LINEAR CODEC FOR DIGITAL CELLULAR TELEPHONE

The µPD9930 is a +3 V single power operation, low power consumption linear CODEC LSI developed for digital cellular telephone use.
CODEC has a wide dynamic use.
This IC also features a microphone/receiver amplifier, a tone generator, DAI (Digital Audio Interface: conforming to GSM11.10), and a power-saving function. These functions can be controlled by microcontroller.
In addition, 21 mW (TYP.) low power consumption is enabled during 3 V operation.

FEATURES
• +3 V single power supply
• Low power consumption
   In operation: 7 mA (TYP.) (VDD = 3 V)
   In stand-by mode: 50 µA (TYP.) (VDD = 3 V)
• CODEC
   • 13-bit precision linear coding
   • Transmission level can be controlled by microcontroller.
• Analog input/output funciton
   • Low noise microphone amplifier
   • High output receiver amplifier
      Piezo-electric receiver can be directly driven.
      Gain canbe controlled by microcontroller.
   • On-chip amplifier for accessory input/output
• Tone generator
   • Frequency, generating pattern and gain can be controlled by microcontroller.
   • DTMF generation function
   • Various service tone generation function
   • GSM triple tone generation function
   • Desired tone frequency can be registered (0.3 to 3.4 kHz)
• DAI
   • Conforming to GSM11.10
   • Test mode can be set by terminal or microcontroller command.
• Stand-by mode
   • Rise time at time of stand-by clearing: 30.5 ms (TYP.)
• Master clock generation PLL (external clock input: 8 kHz)
• Tone interrupt pattern output function
• Ringer output function