ISD1700A View Datasheet(PDF) - Winbond

Part Name

Description

Manufacturer

ISD1700A

Multi-Message Single-Chip Voice Record & Playback Devices

Winbond 

ISD1700A SERIES

b) If the device is in power-down state and the current location of the play pointer is the last

message: the pointer will advance to the first message and, if present, SE2 is played. The

LED will flash twice.

c) If the device is currently playing a message that is not the last one:

• Playback is halted.

• The playback pointer is advanced one message.

• If present, SE1 is played.

• Playback of the next message begins.

• The LED flashes during this entire process.

d)If the device is currently playing a message that is the last one:

• Playback is halted.

• The playback pointer is advanced to the first message.

• If present, SE2 is played.

• Playback of the first message begins.

• The LED flashes during this entire process.

Triggering of the FWD operation during an erase or record operation is an illegal operation

and will be ignored.

7.1.4 Erase Operation

Erasing individual message takes place only if the playback pointer is at either the first or the

last message. Erasing individual messages other than the first or last message is not

possible. However, global erase can be executed at any message location and will erase all

messages. These two erase modes are characterized as follows:

a) Individual Erase: Only the first or last messages can be individually erased. Pulsing

ERASE Low performs actions dependent upon the current location of the playback

pointer:

• If the device is idle and the playback pointer is currently pointing to the first message:

o First message is erased.

o SE2, if present, will be played and the LED will flash twice.

o Playback pointer will be updated to point to the new first message (previously, the

second message).

• If the device is idle and the playback pointer is currently pointing to the last message:

o Last message is erased.

o SE2, if present, will be played and the LED will flash twice.

o Playback pointer will be updated to point to the new last message (previously, the

second to last message).

Confidential

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Publication Release Date: March 28, 2005

Revision A0

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