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SC2128C-C32S Datasheet(PDF) 9 Page - Silan Microelectronics Joint-stock |
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SC2128C-C32S Datasheet(HTML) 9 Page - Silan Microelectronics Joint-stock |
9 / 13 page Silan Semiconductors SC2128C HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 1.1 2001.09.26 9 11. RHYTHM SLEEP WIND MODE Pressing MODE key in sleep wind mode brings SC2128C into rhythm sleep wind. In rhythm sleep wind mode, SC2128C outputs LOW, MIDDLE or STRONG rhythm wind pattern and automatically steps down one level every 30 minutes until it reaches low rhythm wind level. If no off-timer is set, SC2128C keeps in low rhythm wind output. Otherwise it restores off state when the off-timer times out. t=0 t=0.5hr t=1.0hr timer timeout hours Middle rhythm sleep mode wind pattern Strong rhythm wind t=0 t=0.5hr t=1.0hr timer timeout hours Strong rhythm sleep mode wind pattern t=0 t=0.5hr t=1.0hr timer timeout hours Low rhythm sleep mode wind pattern Middle rhythm wind Low rhythm wind Strong rhythm wind Middle rhythm wind Low rhythm wind Strong rhythm wind Middle rhythm wind Low rhythm wind 12. BUZZER OUTPUT All valid key pressed except OFF/BUZZ initiates a 150ms duration 4kHz 50% duty cycle pulse train at OFF/BUZZ pin. OFF/BUZZ 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. Note that when OFF/BUZZ outputs the pulse train, key input is suppressed. That is, pressing OFF/BUZZ key when the buzzer is buzzing is NOT recognized by SC2128C. The diagram right shows the buzzer connection. SC2128C VSS VDD OFF/BUZZ OFF/BUZZ key -5V 13. REMOTE CONTROL DECODER SC2128C 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/BUZZ – to be built on the remote control handset. 4 bits customer code, b3 ~ b6, is encoded by SC2268 and decoded by SC2128C 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 V DD 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 compatible with SC2268. Some description follows. Please refer to specification of SC2268 for details. When SC2128C receives a remote control signal at its REMOTE pin, it decodes the received waveform 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 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 Code frame b0 b1 b2 b3 b4 b5 b6 b7 Start/Code word: Code bit: "1" bit: 0.625ms 1.875ms 2.5ms "0" bit: |
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