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PT2272-M2S 参数 Datasheet PDF下载

PT2272-M2S图片预览
型号: PT2272-M2S
PDF下载: 下载PDF文件 查看货源
内容描述: 遥控解码 [Remote Control Decoder]
分类和应用: 遥控
文件页数/大小: 22 页 / 539 K
品牌: PTC [ PRINCETON TECHNOLOGY CORP ]
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Tel: 886-2-66296288  
Fax: 886-2-29174598  
URL: http://www.princeton.com.tw  
Remote Control Decoder  
PT2272  
VALID TRANSMISSION  
When PT2272 receives a transmission code word, it initially checks whether this is a valid transmission.  
For a transmission to be valid, (1) it must be a Complete Code Word, and (2) the Address Bits must  
match the Address Setting at the Address Pins. After two consecutive valid transmissions, PT2272 (1)  
drives the data pins according to the data bits received, and (2) raises VT to high voltage (high state).  
The timings are shown in the following diagram.  
Sync bit  
Sync bit  
1st word 2nd word  
DIN  
t
a
tc  
Data pins  
(momentary)  
t
b
VT  
ta = 8 OSC clock width  
tb = 1 OSC clock width  
tc = 2 code word width  
LATCH OR MOMENTARY DATA OUTPUT TYPE  
PT2272 uses either the latch or the momentary data output type depending on the PT2272 version  
used. The latch type (PT2272-Lx) activates the data out during transmission and this data is sustained  
in the memory until another data is inputted or entered. A momentary type (PT2272-Mx), on the other  
hand, activates the data out only during transmission. In the momentary type, the data does not remain  
in the memory after the transmission is completed. Please refer to the diagram below:  
DATA WORDS  
DATA WORDS  
DIN  
T
T
DATA PINS  
(Momentary)  
DATA OUTPUT X  
DATA OUTPUT Y  
DATA PINS  
(Latch)  
DATA OUTPUT X  
DATA OUTPUT Y  
VT  
T = 2 CODE WORDSWIDTH  
PT2272 V3.7  
- 10 -  
June, 2008