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EM78P447SBWM 参数 Datasheet PDF下载

EM78P447SBWM图片预览
型号: EM78P447SBWM
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-BIT MICRO-CONTROLLER]
分类和应用: 微控制器外围集成电路光电二极管可编程只读存储器
文件页数/大小: 55 页 / 1601 K
品牌: ELAN [ ELAN MICROELECTRONICS CORP ]
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EM78P447S  
OTP ROM  
Table 2 EM78P447SAS Pin Description  
Symbol Pin No.  
Type  
-
Function  
VDD  
3
* Power supply.  
* XTAL type: Crystal input terminal or external clock input pin.  
* RC type: RC oscillator input pin.  
* XTAL type: Output terminal for crystal oscillator or external clock input pin.  
* RC type: Instruction clock output.  
OSCI  
27  
I
I/O  
I
OSCO  
26  
* External clock signal input.  
* The real time clock/counter (with Schmitt trigger input pin) must be tied to  
VDD or VSS if not in use.  
TCC  
2
* Input pin with Schmitt trigger. If this pin remains at logic low, the controller  
will also remain in reset condition.  
/RESET  
28  
I
P50~P53 5~8  
I/O  
I/O  
* P50~P53 are bi-directional I/O pins.  
9~13,  
* P60~P67 are bi-directional I/O pins. These can be pulled -high internally  
by software control.  
P60~P67  
15~17  
* P70~P77 are bi-directional I/O pins.  
* P74~P75 can be pulled -high internally by software control.  
* P76~P77 can have open-drain output by software control.  
* P70 and P71 can also be defined as the R-option pins.  
* External interrupt pin triggered by falling edge.  
* Ground.  
P70~P77 18~25  
I/O  
/INT  
VSS  
4
1,14  
I
-
Table 3 EM78P447SBP and EM78P447SBWM Pin Description  
Symbol Pin No.  
Type  
-
Function  
VDD  
4
* Power supply.  
* XTAL type: Crystal input terminal or external clock input pin.  
* RC type: RC oscillator input pin.  
OSCI  
29  
I
* XTAL type: Output terminal for crystal oscillator or external clock input  
pin.  
OSCO  
28  
I/O  
* RC type: Instruction clock output.  
* External clock signal input.  
* The real time clock/counter (with Schmitt trigger input pin), must be tied  
to VDD or VSS if not in use.  
* Input pin with Schmitt trigger. If this pin remains at logic low, the controller  
will keep in reset condition.  
TCC  
3
I
/RESET  
P50~P57  
30  
I
8~11,2~1,  
32~31  
I/O  
I/O  
* P50~P57 are bi-directional I/O pins.  
* P60~P67 are bi-directional I/O pins. These can be pulled -high internally  
by software control.  
* P70~P77 are bi-directional I/O pins.  
P60~P67 12~19  
* P74~P75 can be pulled-high internally by software control.  
* P76~P77 can have open-drain output by software control.  
* P70 and P71 can also be defined as the R-option pins.  
* External interrupt pin triggered by falling edge.  
* Ground.  
P70~P77 20~27  
I/O  
/INT  
VSS  
NC  
7
6
5
I
-
-
* No connection.  
This specification is subject to change without prior notice.  
7
06.25.2003 (V1.1)  
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