CF5762AB0 datasheet(5/10 Pages) NPC

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CF5762AB0

NIPPON PRECISION CIRCUITS INC.—5

FUNCTIONAL DESCRIPTION

Motor Output

Sweep movement frequency: 8Hz

The pulse cycle (Tcy) and the pulsewidth (Tpw) correspond to 1/16 Sec (= 62.5ms).

Reset

All functions are reset when RESET goes HIGH.

The reset is released when RESET goes LOW or

open circuit (RESET has a built-in pull-down resis-

tor).

Clock movement reset

For step clock movement, the seconds are stopped.

When reset is released, the next pulse is output on

the opposing output pin to that immediately before

the reset was applied. The time delay until the pulse

output after reset is released is 1

seconds.

For sweep clock movement, both outputs O1 and O2

are held HIGH during reset.

Melody reset

If a reset occurs during melody or chime output, the

output stops immediately. During reset, the MT is

valid when it is input. When the MT pin is HIGH, the

reset signal is valid if input.

Time reset

During the timing between reset and the hourly sig-

nal input when the melody select pins (SEL1, SEL2)

are used to monitor, chime monitoring is inactive

while melody monitoring is active.

Figure 1. Motor pulse output

VSS

Tcy

Tpw

VDD

VSS

VDD

Tpw

Tcy

0.0625

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