M3004LD Ver la hoja de datos (PDF) - STMicroelectronics
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M3004LD Datasheet PDF : 10 Pages
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M3004LAB1 - M3004LD
Figure 4 : Single Key - Stroke Sequence.
Debounce time : tDB = 4 to 9 x TO
Start time : tST = 5 to 10 x TO
Minimum release time : tREL = TO
closed
RE V
released
key bouncing
scan
DRVnN off
on
t DB
H
REMO
L
tW
t ST
scan
t REL
new key
scan
new word
H
OSCO
L
OSCILLATOR ACTIVE
Figure 5 : Multiple Key-Stroke Sequence.
Scan rate multiple key-stroke : tSM = 8 to 10 x TO
closed
KEY A released
key bouncing
key A decoded as HIGH
key A decoded as LOW
KEY B closed
released
DRVnN off
on
t DB
REMO H
L
t ST
H
OSCO
L
scan
scan
tW
word key A
word key A
scan
t SH
OSCILLATOR ACTIVE
t DB
t ST
word key B
8/10
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