Products - GPT8P340A1 (OTP)

GPT8P340A1 (OTP) Copy Link.

Working Voltage (V)Max.CPU Speed (MHz)Flash (Byte)RAM (Byte)Direct Touch I/OTime/CounterAudio Output32K OSC. (Mask Option) ROSC32K OSC. (Mask Option) X'TALSPI/UARTWDT (S/W Option)LVD/LVRSounding Processing Unit
2.7~5.5121M1.5K4616-bit x214-bit Push PullVV1/-VV/V8 Channels

General Description

The GPT8P340A1, an 8-bit microprocessor, features 1M bytes OTP ROM, 1536 bytes working RAM,512 bytes AUX RAM, 46 I/Os, interrupt/ wakeup controller, two 16-bit timers, two SPI interfaces, a 14-bit DAC with push-pull amplifier for driving speaker directly. The GPT8P340A1 operates over a wide voltage range from 2.3V through 5.5V, plus Low Voltage Reset function to assure system still functions properly when power drops below certain level. The microprocessor can implement software for audio processing functional control and others. The GPT8P340A1 equips a high performance SPU voice engine to achieve 8-channel voice with ADPCM/PCM data. It can produce attractive and high resolution sound easily. Plus, it features one 14-bit DAC with push-pull amplifier for driving speaker directly. Its large memory area can be used to store both program and audio data. There is a Serial Peripheral Interface (SPI) controller built-in to facilitate communicating with other devices. Furthermore, a SLEEP (power-down) function is also built-in to extend battery life.


  • 8-bit micro-processor
  • 1M bytes OTP ROM
  • 1536-byte SRAM
  • 512-byte AUX RAM
  • Operating voltage: 2.3V – 5.5V
  • Max. CPU operating speed:
    • 12.0MHz @ 2.7V – 5.5V
    • 8.0MHz @ 2.3V – 3.6V
  • Programmable CPU clock: /2, /4, /8, /16, /32, /64 and /128 clock frequency
  • Six wake-up sources
  • 23 IRQs & 4 NMI Interrupts
  • Internal built-in regulator to supply core power (3.3V, for 3-battery application).  Also internal built-in regulator can be turned off and external 3.6V power is used to supply core power (for 2-battery application).
  • SPU(Sound Processing Unit) engine with 8 voice channels
  • Supports 4/5 bit ADPCM and 8/16 bit PCM data format
  • Transform 4/5 bit ADPCM data to 14 bit data to play high quality sound
  • Supports special tag such as Silence Tag, Event tag
  • One software channel with noise filter to play high quality sound.
  • Low Voltage Detector

8-level (2.3V/2.4V/2.6V/2.9V/3.0V/3.3V/3.6V/4.0V) voltage detector

  • Low Voltage Reset
  • Peripherals
  • Max. 46 I/O pins (PA[7:0], PB[7:0], PC[5:0], PD[7:0], PE[7:0] , PF[7:0])
  • Eight I/Os with high sink current for LED application
  • Key wakeup/interrupt function
  • Built-in 32.768KHz oscillator circuit for real time clock function (X'tal or R-osc)
  • Built-in R-oscillator (external resistor is needed) or X'tal or PLL for system operating clock
  • Internal time base generator
  • Two 16-bit reloadable timer/counters
  • Watchdog timer
  • 14-bit DAC with push-pull amplifier for driving speaker directly
  • IR output
  • Hardware PWMIO
  • Two SPI serial interface I/Os
  • Powerful 8-ch Sound Processing Unit (SPU)
    • Variable tone-color sampling rate: max = 96KHz @ SPU_clock = 24MHz
    • 8-voice polyphony
    • Supports PCM/ADPCM tone-color table

Data Sheet

GPT8P340A1V13_ds.pdf   Copy Link.

Confirmation Sheet

GPT8P340A1V11_cm(epdf).pdf   Copy Link.
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