General Description:

The SG8LT128P is an 8-bit single chip micro-controller. Its memory capacity includes 144*8 bits SRAM and 4K *14 bits OTP ROM. Other features include timer RTC, timer TCC, three groups I/O port.
It can also provide the interrupt function and the wakeup function from sleep and idle mode.
The SG8LT128P can play dual tone melody and it has touch sensor function and LCD driver
function. The LCD driver is capable of driving up to 32 segments and up to 4 commons. The LCD driver
supports 1/2 bias, 1/3bias and 1/3 duty, 1/4 duty.

Features:

Microcontroller Features:

• Operating voltage: 2.4V~5.5V
• Operating frequency up to 4MHz
• 4K*14 bits OTP ROM
• 144*8 bits SRAM

3 groups GPIO

－ P1.0~P1.7: GPIO, segment driver port, Key Scan function
－ P3.0~P3.7: GPIO, touch sensor keys; pullup function
－ P4.0~P4.7: GPIO; pullup function, wake-up function and external interrupt function

8 level stacks for subroutine nesting

Clock Sources

－ 32768Hz crystal oscillator with external crystal.
－ RC oscillator with external resistor.(up to 4MHz.)
－ 1.6MHz RC oscillator with internal resistor

Oscillator mode

－ crystal oscillator work only
－ crystal oscillator and RC oscillator work together
－ RC oscillator work only

8-bit Timer TCC with overflow interrupt
Watchdog Timer (WDT) with its own on-chip RC oscillator to prevent system stand still
8-bit prescaler for TCC and WDT
8-bit Timer RTC with overflow interrupt
16-bit Timer TIMER1 with overflow interrupt

6 hard interrupt source:

－ RTC overflow interrupt
－ 8-bit timer TCC overflow interrupt
－ 16-bit timer TIMER1 overflow interrupt
－ touch sensor compare complete interrupt
－ P4.0 input status change interrupt
－ P4.1 input status change interrupt

Built-in power on reset (POR).
Oscillator Start-up Timer (OST)
Built-in low power voltage reset (LVR).
Package:LQFP64L(12mm×12mm)
LCD Module Features:
Operation voltage: 3V.
Two types of driver mode: 1/2 bias, 1/3duty and 1/3 bias, 1/4 duty.
Up to 128(4*32) dots
Key scan function supported on 8 shared Segment ports. P1.0 ~ P1.7 /SEG<24>~SEG<31>

Touch Sensor Module Features:

8 touch pads (P3.0~P3.7)
Touch sensor can work at RC oscillator or Crystal oscillator
16-bit timer TIMER1 with overflow interrupt and wakeup function
Touch sensor compare complete interrupt and wakeup function
2.3V output regulator can be turn on or turn off by software(When the regulator is closed, the
reference voltage Vref selection VDD, directly to the PAD Vref to the VDD bonding)

Dual tone melody generator:

PWM mode driver, the drive current can be 20mA / 40mA / 80mA / 160mA

Clock Source : RC oscillator

- 1.6MHz RC oscillator with internal resisitor
- When RC oscillator selects external resisitor, the frequency must be 2MHz or 4MHz

System mode:

When crystal oscillator and RC oscillator work together, MCU supports four work modes to
reduce the current consumer
Normal: MCU, crystal oscillator and RC oscillator turn on
Slow: MCU, crystal oscillator turn on, RC oscillator turn off
Idle: MCU, RC oscillator turn off, crystal oscillator turn on
Sleep: MCU, crystal oscillator and RC oscillator turn off
When crystal oscillator work only, MCU supports three work modes to reduce the current
consumer.

Normal: MCU and crystal oscillator turn on
Idle: MCU turn off, crystal oscillator turn on
Sleep: MCU and crystal oscillator turn off
When RC oscillator work only, MCU supports three work modes to reduce the current consumer
Normal: MCU and RC oscillator turn on
Idle: MCU turn off, RC oscillator turn on
Sleep: MCU and RC oscillator turn off