Memory configuration ♦ Three interrupt sources
OTP ROM size: 1K * 16 bits. One internal interrupts: T0, TC0.
RAM size: 48 * 8 bits. One external interrupts: INT0.
Four levels stack buffer
♦ Two 8-bit Timer/Counter
♦ I/O pin configuration T0: Basic Timer with 0.5sec RTC.
Bi-directional: P0, P1, P2, P5. TC0: Auto-reload timer/Counter/Buzzer output
Input only: P1.1.
Programmable open-drain: P1.0. ♦ On chip watchdog timer and clock source is internal
Wakeup: P0, P1 level change trigger low clock RC type (16KHz @3V, 32KHz @5V).
Pull-up resisters: P0, P1, P2, P5.
External Interrupt trigger edge: ♦ Dual system clocks
P0.0 controlled by PEDGE register. External high clock: RC type up to 10 MHz
External high clock: Crystal type up to 16 MHz
♦ 3-Level LVD. Internal high clock: 16MHz RC type. Fcpu is limited to
Fosc/4~Fosc/16.
Reset system and power monitor. Internal low clock: RC type 16KHz(3V), 32KHz(5V)
♦ Powerful instructions ♦ Operating modes
One clocks per instruction cycle (1T) Normal mode: Both high and low clock active
Most of instructions are one cycle only. Slow mode: Low clock only
All ROM area JMP instruction. Sleep mode: Both high and low clock stop
All ROM area CALL address instruction. Green mode: Periodical wakeup by T0 Timer
All ROM area lookup table function (MOVC)
♦ Package (Chip form support)
PDIP 14 pins
SOP 14 pins
SSOP 16 pins
I/O 引脚配置 TC0:自动装载定时/计数器/PWM0/Buzzer 输出。
双向输入输出:P0,P4,P5。 TC1:自动装载定时/计数器/PWM1/Buzzer 输出。
单向输入:P0.4 和复位引脚共享。
具有唤醒功能的引脚:P0 的电平变换。 ♦ 内置看门狗定时器和内部低速 RC 时钟源
上拉电阻:P0,P4,P5。 (16KHz @3V,32KHz @5V)
外部中断触发边沿:
P0.0 由 PEDGE 寄存器控制。 ♦ 双重系统时钟
P0.1 只由下降沿触发。 外部高速时钟:RC,最大 10MHz。
外部高速时钟:晶振,最大 16MHz。
♦ 3 层 LVD 内部高速时钟:RC,最大 16MHz。
复位系统和电源监控器 内部低速时钟:RC 16KHz(3V),32KHz(5V)。.
♦ 5 个中断源 ♦ 操作模式
3 个内部中断源:TC0,TC1,ADC。 普通模式:高低速时钟同时运行。
2 个外部中断源:INT0,INT1。 低速模式:仅低速时钟运行。
睡眠模式:高低速时钟都停止运行。
♦ 功能强大的指令集 绿色模式:由 TC0 定时器周期性的唤醒。