Products - GPL081A1

GPL081A1 Copy Link.

Working Voltage (V)Max. CPU Speed (MHz)ROM (Byte)RAM (Byte)I/OCOMxSEG OptionBiasDutyTone Output (CH)32K OSC.WDTLVD/LVR
1.2~ I/O, 6 I2X32, 3X32, 4X32, 5X321/2, 1/31/2, 1/3, 1/4, 1/51ROSC/X'TAL-/√

General Description

GPL081A1, a special designed CMOS 8-bit microprocessor by Generalplus, offers the best cost/performance ratio in the industry. It combines RAM, ROM, I/Os, an interrupt controller, and an automatic display controller/driver in a small package. One of its extraordinary features is the capability of operating in low voltage range, from 1.2V ~ 1.7V. The Power Down Mode keeps LCD being displayed when CPU is in standby mode, but consumes only less than 3.5μA. Not only GPL081A1 is capable of displaying LCD, but it also can process complex instructions and functions as well. The development team has designed GPL081A1 to cover many application fields such as calculator, watch and other LCD related products required only one battery supply.


  • Built-in 8-bit RISC processor
  • 128-byte SRAM
  • 7.5K-byte ROM
  • CPU frequency: 300KHz or 500KHz (mask option) @ 1.5V (dependent VDD)
  • Built-in RC oscillator
  • Built-in 32.768KHz oscillator circuit for real clock function
  • Watch dog mode (1Hz or 0.5Hz)
  • Low operating voltage: 1.2V - 1.7V
  • Low standby current, ISTBY < 1μA
  • LCD matrix: 28 - 32 segments, 4 (or 5) commons
  • 12 general I/O pins (segment 29, 30, 31, 32 can be defined as I/O; ABB1 can be optioned to 5th common)
  • LCD 1/2, 1/3 bias, 1/2, 1/3, 1/4, 1/5 (mask option) duty
  • One 8-bit timer
  • 6 interrupt sources (Timer, T16Hz, T2Hz, 128Hz, 2KHz, external interrupt)
  • Power down mode (wake-up source: key input, T2Hz, T16Hz, timer)

Data Sheet

GPL081A1V14_ds.pdf   Copy Link.

Confirmation Sheet

GPL081A1V20_cm.pdf   Copy Link.

Application / Engineering Note

AN0052-8 bit LCD un-expected image issue-16.pdf   Copy Link.
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