EM78P156ELKM Ver la hoja de datos (PDF) - ELAN Microelectronics

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Fabricante

EM78P156ELKM

8-BIT MICRO-CONTROLLER

ELAN Microelectronics 

EM78P156EL

OTP ROM

Table 2 EM78P156ELAS Pin Description

Symbol Pin No.

VDD

15

OSCI

17

OSCO

16

TCC

4

/RESET 5

P50~P53

18, 19,

2, 3

P60~P67 7~14

/INT

7

VSS

6

Type

-

I

I/O

I

I

I/O

I/O

I

-

Function

* Power supply.

* XTAL type: Crystal input terminal or external clock input pin.

* ERC 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.

* P50 and P51 can also be defined as the R-option pins.

* P50~P52 can be pulled-down by software.

* P60~P67 are bi-directional I/O pins.

* These can be pulled-high or can be open-drain by software programming.

* P60~P63 can also be pulled-down by software.

* External interrupt pin triggered by falling edge.

* Ground.

Table 3 EM78P156ELKM Pin Description

Symbol Pin No.

VDD

15,16

OSCI

18

OSCO

17

TCC

3

/RESET 4

P50~P53

19, 20,

1, 2

P60~P67 7~14

/INT

7

VSS

5, 6

Type

-

I

I/O

I

I

I/O

I/O

I

-

Function

* Power supply.

* XTAL type: Crystal input terminal or external clock input pin.

* ERC 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.

* P50 and P51 can also be defined as the R-option pins.

* P50~P52 can be pulled-down by software.

* P60~P67 are bi-directional I/O pins.

* These can be pulled-high or can be open-drain by software programming.

* P60~P63 can also be pulled-down by software.

* External interrupt pin triggered by falling edge.

* Ground.

This specification is subject to change without prior notice.

7

07.29.2004 (V1.3)

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