特点
•只有47条指令
•所有指令都是单周期除了程序分支是两个周期
•13位宽指令
•所有ROM/ EPROM区GOTO / FGOTO的指令
•所有ROM/ EPROM的面积子程序CALL/ FCALL的指令
•8位超宽数据通道
•5级深硬件堆栈
•4K×13位芯片上的EPROM/ ROM
•144×8位片上的通用寄存器（SRAM）
•工作速度：DC-20 MHz的时钟输入
DC-100 ns指令周期
•直接，间接寻址模式进行数据访问
•8位实时时钟/计数器（定时器），8位可编程预分频器
•内部上电复位（POR）
•内置低电压检测（LVD）欠压复位（BOR）
•上电复位定时器（PWRT）和振荡器启动定时器（OST）
•在芯片内部振荡器的看门狗定时器（WDT）的可靠运行和软件看门狗
启用/禁用控制
•三个I / O端口IOA，IOB独立方向控制和IOC
•软洁具I / O pull-high/pull-down的或漏极开路控制
•一个内部中断源：定时器0溢出;两个外部中断源：INT0引脚，INT1引脚
•唤醒从休眠端口B/IOC4/IOC5输入下降
•省电休眠模式
•可编程代码保护
•可选的振荡器选项：
- ERC：外部电阻/电容振荡器
- XT：晶体/陶瓷振荡器
- HF：高频晶体/陶瓷振荡器
- LF：低频率晶体振荡器
•宽工作电压范围：
- EPROM：2.3V至5.5V
- ROM：2.3V至5.5V

FEATURES
• Only 47 single word instructions
• All instructions are single cycle except for program branches which are two-cycle
• 13-bit wide instructions
• All ROM/EPROM area GOTO/FGOTO instruction
• All ROM/EPROM area subroutine CALL/FCALL instruction
• 8-bit wide data path
• 5-level deep hardware stack
• 4K x 13 bits on chip EPROM/ROM
• 144 x 8 bits on chip general purpose registers (SRAM)
• Operating speed: DC-20 MHz clock input
DC-100 ns instruction cycle
• Direct, indirect addressing modes for data essing
• 8-bit real time clock/counter (Timer0) with 8-bit programmable prescaler
• Internal Power-on Reset (POR)
• Built-in Low Voltage Detector (LVD) for Brown-out Reset (BOR)
• Power-up Reset Timer (PWRT) and Oscillator Start-up Timer(OST)
• On chip Watchdog Timer (WDT) with internal oscillator for reliable operation and soft-ware watch-dog
enable/disable control
• Three I/O ports IOA, IOB and IOC with independent direction control
• Soft-ware I/O pull-high/pull-down or open-drain control
• One internal interrupt source: Timer0 overflow; Two external interrupt source: INT0 pin, INT1 pin
• Wake-up from SLEEP by Port B/IOC4/IOC5 input falling
• Power saving SLEEP mode
• Programmable Code Protection
• Selectable oscillator options:
- ERC: External Resistor/Capacitor Oscillator
- XT: Crystal/Resonator Oscillator
- HF: High Frequency Crystal/Resonator Oscillator
- LF: Low Frequency Crystal Oscillator
• Wide-operating voltage range:
- EPROM : 2.3V to 5.5V
- ROM : 2.3V to 5.5V