ISD4004 Series
Table 2:Opcode Summary
Instruction
POWERUP
SETPLAY
PLAY
SETREC
REC
SETMC
MC
1
Opcode <8 bits>
Address <16 bits>
00100XXX
11100XXX <A15–A0>
11110XXX
10100XXX <A15–A0>
10110XXX
11101XXX <A15–A0>
11111XXX
Operational Summary
Power-Up: Device will be ready for an operation after T
PUD
.
Initiates Playback from address <A15–A0>.
Playback from the current address (until EOM or OVF).
Initiates a Record operation from address <A15–A0>.
Records from current address until OVF is reached.
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.
Stops current operation.
Stops current Operation and enters stand-by (power-down) mode.
Read Interrupt status bits: Overflow and EOM.
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.
STOP
STOPPWRDN
RINT
2
1.
0X110XXX
0X01XXXX
0X110XXX
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
T
PUD
(25 ms approximately for 8 KHz sample rate).
The user needs to wait T
PUD
before issuing an opera-
tional command. For example, to play from ad-
dress 00 the following programing cycle should be
used.
Playback Mode
1.
2.
3.
4.
Send POWERUP command.
Wait T
PUD
(power-up delay).
Send SETPLAY command with address 00.
Send PLAY command.
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.
Record Mode
1.
Send POWERUP command.
2.
Wait T
PUD
(power-up delay).
3.
Send POWERUP command.
4.
Send SETREC command with address 00.
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
Voice Solutions in Silicon
™
WINBOND [ WINBOND ]
