EM78P447N
OTP ROM
/INT
VSS
NC
5
4
3
I
-
-
* External interrupt pin triggered by falling edge.
* Ground.
* No connection.
Table 2 EM78P447NAS Pin Description
Symbol Pin No.
VDD
3
OSCI
OSCO
TCC
/RESET
P50~P53
27
26
2
28
Type
-
I
I/O
I
I
I/O
I/O
I/O
I
-
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 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.
5~8
9~13,
P60~P67
15~17
P70~P77 18~25
/INT
VSS
4
1,14
Table 3 EM78P447NBP and EM78P447NBWM Pin Description
Symbol
VDD
OSCI
OSCO
TCC
/RESET
P50~P57
P60~P67
P70~P77
/INT
VSS
NC
Pin No.
4
29
28
3
30
8~11,2~1,
32~31
12~19
20~27
7
6
5
Type
-
I
I/O
I
I
I/O
I/O
I/O
I
-
-
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.
* 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.
* 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.
7
10.21.2004 (V1.0)
This specification is subject to change without prior notice.
EMC [ ELAN MICROELECTRONICS CORP ]
