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データシートサーチシステム |
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ISD1700A データシート(PDF) 14 Page - Winbond |
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ISD1700A データシート(HTML) 14 Page - Winbond |
14 / 31 page ![]() ISD1700A SERIES - 14 - Message record indicators: a) When REC goes Low: • If present, SE1 is played and LED flashes once. • Then, the LED stays On to indicate that a recording is in progress. b) When REC goes High or when the memory is full: • If present, SE2 is played and the LED flashes twice, and then remains Off to alert the user that the recording process has been completed. Triggering of REC during a play, erase or forward operation is an illegal operation and will be ignored. 7.1.2 Playback Operation Two playback modes are executed by PLAY , which is internally debounced. a) Edge-trigger mode: Pulsing PLAY Low once initiates a playback operation of the current message. Playback automatically stops at the end of the message. Pulsing PLAY again will re-play the message. During playback, the LED flashes and goes Off when the operation stops. Pulsing PLAY to Low again during playback stops the operation. Under these circumstances, the playback pointer remains at the start of the played message after the operation is completed. b) Sequential Playback mode: If PLAY is held Low constantly, all messages will be played and looped from the current message to its previous message. This looping continues until PLAY is released. After each message, SE1 is played. After the last message has been played, SE2 is played, and then device plays the first message again. During the entire playback operation, the LED flashes. When playback stops, the playback pointer will be placed at the start of the halted message. Triggering PLAY during a record, erase, or forward operation is an illegal operation and will be ignored. 7.1.3 Forward Operation The FWD allows the user to move the playback pointer to the next message in a forward direction. When the pointer reaches the last message, it will jump back to the first message. Hence, the movement is in a circular fashion among the messages. The FWD is debounced internally. The effect of a Low-going pulse on the FWD depends on the current state of the device: a) If the device is in power-down state and the current location of the playback pointer is not the last message: the pointer will advance one message and, if present, SE1 is played. The LED flashes once. |
同様の部品番号 - ISD1700A |
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同様の説明 - ISD1700A |
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