isd5216 Winbond Electronics Corp America, isd5216 Datasheet - Page 67

• Manufacturer Part Number: isd5216
• Description: 8 To 16 Minutes Voice Record/playback Device With Integrated Codec
• Manufacturer: Winbond Electronics Corp America

11. TYPICAL APPLICATION CIRCUIT
APPLICATIONS
The ISD5216 is a single chip solution for voice and analog storage that also includes the capability to
store digital information in the memory array. The array may be divided between analog and digital
storage, as the user chooses, when configuring the device.
Looking at the block diagram on the following page, one can see that the ISD5216 may be very easily
designed into a cellular phone. Placing the device between the microphone and the existing baseband
chip takes care of the transmit path. The SDI/SDIO of the baseband chip is connected to the
SDIO/SDI of the ISD5216. Two pins are needed for the I
storage.
Starting at the MICROPHONE inputs, the input signal at the MICROPHONE inputs can be routed in
the following ways:
In addition, if the phone is inserted into a "hands-free" car kit, then the signal from the pickup
microphone in the car can be passed through to the same places from the AUX IN pin and the
phone's microphone is switched off. In this scenario, the other party's voice from the phone would be
played into the PCM IN input and passed through to the AUX OUT pin that would drive the car kit's
loudspeaker.
x
x
x
x
directly through the Voice band CODEC of the ISD5216 chip, then through the SDIO pin, to
output the digital PCM signal.
through the AGC amplifier, before it is routed to the voice band CODEC.
through the AGC amplifier to the storage array
through the AGC amplifier and mixed with an analog voice band CODEC signal coming from
the digital SDI pin
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C digital control and digital information for
Publication Release Date: Jan. 31, 2006
INT
SCL
SDA
ISD5216
Revision B.4