LSI

LS3101

2

Functional Description

1. RC Oscillator /Crystal

The LS3101 can use either a crystal oscillator or RC oscillator to provide the internal timing by

mask option.

2. Program ROM

The LSI3101 has internal 1Kx12 bit ROM providing simple operation. It has four internal stack.

3. Program RAM

The system has 48x4bit of program RAM (00H to 2fH).

4. Buzzer Control

The system can output 4khz/2khz alarm signal by mask option at B[0:1].

5. LCD driver

The system has 16 LCD segment pad with 3 common pads providing 16x3 LCD segment output.

6. I/O pad

The LS3101 has 12 input pad, I[0:11], and 3 output pad R[0:2]. The input pads can be selected (by

mask option) with/without internal pull-high resistor.