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參數(shù)資料
| 型號： | NT68P81-D01012 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | USB Keyboard Micro-Controller |
| 中文描述： | USB鍵盤微控制器 |
| 文件頁數(shù)： | 1/30頁 |
| 文件大?。?/td> | 1003K |
| 代理商： | NT68P81-D01012 |
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NT68P81
USB Keyboard Micro-Controller
1
V2.0
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
Pad Configuration
GND
VCP
VDP
VDM
[OE] P30
[PGM] P31
INT0/P32
INT1/P33
P34
[A9] P11
[A0] P00
[A1] P01
[A2] P02
[A3] P03
[A4] P04
[A5] P05
[A6] P06
[A7] P07
[A8] P10
P17
P16
P15 [CE]
P14 [A12]
P13 [A11]
P20 [DB0]
P21 [DB1]
P22 [DB2]
P23 [DB3]
P25 [DB5]
P24 [DB4]
P26 [DB6]
LED0 [MODE0]
P27 [DB7]
LED1 [MODE1]
V
DD
LED2 [MODE2]
OSCO
OSCI
P12 [A10]
N
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
25
24
23
22
21
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
[VPP] RESET
28
34
NT68P81
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
41
40
39
38
37
36
35
33
32
31
30
29
24
23
22
21
20
19
18
17
G
N
D
V
C
P
V
D
P
V
D
M
O
S
C
O
V
C
C
L
E
D
2
P31
P32
P33
P34
RESET
P00
P01
P02
P03
P04
P
0
5
P20
P21
P22
P23
P24
P25
P26
P27
LED0
LED1
P
1
5
P
1
4
P
1
3
P
1
2
P
1
1
P
1
0
P
0
7
P
0
6
42
O
S
C
I
G
N
D
1
V
C
C
P30
25
28
26
27
P16
P17
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