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參數(shù)資料
| 型號(hào)： | NT6868CH |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Insulation Displacement (IDC) Connector; No. of Contacts:20; Contact Termination:IDC; Gender:Male; Contact Plating:Gold RoHS Compliant: Yes |
| 中文描述： | 鍵盤控制器 |
| 文件頁數(shù)： | 2/15頁 |
| 文件大小： | 211K |
| 代理商： | NT6868CH |
NT6868C
2
Block Diagram
WATCH DOG
TIMER
6502
CPU
4K BYTES
ROM
128 BYTES
SRAM + STACK
BASE TIMER
INT. 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.
Pad No.
Designation
I/O
Description
1
1
GND
P
Ground pin
2
2
NC
-
No connection, recommended to connect V
DD
or floating
3
3
DATA
I/O
I/O, 10K
pull-up resistor for communication
4
4
CLK
I/O
I/O, 10K
pull-up resistor for communication
5 - 9,
11 - 34
5 - 9,
11 - 34
P30 - P34,
P00 - P27
I/O
Bi-directional I/O pins
10
10
RESET
I
RESET signal input pin with internal pull-up resistor; Active low
35 - 37
35 - 37
LED0 -
LED2
O
LED direct sink pins
38
38
V
DD
P
Power supply
39
39
R/OSCO
I
47K
resistor connected for RC OSC or 4MHz ceramic resonator
connection
40
40
OSCI
-
No connection for RC OSC connection; for 4MHz ceramic resonator
* Under the constraint of the maximum frequency variation, (
F/F)
max
,
≤
±
1%, code 3, 7 (ceramic resonator option) must
be selected while pins 39 and 40 are connected to a ceramic resonator. If (
F/F)
max
,
≤
±
10%, code 1, 5 (RC OSC option),
then it is recommended to be selected. Also, connect pin 39 a 47K
resistor with,
≤
±
1% accuracy to V
DD
while pin 40 is
floating.
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