop playback.

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

recording.

6

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