EMC6D103-CZC SMSC, EMC6D103-CZC Datasheet - Page 35

• Manufacturer Part Number: EMC6D103-CZC
• Description: Industrial Temperature Sensors Auto Fan Contrllr Up to 4 Fans
• Manufacturer: SMSC

Specifications of EMC6D103-CZC

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Datasheet
SMSC EMC6D103
Override all PWM
duty cycle except
outputs to 100%
if disabled or in
manual mode
Time Elapsed?
Spin Up
(5C-5E)
*See
When in Auto Fan Control Operating Mode the hardware controls the fans directly based on monitoring
of temperature and speed.
To control the fans:
1. Set the minimum temperature that will turn the fans on. This value is programmed in Registers 67h-
2. Set the hysteresis value for the minimum temperature that will turn the fans off. This value will hold
No
69h: Zone x Low Temp Limit (Auto Fan Mode Only).
the fans on until the temperature goes a certain amount below the value programmed in the Zone
x Low Temp Limit registers. This value will prevent the fan from oscillating between on and off if
the temperature is around the minimum temperature limit. This value is programmed in Registers
6Dh-6Eh: Zone Hysteresis registers.
Set Fan Output to
Begin Fan Spin-Up
Registers 5C-5Eh: PWM Configuration on page 66
100%
Yes
Yes
Yes
End Fan Spin Up
Figure 7.1 Automatic Fan Control Flow Diagram
Yes
Set fan speed based on
Auto Fan Range
Fan Output
Algorithm*
Temp >=
(66~68)
Temp >=
AbsLimit
At 0%?
(69~6B)
Limit
Yes
No
No
End Polling Cycle
No
Fan Spinning
Begin Polling
DATASHEET
Cycle
Up?
No
35
Off/Min set to 1?
Set fan to min
Auto Fan
Initiated
Mode
PWM
(62)
Yes
for details.
No
Set Fan Output to
Fan Output
Hyst Temp
Temp >=
(6C~6D)
At 0%?
0%
Yes
No
Revision 0.3 (03-01-07)
minimum speed.
Set fan output to
auto fan mode
(63~65)
No
Yes