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Products - GPTC6605A


Working Voltage(V)Max. CPU Speed(MHz)ROM(byte)RAM(byte)I/OMax. LCD DotsCOM xSEG OptionUART/IRDATimerADCDACTone OutputBattery DetectFSK DecoderDTMFTransceiverBuilt-in DC-DCSDRAM Interface
2.5~5.52872K3K328968x56 16 x56‧/‧2--

General Description

The GPTC6605A, a newly invented micro-controller for caller ID type I / II services and vocal dialer products, carries SUNPLUS newest 16-bit μ'nSPTM CPU technology. The μ'nSPTM high processing speed ensures the GPTC6605A is able to facilitate the sophisticated digital signal processing. In addition to the advanced μ'nSPTM technology, other primary functions include RAM, ROM, IO, interrupt controller, two timer/counters, LCD controller/driver, 10-bit Analog-to-Digital Converter (ADC), Dual-Tone-Multi-Frequency (DTMF) generator, melody Digital-to-Analog Converter (DAC) output, and UART/IrDA interfaces. For power savings, a software controllable standby mode and adjustable CPU clock can be used to achieve the best power management.
The GPTC6605A is able to drive LCD directly, and to perform complex function and arithmetic. An external 32768Hz crystal oscillator produces a steady time base for clock function. The flexible LCD controller and regulator make the LCD driver achieving the best display quality.
The GPTC6605A can be broadly used in telecom products such as multifunction telephone dialer with/without Caller Identification and CAS tone detection. The GPTC6605A provides, not only the latest telecom technology, but also the full service and support of GENERALPLUS.


  • SUNPLUS 16-bit μ'nSP™ CPU
    • SRAM 1.5K x 16 bits
    • ROM 36K x 16 bits
  • Clock
    • An external 32768Hz crystal for dialing and demodulation
    • Built-in RC-oscillator and XTAL oscillator for CPU clock
    • /1, /2, /4, /8 of RC-oscillator clock output for CPU
    • /1, /2, /4, /8, /16, /32, /64 of XTAL oscillator clock output for CPU
  • Operating voltage
    • External voltage (LVDD): 2.5V - 5.5V
    • CPU operating voltage (VDD): 2.4V - 2.8V
    • AFE operating voltage (AVDD): 2.4V - 2.8V
    • Low Voltage Reset: 2.1V
  • Operation Modes
    • Operating mode, Standby mode, and Halt mode
  • Timer/Counter
    • One 16-bit timer/counter
    • One 8-bit timer
  • Power management for system reliability
    • Low-Voltage-Reset function
    • Power-On-Reset function
    • 8-level battery voltage detect
    • Watchdog reset (derived from 32768Hz crystal)
  • 12 Interrupt / Wakeup Sources (INT / WP)
    • IOA[7:0], IOC[1:0] edge-triggered
    • Ring Detect / Line Signal Detector
    • UART / IrDA Ready
    • Timer A / Timer B overflow
    • T32KHz, T2KHz, T128Hz, T8Hz (derived from 32768Hz)
  • LCD Driver
    • Typical 16 COM x 40 SEG (max. 56 SEGs)
    • several SEG pins shared pad with IO ports
    • bias: 1/4, duty: 1/8, 1/16
  • Up to 32 I/Os max.
    • IOA[5:0]: programmable pull-high, wakeup / interrupt
    • IOA[7:6]: programmable pull-high / low, wakeup / Interrupt
    • IOB[5:0]: COMS output, IOB[7:6] NMOS open drain
    • IOC[4:0]: COMS output, IOC[7:5], NMOS open drain
    • IOD[7:0]: CMOS I/O
    • IOD[1]: CMOS I/O, can be programmed as TONE output
    • several I/O pins shared pad with SEGs and other functions
  • Analog Front End
    • Op amp for the twisted pair telephone line
    • 5-stage programmable PGA
    • 10-bit A/D, with sample-rate up to 16KHz, 4 input channels
  • DTMF / FSK demodulation and CAS tone detection
    • Object code of DTMF and FSK decoders are provided
    • Object code of DTMF encoder is provided
    • Compatible with Bell 202, and ITU V.23 FSK specifications
    • FSK/DTMF decoder auto-select function
    • Digitized algorithm for CAS tone detection
  • Miscellaneous
    • Ring / Line Signal Detector
    • 2 DAC output pins for DTMF output and melody / speech
    • Multiplication with cumulative addition for user's digital filters
    • Built-in UART and IrDA interface

Confirmation Sheet

GPTC6605AV14_cm.pdf   Copy Link.

Application / Engineering Note

AN0020-power configuration GPTC7605A vs. GPTC6605A-16.pdf AN0129-32768_Crystal_Oscillation_Application_Note-16.pdf
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