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參數資料
| 型號： | NT6880H |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Keyboard Controller |
| 中文描述： | 鍵盤控制器 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 289K |
| 代理商： | NT6880H |
NT6880
Keyboard Controller
1
V1.0
Features
Built-in 6502 8-bit CPU
2 MHz CPU operation frequency
5K bytes of ROM
160 bytes of SRAM
One 8-bit programmable base timer with
1 - 256
μ
sec interval
29 programmable bi-directional I/O pins
3 LED direct sink pins
Mask optional for built-in RC oscillator with an
external resistor or external ceramic resonator applied
Mask optional for DATA/CLK driving capability
Watch-dog timer reset
Built-in power-on reset
Built-in low voltage reset
CMOS technology for low power consumption
Available in 40 pin DIP package and 40 pad Chip
Form
General Description
The NT6880 is a single chip micro-controller for
keyboard applications. It incorporates a 6502 8-bit CPU
core, 5K bytes of ROM and 160 bytes of RAM used as
working RAM and stack area. It also includes 29
programmable bi-directional I/O pins and one 8-bit pre-
loadable base timer. Additionally, it includes a built-in
low voltage reset, a 4MHz RC oscillator requiring an
externally applied resistor or a 4MHz ceramic resonator
and a watch-dog timer that prevents system standstill.
Pin Configuration
GND
NC
DATA
CLK
P30
P31
P32
P33
P34
RESET
P11
P00
P01
P02
P03
P04
P05
P06
P07
P10
P17
P16
P15
P14
P13
P20
P21
P22
P23
P25
P26
LED0
P27
LED1
V
DD
LED2
R/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
P24
Pad Configuration
NT6880H
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
G
N
D
N
C
D
A
T
A
C
L
K
P
3
0
R
/
O
S
C
O
V
D
D
L
E
D
2
P31
P32
P33
P34
RESET
P00
P01
P02
P03
P04
P05
P20
P21
P22
P23
P24
P25
P26
P27
LED0
LED1
P
1
7
P
1
6
P
1
5
P
1
4
P
1
3
P
1
2
P
1
1
P
1
0
P
0
7
P
0
6
1
O
S
C
I
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