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EM78P447NAM Datasheet(PDF) 7 Page - ELAN Microelectronics Corp

Part No. EM78P447NAM
Description  8-BIT MICRO-CONTROLLER
Download  57 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P447NAM Datasheet(HTML) 7 Page - ELAN Microelectronics Corp

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EM78P447N
OTP ROM
/INT
5
I
* External interrupt pin triggered by falling edge.
VSS
4
-
* Ground.
NC
3
-
* No connection.
Table 2 EM78P447NAS Pin Description
Symbol Pin No.
Type
Function
VDD
3
-
* Power supply.
OSCI
27
I
* XTAL type: Crystal input terminal or external clock input pin.
* RC type: RC oscillator input pin.
OSCO
26
I/O
* XTAL type: Output terminal for crystal oscillator or external clock input pin.
* RC type: Instruction clock output.
* External clock signal input.
TCC
2
I
* The real time clock/counter (with Schmitt trigger input pin) must be tied to
VDD or VSS if not in use.
/RESET
28
I
* Input pin with Schmitt trigger. If this pin remains at logic low, the controller
will also remain in reset condition.
P50~P53
5~8
I/O
* P50~P53 are bi-directional I/O pins.
P60~P67
9~13,
15~17
I/O
* P60~P67 are bi-directional I/O pins. These can be pulled -high internally
by software control.
P70~P77 18~25
I/O
* 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.
/INT
4
I
* External interrupt pin triggered by falling edge.
VSS
1,14
-
* Ground.
Table 3 EM78P447NBP and EM78P447NBWM Pin Description
Symbol
Pin No.
Type
Function
VDD
4
-
* Power supply.
OSCI
29
I
* XTAL type: Crystal input terminal or external clock input pin.
* RC type: RC oscillator input pin.
OSCO
28
I/O
* XTAL type: Output terminal for crystal oscillator or external clock input
pin.
* RC type: Instruction clock output.
* External clock signal input.
TCC
3
I
* The real time clock/counter (with Schmitt trigger input pin), must be tied
to VDD or VSS if not in use.
/RESET
30
I
* Input pin with Schmitt trigger. If this pin remains at logic low, the controller
will keep in reset condition.
P50~P57
8~11,2~1,
32~31
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
20~27
I/O
* 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.
/INT
7
I
* External interrupt pin triggered by falling edge.
VSS
6
-
* Ground.
NC
5
-
* No connection.
This specification is subject to change without prior notice.
10.21.2004 (V1.0)
7


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