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DF69 Datasheet(PDF) 35 Page - PADAUK Technology.

Part # DF69
Description  DC Fan Controller
PDF  106 Pages
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Manufacturer  PADAUK [PADAUK Technology.]
Direct Link  http://www.padauk.com.tw/
Logo PADAUK - PADAUK Technology.

DF69 Datasheet(HTML) 35 Page - PADAUK Technology.

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DF69
DC Fan Controller
When using the crystal oscillator, user must pay attention to the stable time of oscillator after enabling it,
the stable time of oscillator will depend on frequency ` crystal type ` external capacitor and supply
voltage. Before switching the system to the crystal oscillator, user must make sure the oscillator is
stable; the reference program is shown as below:
void
FPPA0 (void)
{
.ADJUST_IC
DISABLE
// IHRC is not calibrated, WDT is enabled
...
$
EOSCR
Enable, 4Mhz;
// EOSCR = 0b110_00000;
$
T16M
EOSC, /1, BIT13;
// T16 receive 2^14=16384 clocks of
crystal osc.,
// Intrq.T16 =>1, crystal osc. Is stable
WORD
count
=
0;
stt16
count;
Intrq.T16
=
0;
wait1
Intrq.T16;
// count fm 0x0000 to 0x2000,
then setINTRQ.T16
clkmd
=
0xA4;
// switch system clock to EOSC;
...
}
Please notice that the crystal oscillator should be fully turned off before entering the power-down mode,
in order to avoid unexpected wakeup event. If the 32KHz crystal oscillator is used and extremely low
operating current is required, misc.6 can be set to reduce current after crystal oscillator is running
normally.
©Copyright 2018, PADAUK Technology Co. Ltd
Page 35 of 106
PDK-DS-DF69_V003 – Apr. 18, 2018



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