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TC665 Datenblatt(PDF) 18 Page - Microchip Technology

Teilenummer TC665
Bauteilbeschribung  SMBus??PWM Fan Speed Controllers With Fan Fault Detection
PDF  36 Pages
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Hersteller  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC665 Datenblatt(HTML) 18 Page - Microchip Technology

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TC664/TC665
DS21737A-page 18
 2002 Microchip Technology Inc.
6.2
FAN_FAULT Threshold Register
(FAN_FAULT)
The FAN_FAULT Threshold Register is used to set the
fan fault threshold level for the fan. The Fan Fault
Threshold Register is an 8-bit read/writable register
that allows the fan fault RPM threshold to be set in 50
RPM increments. The default setting for the Fan Fault
Register is 500 RPM (0000 1010). The maximum set
point value is 12750 RPM.
If the measured fan RPM (stored in the RPM Register)
drops below the value that is set in the Fan Fault Reg-
ister for more than 2.4 sec, FF (bit 0<0>) in the Status
Register will be set to a '1' and the FAULT output will be
pulled low.
See Register 6-2 for the Fan Fault
Threshold Register 8-bit format.
REGISTER 6-2:
FAN FAULT THRESHOLD REGISTER (FAN_FAULT)
D(7)
D(6)
D(5)
D(4)
D(3)
D(2)
D(1)
D(0)
RPM
000
000
000
000
000
00
50
000
000
10
100
.
...
...
.
.
...
...
.
111
111
10
12700
111
111
11
12750



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