LPC47M107S-MS Standard Microsystems (SMSC), LPC47M107S-MS Datasheet - Page 183
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LPC47M107S-MS
Manufacturer Part Number
LPC47M107S-MS
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LPC47M107S-MS.pdf
(188 pages)
Specifications of LPC47M107S-MS
Pin Count
100
Lead Free Status / RoHS Status
Compliant
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Note 1: t
Note 1: The blink rate is programmed through Bits[1:0] in LEDx register. When Bits[1:0]=00, LED is OFF.
NAME
NAME
t1
t2
t3
t1
t2
programmed in the Fan Control register.
Bits[1:0]=01 indicates LED blink at 1Hz rate with a 50% duty cycle (0.5 sec ON, 0.5 sec OFF). Bits[1:0]=10
indicates LED blink at ½ Hz rate with a 25% duty cycle (0.5 sec ON, 1.5 sec OFF). When Bits[1:0]=11, LED
is ON.
TACH
Pulse Time (1/2 Revolution Time=30/RPM)
Pulse High Time
Pulse Low Time
Period
Blink ON Time
LEDx
is the clock used for the tachometer counter. It is 30.52 * DVSR, where the divisor (DVSR) is
FAN_TACHx
DESCRIPTION
DESCRIPTION
FIGURE 36 – FAN TACHOMETER INPUT TIMING
FIGURE 37 – LED OUTPUT TIMING
t2
t1
Page 183
t1
t2
4t
3t
MIN
t
MIN
1
0
TACH
TACH
TACH
t3
1
1
TYP
TYP
MAX
0.5
2
1
MAX
UNITS
sec
sec
UNITS
µsec
µsec
µsec
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