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SC2128A-L23S 参数 Datasheet PDF下载

SC2128A-L23S图片预览
型号: SC2128A-L23S
PDF下载: 下载PDF文件 查看货源
内容描述: 遥控风扇控制IC [REMOTE FAN CONTROL IC]
分类和应用: 风扇遥控
文件页数/大小: 15 页 / 220 K
品牌: SILAN [ SILAN MICROELECTRONICS JOINT-STOCK ]
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Silan  
Semiconductorsꢀ  
SC2128A  
the final adjustments, regardless the adjustments are made from panel key or from remote control handset. One  
exception is the SLEEP key available on the remote control handset. SLEEP key start or adjusts the fan to the  
default sleep settings. Regardless the fan is started by SPEED or by MEMS, SLEEP key does not affect the  
operation memory.  
14. BUZZER OUTPUT  
All valid key pressed except OFF/MEMS initiates a 150ms  
duration 4kHz 50% duty cycle pulse train at OFF/MEMS/BUZZ  
pin. OFF/MEMS key function as OFF key if pressed when fan is  
in any on state. In this case, it does NOT initiate an output on  
BUZZ. OFF/MEMS key functions as MEMORY-START key if  
pressed when fan is in off state. In this case, it DOES initiate a  
150ms duration 4kHz 50% duty cycle pulse train on BUZZ. Note  
that when OFF/ MEMS/BUZZ outputs the pulse train, key input  
is suppressed. That is, pressing OFF/MEMS key when the  
buzzer is buzzing is NOT recognized by SC2128A. The  
diagram right shows the buzzer connection.  
V
DD  
SC2128A  
OFF/MEMS key  
OFF/MEMS/  
BUZZ  
V
SS  
-5V  
15. REMOTE CONTROL DECODER  
SC2128A is designed to be used together with SC2268 infrared ray remote control encoder. Such combination  
allows up to 8 remote control keys – SPEED, MODE, TIMER, LIGHT, SLEEP, SW1, SW2, OFF/MEMS – to be  
built on the remote control handset. 4 bits customer code, b3 ~ b6, is encoded by SC2268 and decoded by  
SC2128A in order to avoid remote control contention between devices. With SC2268, b3 is determined by  
bonding option; b4, b5 and b6 are determined by connecting respective c4, c5, c6 pin to VDD or VSS. With  
SC2128A, b3 and b6 can be mask programmed upon customer request and with NRE.  
The remote control signal coding scheme is fully  
Code bit:  
compatible with SC2268. Some description follows.  
"0" bit:  
Please refer to specification of SC2268 for details.  
When SC2128A receives a remote control signal at  
"1" bit:  
0.625ms  
its REMOTE pin, it decodes the received waveform  
1.875ms  
2.5ms  
into consecutive “0” bits and “1” bits. It first  
compares the received start word against its  
customer code. If and only if the start word matches  
Start/Code word:  
Code frame  
b0  
b1  
b2  
b3  
b4  
b5  
b6  
b7  
the customer code, it then compares for two  
consecutive and matched code words. It then  
actuates the command according to the code words  
table shown later.  
start word 1st code word 2nd code word  
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD  
Rev: 1.0  
2000.12.31  
11  
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