Silan

Semiconductors

SC2128A

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

7

4. MODE KEY

MODE key is used to bring SC2128A around ORD

(ordinary wind) mode, RTM(rhythm wind ) mode, SLP

(sleep wind) mode and RSL(rhythm sleep wind ) mode. In

ORD mode, the wind speed is set by SPEED key and does

not change as time passes. In RTM mode the wind speed

cycles through three rhythm wind, patterns as set by the

SPEED key. In SLP and RSL mode, however, the fan

automatically steps down one level (strong to middle,

middle to low) every 30 minutes and keeps in low wind until

off-timer times out. Four modes of operation are described

in details later.

OFF

ORD

RSL

RTM

SLP

SPEED KEY

5. SW1 and SW2 KEYS

SW1 and SW2 keys control the output status of SO1 and

SO2 outputs which in turn control the head swing of fan.

Depending on the 2SW mask option, SO2 is controlled by

either SW1 or SW2 key. If 2SW option is selected each

pressing of SW1 key toggles SO1 ON(L) and OFF(Z) and

each pressing of SW2 key toggles SO1 ON(L) and OFF(Z).

If 2SW option is not selected, pressing SW1 key cycles

SO1 and SO2 output as shown in the diagram and SW2

key has no effect. 2SW option is described later.

SO1=Z

SO2=Z

SO1=L

SO2=Z

SO1=Z

SO2=L

SO1=L

SO2=L

SW

1 K

EY

SW

1 K

EY

SW

1 K

EY

SW

1 K

EY

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/MEMS KEY

OFF/MEMS 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 SC2128A from any on state into off state. LIT output is NOT affected by OFF

key. When fan is OFF, it functions as MEMS (memory start) and is used to turn on the fan and set to the memory

mode, provided memory mode is enabled. Memory mode is explained later in the MEMORY MODE section.

8. INDICATOR LEDS

Up to twelve(12) indicator LEDs may be constructed on the control panel of fan built with SC2128A. Six(6)

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

in series with TRIAC outputs. The diagrams show how the LED matrix is constructed.