以下我们对SM79108L单片机基本功能特征的简单介绍，仅供参考：

Nested interrupt
Two priority level interrupt
A serial I/O port
Features
Working voltage: 3.0V ~ 3.6V For L Version
4.5V ~ 5.5V For C Version
General 8052 family compatible
12 clocks per machine cycle
8 KB internal flash memory
256 bytes on-chip data RAM
Three 16 bit timers/counters
Four 8-bit I/O ports for PDIP package
Four 8-bit I/O ports + one 4-bit I/O ports for PLCC or
QFP package
A14 x 4 LCD driver (P0, P2, ALE, PSEN)
1 Channel SPWM (P1.2)
1 Channel PWM (P1.5)
Full duplex serial channel
Bit operation instruction
Industrail Level
8-bit unsigned division
8-bit unsigned multiply
BCD arithmetic
Direct addressing
Indirect addressing
Power save modes: Idle mode and power down mode
Code protection function
One watch dog timer (WDT)

Low EMI (inhibit ALE)

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