微控制器IC

TC78451P22是一顆兼容EMC78451的微控制器，當使用451模式時，可使用451的指令系統和比較器；當選擇EXT模式時可使用擴展的指令集，並可使用增加的一些外圍功能部件。

二、        特性

·EMC78451指令、時序級完全兼容

·指令擴展爲16位寬

·增加了1條指令MOVC（將PAH、PAL所指的ROM內容讀至ACC）(EXT Mode)

·內含4K*16 OTP ROM

.工作電壓 2.2V ~ 5.5V

三、        引腳分配

1.    VDD5            : Power pad

2.    VDD              : Input power > 3.6V     : connect 0.1uF capacitor to GND

                             Input power < 3.6V     : connect to VDD5

3.    GND              : ground pad

4.    OSCI / P70     : The pin function is determined by code-option

                             When Xtal mode, oscillator in pad,

                             When external RC mode, connect a resistor to VDD,

                             Otherwise, as general input pin.

5.    OSCO / P71   : The pin function is determined by code-option

                             When Xtal mode, oscillator out pad,

                             When RC mode, output internal system clock,                                                           Otherwise, as general input pin.

6.    EPOR_N        : Reset, low active, smit-trigger input with pull-up

7.    EINT / P60     : The pin function is determined by code-option

                             1). EINT: interrupt pin

                             2). P60: bidirectional open-drain I/O pin with controllable       pull-up.

8.    P50                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 1mA

9.    P51                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 1mA

10. P52                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 1mA

11.   P53                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 1mA

12.   P54                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 1mA

13.   P55                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 1mA

14.   P56                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 1mA

15.   P57                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 1mA

16.   P61                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 8mA

17.   P62                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 8mA

18.   P63                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 8mA

19.   P64                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 8mA

20.   P65                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 8mA

21.   P66                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 8mA

22.   P67                : Bidirectional I/O with controllable pull-up. Sink 10mA/source 8mA

23.   P72                : Bidirectional I/O pin. Sink 10mA/source 8mA

24.   P73                : Bidirectional I/O pin. Sink 10mA/source 8mA

25.   P74                : Bidirectional I/O pin. Sink 10mA/source 8mA