ISD5216PI datasheet(9/75 Pages) WINBOND

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ISD5216

Publication Release Date: Jan. 31, 2006

- 9 -

Revision B.4

7. FUNCTIONAL DESCRIPTION

The ISD5216 ChipCorder Product provides high quality, fully integrated, single-chip Record/Playback

solutions for 8- to 16-minute messaging applications that are ideal for use in PBX systems, cellular

phones, automotive communications, GPS/navigation systems, and other portable products. The

ISD5216 product is an enhancement to the ISD5116 architecture, providing: 1) A full-duplex Voice

CODEC with

μ-Law and A-Law compander using the I2S and PCM interface ports; 2) A 2.2V

microphone bias supply for reduced noise coupling. This supply can also be used to power down the

external microphone with the system.

Analog functions and audio gating have also been integrated into the ISD5216 product to allow for

easy interfacing with integrated chip sets on the market. Audio paths have been designed to enable

full duplex conversation record, voice memo and answering machine (including outgoing message

playback).

Logic Interface Options of 2.0V and 3.0V are supported by the ISD5216 to accommodate both

portable communication (2.0- and 3.0-volt required) and automotive product customers (5.0-volt

required).

Like other ChipCorder products, the ISD5216 integrates the sampling clock, anti-aliasing and

smoothing filters, and multi-level storage array on a single chip. For enhanced voice features, the

ISD5216 eliminates external circuitry by integrating automatic gain control (AGC), a power

amplifier/speaker driver, volume control, summing amplifiers, analog switches, and a Voice CODEC.

Input level adjustable amplifiers are also included, providing a flexible interface for multiple

applications.

Recordings are stored in on-chip nonvolatile memory cells, providing zero-power message storage.

This unique, single-chip solution is made possible through Winbond’s patented multilevel storage

technology. Voice and audio signals are stored directly into solid-state memory in their natural,

uncompressed form, providing superior quality voice and music reproduction.

SPEECH/SOUND QUALITY

The ISD5216 ChipCorder product can be software configured 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 "Input Sample

Duration

" table below compares filter pass band and product durations.

DURATION

To meet end-system requirements, the ISD5216 device is a single-chip solution, which provides 8 to

16 minutes of voice record and playback, depending on the sample rates defined by the customer's

software.

Input Sample Rate to Duration Input Sample

Rate (kHz)

Duration

1 (Minutes)

Typical Filter Pass Band (kHz)

8.0

8 min 3 sec

3.7

6.4

10 min 4 sec

2.9

5.3

12 min 9 sec

2.5

4.0

16 min 6 sec

1.8

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