Silan

Semiconductors

SC2128C

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.1

2001.09.26

6

5. SW1 KEY

SW1 controls the output status of SO1 and SO2 outputs

which in turn control the head swing of fan. Each

pressing of SW1 key toggles SO1 and SO2 outputs as

shown in the diagram right.

SO1=Z

SO2=Z

SO1=L

SO2=Z

SO1=Z

SO2=L

SO1=L

SO2=L

SW

1 K

EY

SW

1 KE

Y

SW

1 K

EY

SW

1 KE

Y

Fan already ON

Z=high impedence

L=low voltage

6. LIGHT KEY

LIGHT key toggles LIT output on(L) and off(Z). LIT output can only be controlled with LIGHT key (from both panel

and remote control) and SLEEP key (if available) on remote control handset. OFF key does NOT affect LIT

output. LIT output is NOT affected by OFF key as well as off-timer times out.

7. OFF/BUZZ KEY

OFF/BUZZ key functions differently depending on whether the fan is ON or OFF. It functions as OFF key when

the fan is ON, and is used to bring SC2128C from any on state into off state. LIT output is NOT affected by OFF

key.

8. INDICATOR LEDS

Up to twelve(13) indicator LEDs may be constructed on the control panel of fan built with SC2128C. Six(6) LED

sare constructed as 3x2 LED matrix formed by COM and LED1, LED2, LED3. The other six(6) LEDs are built in

series with TRIAC outputs and the thirteenth LED is used as Ordinary Wind mode indicator. The diagrams show

how the LED matrix is constructed.

V

DD

COM

LED3

LED2

LED1

V

SS

-5V

Tb2

Tb3

Tb0

Tb1

Sleep

Rhythm

SC2128C

LO

MI

ST

SO1

SO2

LIT

SC2128C

low

middle

strong

Swing 1

Swing 2

light

LORD

ORD