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參數(shù)資料
| 型號： | EM78P447SAP |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 8-BIT MICRO-CONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 7/55頁 |
| 文件大?。?/td> | 1730K |
| 代理商： | EM78P447SAP |
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EM78P447S
OTP ROM
Table 2 EM78P447SAS Pin Description
Symbol Pin No.
VDD
Type
-
Function
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.
* 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 also remain in reset condition.
* P50~P53 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.
* 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.
OSCI
27
I
OSCO
26
I/O
TCC
2
I
/RESET
28
I
P50~P53
P60~P67 9~13,
5~8
I/O
15~17
I/O
P70~P77 18~25
I/O
/INT
VSS
4
I
-
1,14
Table 3 EM78P447SBP and EM78P447SBWM Pin Description
Symbol
VDD
Pin No.
4
Type
-
Function
* 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.
* 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.
OSCI
29
I
OSCO
28
I/O
TCC
3
I
/RESET
30
I
P50~P57 832~31
I/O
* P50~P57 are bi-directional I/O pins.
P60~P67 12~19
I/O
* 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.
* 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.
* No connection.
P70~P77 20~27
I/O
/INT
VSS
NC
7
6
5
I
-
-
This specification is subject to change without prior notice.
06.25.2003 (V1.1)
7
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