EM78F651N
8-Bit Microcontroller
Table 3 EM78F651NCP, EM78F651NCM
Symbol
P50~P53
P54~P55
P60~P67
P77
OSCI
Pin No.
17, 18, 1
2, 15, 16
6~13
3
16
Type
I/O
I/O
I/O
I
Function
P50~P53 are bidirectional 4-bit input/output pins and can be pulled-
down by software.
Bidirectional 8-bit input/output pins. These can be pulled-high or can
be open drain by software programming. P60~63 can also be pulled
down by software.
P77 is an open drain I/O pin.
Crystal type: Crystal input terminal or external clock input pin
ERC type: RC oscillator input pin
Crystal type: Output terminal for crystal oscillator or external clock
input pin.
RC type: Instruction clock output.
External clock signal input.
Real time clock/counter (with Schmitt Trigger input pin) must be tied to
VDD or VSS if not in use.
External interrupt pin triggered by a falling edge.
Input pin with Schmitt Trigger. If this pin remains at logic low, the
controller will also remain in reset condition.
Power supply
Ground
OSCO
15
I/O
TCC
/INT
/RESET
VDD
VSS
3
6
4
14
5
I
I
I
-
-
Table 4 EM78F651NDKM, EM78F651NDP
Symbol
P50~P57
Pin No.
18, 19, 2,
3, 16, 17,
1, 20
7~14
4
17
Type
I/O
Function
P50~P57 are bidirectional 8-it input/output pins.
P50 and P51 can also be defined as the R-option pins.
P50~P53 can be pulled-down by software.
Bidirectional 8-bit input/output pins. These can be pulled-high or can
be open drain by software programming. P60~63 can also be pulled
down by software.
P77 is an open drain I/O pin.
Crystal type: Crystal input terminal or external clock input pin
ERC type: RC oscillator input pin
Crystal 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.
External interrupt pin triggered by a falling edge.
Input pin with Schmitt Trigger. If this pin remains at logic low, the
controller will also remain in reset condition.
Power supply
Ground
P60~P67
P77
OSCI
I/O
I/O
I
OSCO
16
I/O
TCC
/INT
/RESET
VDD
VSS
4
7
5
15
5
I
I
I
-
-
4
•
Product Specification (V1.1) 10.20.2006
(This specification is subject to change without further notice)
EMC [ ELAN MICROELECTRONICS CORP ]
