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Products - GPC3341A(OTP)


Working Voltage (V)Max.CPU Speed (MHz)ROM (Byte)RAM (Byte)I/OAudio Output (Mask option) DACAudio Output (Mask option) PWMVolume Control

General Description

GPC3341A is the OTP (One-Time-Programming) version of the GPC3 family. GPC3341A is embedded with an 8-bit processor, 1M bytes OTP ROM, 128-byte working SRAM, three sets of 12-bit timer/counters, 24 general I/Os, a 3-channel mixer, a pair of 12-bit PWM outputs and a Real Time Clock(RTC). The microprocessor can implement software based on audio processing, functional control and others. For audio processing, melody and speech can be mixed into one output. It operates a wide voltage range from 2.0V through 5.5V, and it also features a Low Voltage Reset function to assure the system is capable of operating under a low voltage condition. In addition, GPC3341A provides sleep mode for power saving. It can be awakened from sleep mode by interrupting sources or changing IO's states. With the high cost/performance, GPC3341A is one of the most suitable speech engines in the industry for vocal applications.


  • Wide Operating Voltage: 2.0V * - 5.5V
    * The lowest operating voltage depends on LVR (Low Voltage Reset) level. Typical LVR voltage is 2.0V but with +/- 0.1V deviation possibility.
  • Working voltage with 6MHz system clock: 2.2V ** - 5.5V
  • Working voltage with 8MHz system clock: 2.4V ** - 5.5V
    ** When using internal oscillator, the system clock would start to slow down at lowest working voltage(6MHz at 2.2V, 8MHz at 2.4V)
  • 1M bytes ROM
  • 128-byte working SRAM
  • Built-in internal or external RC oscillator嚗ode option嚗?/li>
  • Built-in internal RC oscillator 8MHz or 6MHz嚗ode option嚗?/li>
  • Approx. 340 seconds speech @6KHz sampling rate with 4-bit ADPCM
  • Standby mode (Clock Stop mode) for power savings. Max. 5.0uA @ 4.5V
  • Bit programmable 24 general I/Os
  • Four I/Os with high sink current for LED application
  • All general IOs provide 1M pull-low function to prevent current leakage while pressing the key (IOs to VDD)
  • Three 12-bit timers/counters
  • 8 IRQs & 1 NMI interrupt
  • Three wake-up sources
  • Low Voltage Reset (LVR) function
  • Watchdog function
  • IR function
  • RTC function
  • Four sets of hardware PWMIO support LED outputs with 256-level brightness control
  • A 3-channel mixer with melody or ADPCM/PCM input
  • A pair of PWM outputs with volume control

Confirmation Sheet

GPC3341AV12_cs.pdf   Copy Link.

Application / Engineering Note

AN0113-GPC3_TimerInitialBeforeEnableTimerInterrupt.pdf   Copy Link. AN0129-32768_Crystal_Oscillation_Application_Note-16.pdf AN0149-GPC3_Integrated_Application_Note-16.pdf   Copy Link. COB_Bonding_Suggestion_20130910.pdf   Copy Link.

Data Sheet

GPC3XXXXV24_ds.pdf   Copy Link.
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