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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)： | 6/15頁 |
| 文件大?。?/td> | 211K |
| 代理商： | NT6868CH |
NT6868C
6
I/O Ports
The NT6868C has 31 pins dedicated to input and output. These pins are grouped into 6 ports as follows:
PORT 0 (P00 - P07):
Port 0 is an 8-bit bi-directional CMOS I/O port that is internally pulled HIGH by PMOS. Each pin of port 0 can be bit
programmed as an input or output pin under the software control. When programmed as output, data is latched to the port
data register and output to the pin. Port 0 pins with ''1'' written to them are pulled HIGH by the internal PMOS pull-ups, and
are used as input in that state. These input signals can then be read. The port output will be HIGH after reset.
PORT 1 ( P10 - P17 ) : These functions are the same as PORT 0.
PORT 2 ( P20 - P27) : These functions s are the same as PORT 0.
PORT 3 ( P30 - P34) : These functions are the same as PORT 0.
CLK & DATA
: These two pins have the same structure as I/O ports.
PORT Registers:
Addr.
Bit
7
6
5
4
3
2
1
0
R/W
$00C3
PORT0
PD07
PD06
PD05
PD04
PD03
PD02
PD01
PD00
(RW)
$00C4
PORT1
PD17
PD16
PD15
PD14
PD13
PD12
PD11
PD10
(RW)
$00C5
PORT2
PD27
PD26
PD25
PD24
PD23
PD22
PD21
PD20
(RW)
$00C6
PORT3
-
-
-
PD34
PD33
PD32
PD31
PD30
(RW)
$00C7
CLK
-
-
-
-
-
-
-
CLK
(RW)
$00C8
DATA
-
-
-
-
-
-
-
DATA
(RW)
SD
D
L
Q
Latch
WREN
DB
RST
RDENB
IO
V
DD
Weak PMOS
IO Port Structure
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