sc2128a-c30s Silan, sc2128a-c30s Datasheet - Page 9

• Manufacturer Part Number: sc2128a-c30s
• Description: Fan Remote Control Decoder Used Together With Sc2268
• Manufacturer: Silan

14. BUZZER OUTPUT
15. REMOTE CONTROL DECODER
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
http:
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.
from remote control handset do not affect the operation memory. If, however, the fan is turned on by MEMS,
the subsequent adjustments to speed, mode, off-timer, SO1, SO2 and LIT output will update the operation
memory to 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.
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
V
refer to specification of SC2268 for details. When SC2128A 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.
If the fan is turned on by SPEED key, subsequent adjustments to the fan operation either from pannel key or
SS
All valid key pressed except OFF/MEMS initiates a 150ms
(5) LIGHT
(1) SPEED
(2) MODE
(3) OFF-TIMER:
(4) SWING HEAD
SC2128A is designed to be used together with SC2268 infrared ray remote control encoder. Such
The remote control signal coding scheme is fully compatible with SC2268. Some description follows. Please
www.silan.com.cn
. With SC2128A, b3 and b6 can be mask programmed upon customer request and with NRE.
low, middle or strong,
ordinary, rhythm, sleep or rhythm sleep.
LIT output status.
off-timer setting,
SO1 and SO2 output state,
SC2128A
OFF/MEMS/
BUZZ
V
V
DD
SS
REV:1.0
-5V
SC2128A
OFF/MEMS key
Page 9 of 13
2004.08.03