Silan

Semiconductors

SC2128C

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.1

2001.09.26

7

* Four LEDs (Tb0, Tb1, Tb2, Tb3) are used to indicate the off-timer period. Depending on the base timer step

option, timer step may be 0.5 hour or 1 hour as indicated in the diagram.

If SC2128C is selected with 4 hour timer

option

If SC2128C is selected with 8 hour timer

option

Tb0=0.5 hour

b1=1 hour

b2=2 hour

b3=4 hour

Tb0=1 hour

b1=2 hour

b2=4 hour

b3=8 hour

The time schedule is the sum of all ON LEDs. For example, if SC2128C is programmed with 1/2/4/8 hour

accumulated timer option, and is Tb0 is ON, Tb1 is OFF, Tb2 is OFF, Tb3 is ON, then the schedule period is 9

hours (1 hr + 9 hr).

* Rhythm LED , Sleep LED and Ordinary LED indicate SC2128C operation modes.

Operation mode

Rhythm LED

Sleep LED

Ordinary LED

ORD (ordinary wind)

OFF

OFF

ON

RTM (rhythm wind)

ON

OFF

OFF

RSL (rhythm sleep wind)

OFF

ON

OFF

* Three LEDs – Low, Middle and Strong – are used to indicate the respective output status of LO, MI, ST output.

LED being ON indicates output active (L). LED being OFF indicates output inactive (Z). Only one output among

LO, MI and HI may be active at a specific time.

* Swing1 LED, Swing2 LED and Light LED indicated respective output status of SO1, SO2, and LIT.

9. TIMER

The external timer of SC2128C may be bonding optioned

into six (6) configurations as shown. Each pressing of

TIMER key will step the internal timer one step up. The

actual sequence depends on the TIMER option selected.

The following diagrams show the timer sequence for each

TIMER option. TIMER automatically counts down as time

passes by. The count down sequence reverses the key

sequence and is also shown in the following diagrams.

: 0.5, 1, 2, 4 hours non-accumulated

: 1, 2, 4, 8 hours non-accumulated

: 0.5, 1, 2, 4 hours accumulated

: 1, 2, 4, 8 hours accumulated

: 1, 2, 4 hours non-accumulated

: 1, 2, 4 hours accumulated