LM8562 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LM8562

Digital Alarm Clock

SANYO -> Panasonic 

LM8562

5. Alarm

The LM8562 contains two alarms on a 24-hour basis.

Alarm 1 ..... Superposition of 600 Hz and 1 Hz

Alarm 2 ..... Superposition of 1200 Hz and 1 Hz

6-minutes snooze

The alarm output duration time is 59 minutes. The 59-minute duration counter is common to the alarm 1, alarm2, and sleep

timer.

6. Time Setting, Dimmer

The 3 level input RT-TIME SET/DIMMER INPUT pin provides the following functions.

RT-TIME SET/DIMMER INPUT Pin Input

VDD

OPEN

VSS

Functions

.Time setting enable, normal display

Time, alarm time, sleep timer duration time setting enable

.Time setting inhibit, normal display

Time setting enable (except power-down mode)

.Time setting inhibit, dimmer display

Display brightness 50 Hz mode: 1/24 duty

60 Hz mode: 1/20 duty

The 3-level input TIME-SET INPUT pin provides the following operations.

TIME-SET INPUT Pin Input

AC (50/60 Hz or more)

VDD

DC (20 ms min.)

OPEN

AC (50/60 Hz or more)

VSS

DC (20 ms min.)

Fast-up

Slow-up

No operation

Fast-down

Slow-down

Operations

Setting Contents

1 Fast-up/down

2 Slow-up/down

50/60 Hz rate

Immediately incremented/decremented ±1 and counted up/down at a 2 Hz rate 0.5 to 1.0 second later

7. ON/OFF INPUT Pin

The 3-level input ON/OFF INPUT pin acts on the ALM-1, 2 RADIO OUTPUT pins as shown below.

Output Pin

ALM-1 OUTPUT

ON-State Condition

Alarm 1 setting time = Current time

ALM-2 OUTPUT Alarm 2 setting time = Current time

RADIO OUTPUT ON/OFF INPUT = VSS

(ON-state indicator : ON state)

Sleep-in

(Sleep indicator : ON state)

Pause

Conditions

Snooze-in

Snooze-in

—

—

OFF-State Conditions

. ON/OFF INPUT = VSS

. ON/OFF INPUT = VDD

. Sleep-in

. 59 minutes after the alarm 1 is turned ON

. ALM-1 OUTPUT = VDD

. ON/OFF INPUT = VSS

. ON/OFF INPUT = VDD

. Sleep-in

. 59 minutes after the alarm 2 is turned ON

. ALM-2 OUTPUT = VDD

. ON/OFF INPUT = VDD

. Power-down mode

. Sleep-in

(On-state indicator : OFF state)

. ON/OFF INPUT = VSS

. ON/OFF INPUT = VDD

. Power-down mode

(Sleep indicator : OFF state)

8. Sleep, Snooze Timer

The 3-level input SLEEP/SNOOZE INPUT pin operates as shown below.

SLEEP/SNOOZE INPUT Pin Input

VDD (20 ms min.)

OPEN

VSS (20 ms min.)

Operation

Snooze-in & seconds display mode

. The alarm stops functioning for 6 to 7 minutes.

. Seconds display

No operation

Sleep mode

. The sleep counter is set to operate for 59 minutes.

. Counted down automatically at a 2 Hz rate 1.5 to 2.0 seconds later

. Fast/slow, up/down time setting available

No.2658-5/7

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