GENERAL DESCRIPTION
   GPCR20A is a highly integrated circuit that contains all of the necessary functions for providing high quality voice recording and playback. In order to provide the high quality voice, 4 times over sampling and 19 level digital filter technology are used to reduce the noise level. Easy-to-use, low power consumption and compact size are the tremendous features of GPCR20A. 

FEATURES
◾ Nature, high-quality playback suitable for voice, music, and
   tones.
◾ Single-chip voice record and playback device.
◾ Microphone differential input and preamplifier output
◾ Low pass amplifier input
◾ Automatic gain control
◾ PWM speaker driver
◾ Built in 128Kx4bits SRAM, address space (0-1FFFF)
◾ Wide operating voltage range: 2.4V - 5.5V
◾ Frequency of playing and recording: 4K - 10KHz
◾ 20 sec recording time @ 6.0KHz
◾ One voice box with 20 sec or 2 voice boxes with10 sec
   (Bonding option select one or two voice box)
◾ Edge or level-hold recording trigger
   (Bonding option select edge or level trigger)
◾ Prompt beep sound (Bonding option select beep or not)
◾ LEDs indication for recording starting and ending or playing
   starting and ending.
◾ Edge trigger for playback triggers.
◾ Auto-playback function after ending of recording (Bonding
   option select auto-playback or not).