Products - GPLB37A5

General Description

The GPLB37A5, an 8-bit CMOS microprocessor, contains 1216 bytes of working RAM, 256K bytes of ROM, 28 I/Os, interrupt/wakeup controller, UART for serial communication and Serial SRAM interface for memory expansion, and automatic display controller/driver for LCD. It also features one PWM/DAC driver with two audio channels to produce attractive sound effects easily. Its large ROM area can be used to store both program and audio data. The built-in UART speeds up data transmission between two devices. Furthermore, a SLEEP (power-down) function is also built in to extend power life. The GPLB37A5 is designed with GENERALPLUS state-of-the-art technology to fulfill LCD application needs, specifically for hand-held products.

Features

• Built in 8-bit processor
• 1216 bytes of SRAM
• 256K bytes of ROM
• Max. operating speed:
  4.0MHz @ 2.4V - 3.6V
  5.0MHz @ 3.6V - 5.5V
• Programmable CPU clock: /1, /2, /4, /8, /16, /32, /64 of ROSC Frequency.
• 6 wake-up sources
• 7 interrupt sources
• Universal Asynchronous Receiver and Transmitter (UART)
• Serial SRAM interface
• Key scan function
• SEG[15:0] can be used to send key scan output
• Programmable LCD driver
• 74 segments, 16 commons, maximum 1184 dots or
  64 segments, 32 commons, maximum 2048 dots
• 1/5, 1/6 bias; 1/16, 1/32 duty capability
• 296 bytes dedicated LCD RAM
• Built-in voltage regulator to generate VLCD for LCD driver
• 32-level contrast control (2.45V - 5.75V, in 1/5 bias)
  32-level contrast control (2.95V - 6.85V, in 1/6 bias)
• Power saving SLEEP mode
• Low Voltage Detector
• 8-level 2.9V - 2.2V/4.35V - 3.3V detection
• 2.2V Low voltage reset
• Low power consumption:
• 600mA typical @ 3.0V, F_CPU = 1.0MHz, F_OSC = 4.0MHz
• 25mA typical halt current @ 3.0V
• <1mA typical standby current @ 3.0V
• Peripherals
• Max. 28 I/O pins (PA[7:0], PB[5:0], PC[7:0], PD[5:0])
• Dedicated I/Os: PA[0:5]
• Shared pin I/Os:
  PA[6:7] / SEG[63:62]
  PC[0:1] / SSRAM SCK, SDA/SEG[61:60]
  PC[3:2] / UART Rx/Tx
  PC[4:7] / SEG[73:70] / COM[25:22]
  PB[0:5] / SEG[69:64] / COM[21:16]
  PD[0:5] / COM[31:26]
• 32.768KHz oscillator circuit for RTC
• RC-oscillator (only one resistor is needed)
• Two 16-bit reloadable timer/counters
• 8-bit DAC resolution, 2-channel PWM/DAC audio outputs
• Watchdog Timer for reliable operation  
• Wide operating voltage range:
• 2.4V - 3.6V
• 3.6V - 5.5V