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參數(shù)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(shù)： | 2/13頁 |
| 文件大?。?/td> | 289K |
| 代理商： | NT6880H |
NT6880
2
Block Diagram
Watch Dog
Timer
6502
CPU
5K Bytes
ROM
160 Bytes
SRAM + STACK
Base Timer
Interrupt
Controller
Timing Generator
(RC OSC/Ceramic Resonator: 4MHz)
Power-On RESET/
Low Voltage RESET
I/O PORTs
GND
DATA
CLK
LED0
LED1
LED2
P00 - P07
P10 - P17
P30 - P34
P20 - P27
V
DD
RESET
Pin and Pad Descriptions
Pin No.
1
2
3
Pad No.
1
2
3
Designation
GND
NC
DATA
I/O
P
-
I/O
Description
Ground pin
No connection, recommended to connect V
DD
or floating
I/O, 10K
pull-up resistor for communication
I/O, 10K
pull-up resistor for communication
Bi-directional I/O pins
4
4
CLK
I/O
5 - 9,
11 - 34
10
5 - 9,
11 - 34
10
P30 - P34,
P00 - P27
I/O
RESET
I
RESET
signal input pin with internal pull up resistor; Active low
LED direct sink pins
35 - 37
35 - 37
LED0 -
LED2
V
DD
R/OSCO
O
38
39
38
39
P
I
Power supply
47K
resistor connected for RC OSC or 4MHz ceramic resonator
connected
No connection for RC OSC connected for 4MHz ceramic resonator
40
40
OSCI
-
* Under the constraint of the maximum frequency variation, (
F/F)
max
,
≤
±
1%, code 3, 7 (ceramic resonator option) must
be selected and pin 39 and pin 40 must be connected to a ceramic resonator. If (
F/F)
max
,
≤
±
10%, code 1, 5 (RC OSC
option) it is recommended that pin 39 be connected to a 47K
resistor with
≤
±
1% accuracy to V
DD
. Pin 40 is floating.
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