SM3502
S
AM
HOP Microelectronics Corp.
FAN CONTROLLER
I. BUZZER
Any key pressed on panel which will generate a 4KHz 50% duty cycle pulse train on buzzer
output pin.
a. When FAN is from stop mode to start mode (press SPEED key)
Buzzer output will generate a "BI-BI" sound.
a
b
c
b. When FAN is from start mode to stop mode (press OFF key)
Buzzer output will generate a long "BI" sound.
d
c. When FAN is operating (press any key other than OFF key)
Buzzer output will generate a "BI" sound.
e
When a = c = e = 62ms
b = 124ms
d = 250ms
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