GPLB37A5
| Working Voltage (V) | Max. CPU Speed (MHz) | ROM (Byte) | RAM (Byte) | I/O | COMxSEG Option | Bias | Duty | Audio Output | 32K OSC. | Serial I/F | Bus I/F | SPI/UART | WDT | LVD/LVR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.4~5.5 | 5 | 256K | 1216 | 28 | 16X74, 32X64 | 1/5, 1/6 | 1/16, 1/32 | PWM/DAC | ROSC/X'TAL | √ | - | -/√ | √ | √/√ |
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, FCPU = 1.0MHz, FOSC = 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
Data Sheet
GPLB37A5V10_ds.pdf
Confirmation Sheet
GPLB37A5V10_cm.pdf
Application / Engineering Note
AN0213-VDD higher than VLCD issue application note-16.pdf
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