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參數(shù)資料
| 型號(hào)： | HT6240-002 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | RES THICK FILM 100 OHM 1 W 7KV |
| 中文描述： | 紅外遙控編碼器 |
| 文件頁(yè)數(shù)： | 6/14頁(yè) |
| 文件大?。?/td> | 146K |
| 代理商： | HT6240-002 |
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HT6240-002
6
December 16, 1999
Functional Description
Key operation
The input pins (IE0~IE3) and the output pins
(OF0~OF7) constitute a max. of 4 8 key matrix
which is also called standard key. The extended
key is formed by input pin DATA and the scan
output (OF5~OF7). The 4 8 key matrix and the
extended key can transmit a max. of 256 in-
struction.
CT maintains L and no transmission code is
generated when two or more keys in standard
key are pressed.
Table 1 shows the relationship between the key
matrix and the transmission code.
Table 1
Transmission Code
Key Input
D1
D0
IE0
0
0
IE1
0
1
IE2
1
0
IE3
1
1
Transmission Code
Scan Output
D4
D3
D2
OF0
0
0
0
OF1
0
0
1
OF2
0
1
0
OF3
0
1
1
OF4
1
0
0
OF5
1
0
1
OF6
1
1
0
OF7
1
1
1
Transmission Code
DATA Input
D7
D6
D5
OF5
1
OF6
1
OF7
1
Custom code
The custom code is made up of input pin DATA
and scan output OF0~OF4. It has 8 bits
(C0~C7); the lower 3 bits of the custom code
(C5, C6 and C7) are fixed as 0 .
Fig.1showsanexampleofcustomcodeselection.
Extended bit
The extended bit is formed by input pin DATA
and the scan output (OF5~OF7). Fig. 2 shows
an example of extended bit selection.
# #
+ 1
+ 2
+ ,
# # &
:
; 7
; + +
:
1
2
,
:
Fig. 2
# #
+
+
+
+
+ 0
! &
0
1
2
,
Fig. 1
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