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參數(shù)資料
| 型號(hào)： | NT6881 |
| 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)： | 1/23頁 |
| 文件大小： | 785K |
| 代理商： | NT6881 |
NT6881
USB Keyboard Micro-Controller
1
V2.6
Features
n
Built-in
6502
8-bit CPU
n
3 MHz CPU operation frequency when oscillator is
running at 6 MHz
n
6K bytes of 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 Endpoints provided
n
Remote Wakeup provided
n
CMOS technology for low power consumption
n
40-pin DIP package, 42-pad Chip Form and COB
General Description
The NT6881 is a single chip micro-controller for USB
keyboard applications. It incorporates a 6502 8-bit CPU
core, 6K bytes of mask 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
VCP
VDP
VDM
P30
P31
INT0/P32
INT1/P33
P34
P11
P00
P01
P02
P03
P04
P05
P06
P07
P10
P17
P16
P15
P14
P13
P20
P21
P22
P23
P25
P24
P26
LED0
P27
LED1
V
DD
LED2
OSCO
OSCI
P12
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
RESET
Pad Configuration
26
25
18
17
16
15
14
4
3
2
1
42
41
40
39
P
1
0
P
1
1
P
1
2
P
1
3
P
1
4
P
0
6
P
0
5
P
0
4
P20
P21
P22
P23
P24
P25
P26
P27
LED0
LED1
LED2
VDM
P30
P31
P32
P33
P34
RESET
P00
P01
P02
V
D
P
V
C
P
G
N
D
G
N
D
O
S
C
I
O
S
C
O
V
C
C
V
C
C
P
0
7
13
12
11
10
9
8
7
5
35
36
37
38
31
32
33
34
27
28
29
30
24
23
22
21
20
19
P03
6
P
1
5
P
1
6
P17
NT6881H
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