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ISD5116SD Datasheet(PDF) 6 Page - Winbond |
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ISD5116SD Datasheet(HTML) 6 Page - Winbond |
6 / 57 page October 2000 Page 5 1. OVERVIEW 1.1 SPEECH/SOUND QUALITY The ISD5116 ChipCorder product can be configured via software to operate at 4.0, 5.3, 6.4 and 8.0 kHz sampling frequencies, allowing the user a choice of speech quality options. Increasing the duration decreases the sampling frequency and bandwidth, which affects sound quality. The table in the following section compares filter pass band and product durations. 1.2 DURATION To meet end-system requirements, the ISD5116 device is a single-chip solution, which provides from 8 to 16 minutes of voice record and playback, depending on the sample rates defined by customer software. Input Sample Rate (kHz) Duration 1 Typical Filter Knee (kHz) 8.0 8 min 44 sec 3.4 6.4 10 min 55 sec 2.7 5.3 13 min 6 sec 2.3 4.0 17 min 28 sec 1.7 1. Minus any pages selected for digital storage 1.3 FLASH STORAGE One of the benefits of ISD’s ChipCorder technology is the use of on-chip nonvolatile memory, which provides zero-power message storage. The message is retained for up to 100 years (typically) without power. In addition, the device can be re-recorded over 10,000 times (typically) for the digital messages and over 100,000 times (typically) for the analog messages. A new feature has been added that allows memory space in the ISD5116 to be allocated to either digital or analog storage when recorded. The fact that a section has been assigned digital or analog data is stored in the Message Address Table by the system microcontroller when the recording is made. 1.4 MICROCONTROLLER INTERFACE The ISD5116 is controlled through an I 2C 2-wire interface. This synchronous serial port allows commands, configurations, address data, and digital data to be loaded to the device, while allowing status, digital data and current address information to be read back from the device. In addition to the serial interface, two other pins can be connected to the microcontroller for enhanced interface. These are the RAC timing pin and the INT pin for interrupts to the controller. Communications with all the internal registers are through the serial bus, as well as digital memory Read and Write operations. 1.5 PROGRAMMING The ISD5116 series is also ideal for playback-only applications, where single or multiple messages may be played back when desired. Playback is controlled through the I 2C interface. Once the desired message configuration is created, duplicates can easily be generated via a third-party programmer. For more information on available application tools and programmers, please see the ISD web site at www.winbond-usa.com |
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