The GPRT5509A is a high-integrity, high-performance integrated circuit for systems. Its low cost, combined with its complete array of functions, makes it the ideal choice for speech recording /playback application. The GPRT5509A consists of a 16-bits µ’nSP™ CPU and a 10-bits DAC/ADC. With a minimum of components, the GPRT5509A incorporated A2000 algorithm (16Kbps) to perform high quality voice encoding/decoding. It provides a wide range of functions, including voice activity detection, stereo tape input driver, repeating with changed speed, LED drivers, and SDRAM interface.

• SUNPLUS 16-bit µ’nSP™ CPU
  • SRAM 1.75K x 16 bits
  • ROM 20K x 16 bits
• Clock
  • build in 3.58MHz/455KHz crystal driver
  • An internal PLL for CPU clock (28MHz/35MHz/43MHz)
• Operating voltage
  • CPU operating voltage : 2.4V - 3.6V
  • ADC/DAC/AGC operating voltage: 2.7V - 3.6V
• Operation Modes
  • Operating mode, Halt mode and Standby mode
• Timer/Counter
  • One 16-bit timer/counter
  • One 8-bit timer/counter for ADC sample rate
• Power management for system reliability
  • Low-Voltage-Reset function (Mask Option)
  • Power-On-Reset function
  • Watchdog reset
• Analog Front End
  • 10bits ADC with 8K/16K sample rate
  • AGC with 26dB dynamic range
  • Microphone input driver
  • Stereo Tape input driver
• Speaker driver
  • Left channel speaker driver for 8?/0.5W speaker
  • Right channel speaker driver for 32?/32mW earphone
• 9 Interrupt / Wakeup Sources (INT / WP)
  • IOB[7:6] edge-triggered
  • SDRAM read/write finished
  • Timer overflow
  • T16KHz, T8K,T2KHz, T128Hz, T8Hz
• SDRAM interface
  • support 64M/128M bits SDRAM with 1/2/4/8 bits data bus.
• Up to 22 I/O pins
  • IOA[7:0]:NMOS open drain output, CMOS input with pull low Resistor
  • IOB[7:0]:CMOS input / output,
• A2000 16Kbps compression algorithm for recording operation
  • Object code of A2000 encoder/decoder provided
• Miscellaneous
  • Multiplication with cumulative addition for user’s digital filters