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Products - GPL31B3


Working Voltage (V)Max. CPU Speed (MHz)ROM (Byte)RAM (Byte)I/OCOMxSEG OptionBiasDutyAudio ChannelTone Output(CH)Audio Output32K OSC.LVD
2.4~5.5364K160+3012 I/O2X44, 3X44, 4X44, 5X441/2, 1/31/2, 1/3, 1/4, 1/522ROSC/X'TAL (Mask Option)

General Description

The GPL31B3, an 8-bit CMOS single chip microprocessor, contains RAM, ROM, I/Os, interrupt/wakeup controller, timer, 8-bit PWM audio output and automatic display controller/ driver for LCD. With a dual channel PWM driver, attractive sound effects can be generated easily. Built-in voltage doubler and voltage regulator provide robust and adjustable (16-level) LCD supply voltage to get the best display quality for specific panels. Furthermore, a software controllable standby mode is also implemented for power saving. The GPL31B3 is designed with state-of-the-art technology to fulfill the requirements of LCD applications especially for hand-held products.


  • Built-in 8-bit CPU
    • 160 bytes SRAM
    • 64K bytes ROM
    • Max. CPU clock: 3.0MHz @ 2.4V – 5.5V
    • Programmable CPU clock frequency, 1/2, 1/4, 1/8, 1/16, 1/32 or 1/64 of R-oscillator's clock frequency is available
    • Provides 7 interrupt sources
  • Built-in 8-bit 2-channel PWM outputs
  • Built-in 32.768KHz Crystal / R-oscillator
    • Crystal or R-oscillator (mask option)
    • Crystal oscillator switches from strong to Weak mode automatically
    • Internal time base generator
  • Built-in System R-oscillator
    • Only one resistor is needed
  • Two 16 bits timer/counters
  • Low Voltage Reset / Low Voltage Detect
    • Provides 2.3V low voltage reset function
    • 2.4V/2.6V low voltage detect (Mask option)
  • Low power consumption
    • Operating current: 1.0mA/1.0MHz @ 3.0V
    • Very low standby current : ISTBY < 1.0μA @ 3.0V In standby mode: stop all oscillators
  • Max. 12 general purpose I/O
    • SEG[43:41] can be optioned to IOEF[7:5]
    • 8 IO pins support Key wake-up mode
  • LCD controller / driver
    • 44 segments x 5 commons, max. 220 dots
    • Programmable bias option (1/2,1/3 bias) and duty option (1/2,1/3,1/4,1/5 duty)
    • Built-in voltage doubler and regulator to generate VLCD voltage for LCD driver(Built-in regulator can be disabled)
    • Adjustable 16-level VLCD for various panels 1/3 bias: VLCD (3.0V - 6.0V) 1/2 bias: VLCD (2.0V - 4.0V)
    • Built-in regulator can be disabled 1/3 bias: VLCD = VDD ;VDD2 =2/3 VDD ;VDD1 =1/3 VDD 1/2 bias: VLCD = VDD ;VDD1 =1/2 VDD

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