NT6881 データシートの表示（PDF） - Novatek Microelectronics

部品番号

コンポーネント説明

一致するリスト

NT6881

USB Keyboard Micro-Controller

Novatek Microelectronics 

NT68P81

USB Keyboard Micro-Controller

Features

n Built-in 6502C 8 -bit CPU

n 3 MHz CPU operation frequency when oscillator is

running at 6 MHz

n 6K bytes of OTP (one time programming) ROM

n 256 bytes of SRAM

n One 8-bit programmable base timer with pre-divider

circuit

n 29 programmable bi-directional I/O pins including two

external interrupts

n 3 LED direct sink pins with internal serial resistors

n On-chip oscillator (Crystal or Ceramic Resonator)

n Watch-dog timer reset

n Built-in power-on reset

n USB interface

n 3 supported endpoints

n Remote wakeup provided

n CMOS technology for low power consumption

n 40-pin DIP package, 42-pad Dice form and COB

General Description

The NT68P81 is a single chip micro-controller for USB

keyboard applications. It incorporates a 6502C 8-bit

CPU core, 6K bytes of OTP ROM, and 256 bytes of RAM

used as working RAM and stack area. It also includes 29

programmable bi-directional I/O pins with built-in

resistors, and one 8-bit pre-loadable base timer.

Additionally, it includes a built-in power-on reset, a built-

in low voltage reset, an oscillator that requires crystal or

ceramic resonator applied, and a watch-dog timer that

prevents system standstill.

Pin Configuration

GND 1

VCP 2

VDP 3

VDM 4

[OE] P30 5

[PGM] P31 6

INT0/P32 7

INT1/P33 8

P34 9

[VPP] RESET 10

[A0] P00 11

[A1] P01 12

[A2] P02 13

[A3] P03 14

[A4] P04 15

[A5] P05 16

[A6] P06 17

[A7] P07 18

[A8] P10 19

[A9] P11 20

40 OSCI

39 OSCO

38

VD D

37 LED2 [MODE2]

36 LED1 [MODE1]

35 LED0 [MODE0]

34 P27 [DB7]

33 P26 [DB6]

32 P25 [DB5]

31 P24 [DB4]

30 P23 [DB3]

29 P22 [DB2]

28 P21 [DB1]

27 P20 [DB0]

26 P17

25 P16

24 P15 [CE]

23 P14 [A12]

22 P13 [A11]

21 P12 [A10]

Pad Configuration

PPP P

111 1

543 2

25 24 23 22

P P P PP

1 1 0 00

1 0 7 65

21 20 1 9 18 17

P16

P17

P20

P21

P22

P23

P24

P25

P26

P27

LED0

LED1

16

286

15

27

14

28

13

29

12

30

NT68P81

11

31

10

32

9

33

8

34

7

35

6

36

37

3 9 40

38

41 42

1

2

45

3

P04

P03

P02

P01

P00

RESET

P34

P33

P32

P31

P30

L VV

E CC

D CC

2

O O GG V V V

S S NN C D D

C C DD P P M

OI

1

V2.0

Share Link: