SC2128C-C82D Просмотр технического описания (PDF) - Silan Microelectronics

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SC2128C-C82D

REMOTE FAN CONTROL IC

Silan Microelectronics 

Silan

Semiconductors

SC2128C

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.

Strong rhythm wind

Middle rhythm wind

Low rhythm wind

hours

t=0

Strong rhythm wind

Middle rhythm wind

Low rhythm wind

t=0.5hr t=1.0hr

timer timeout

Strong rhythm sleep mode wind pattern

hours

t=0

Strong rhythm wind

Middle rhythm wind

Low rhythm wind

t=0.5hr t=1.0hr

timer timeout

Middle rhythm sleep mode wind pattern

hours

t=0 t=0.5hr t=1.0hr

timer timeout

Low rhythm sleep mode wind pattern

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.

VDD

SC2128C

OFF/BUZZ

VSS

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 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

compatible with SC2268. Some description follows.

Please refer to specification of SC2268 for details.

Code bit:

"0" bit:

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

"1" bit:

0.625ms

1.875ms

2.5ms

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

Start/Code word:

b0 b1 b2 b3 b4 b5 b6 b7

consecutive and matched code words. It then

actuates the command according to the code words

table shown later.

Code frame

start word 1st code word 2nd code word

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.1

2001.09.26

9

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