SC8560 Ver la hoja de datos (PDF) - Silan Microelectronics

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componentes Descripción

Fabricante

SC8560

DIGITAL ALARM CLOCK

Silan Microelectronics 

Silan

Semiconductors

SC8560

(Continued)

Terminal Description

Operating Description

If the power supply voltage drops and is applied again, all the on-segments flash

Power Failure Detection display and the power failure indication mode is entered. The power failure indication

mode is released by applying VSS to “hour set” or “ minutes set”.

The alarm signal outputs when alarm content marches the time .When not reset

Alarm Operation and Alarm

Output

by either snooze input or alarm off input, output continues after l hour and 59

minutes. This output signal consists of 900 Hz 2 Hz intermittent (50% duty)

modulation signals. When the need arises, a filter can be applied to alter the alarm

signal to a DC signal.

When the alarm is sounding and instantly activating Vss to this pin, alarm output is

set to OFF for a period between 8 and 9 minutes after which time the alarm signal

Snooze Input

is once again output .The snooze function can be used repeatedly in l hour and 59

minutes intervals. A pull-down resist is built-in. Activating Vss to the snooze pin

when the alarm is OFF resets the sleep timer counter to [0:00].(This is known as

the one-touch sleep timer reset function.)

Alarm Off Input

Activating this input pin to Vss instantly sets alarm output to OFF. A pull-down

resistor is built-in.

Sleep output can turn on the radio and can be set for time intervals of 59 minutes

or l hour and 59 minutes. Refer to Table 2 for the proper selection procedure (59

minutes or l hour and 59 minute selection). This sleep timer is constructed using a

Sleep Timer and Sleep Output:

down counter and when the counter content arrives at [00], output is set to off and

the radio turns off .Adding Vss to snooze input turns sleep output off, when sleep

output is on.

TABLE 1: DISPLAY MODES

Selective

Input

Display Mode

Digit No.1

Digit No.2

Digit No.3

Digit No.4

Alarm Sleep

NC

NC

Time display

10’s place for

hour ,AM/PM

Hour

10’s place for

minute

Minute

Vss

NC

Alarm display

10’s place for

hour ,AM/PM

Hour

10’s place for

minute

Minute

NC

Vss

Sleep display

Vss

Vss

Second display

Clear

Clear

Hour

Minute

10’s place for

minute

10’s place for

second

Minute

Second

Note: Activating Vss using two inputs simultaneously (alarm select and sleep select), the display mode is switched

to display seconds.

HANGZHOU SILAN MICROELECTRONICS CO.,LTD.

Rev: 1.1 2003.06.26

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