EMC6D102_06 SMSC [SMSC Corporation], EMC6D102_06 Datasheet - Page 80
EMC6D102_06
Manufacturer Part Number
EMC6D102_06
Description
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.EMC6D102_06.pdf
(86 pages)
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Chapter 9 Timing Diagrams
Revision 0.4 (06-15-06)
9.1
9.2
SCLK
SDAT
NAME
t1
t2
P
t
The following section shows the timing for the PWM[1:3] outputs.
Note 9.2
Note 9.3
PWM Outputs
SMBus Interface
BUF
FANx
PWM Period
PWM High Time
S
t
LOW
This value is programmable by the PWM frequency bits located in the FRFx registers.
The PWM High Time is based on a percentage of the total PWM period (min=0/256*T
max =255/256*T
(T
t
HD:STA
PWM
(Note
DESCRIPTION
(Note
t
= t1).
R
9.2)
Table 9.1 Timing for PWM[1:3] Outputs
9.3)
Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Figure 9.1 PWMx Output Timing
t2
t
t
HIGH
HD:DAT
PWM
Figure 9.4 SMBus Timing
). During Spin-up the PWM High Time can reach a 100% or Full On.
t
SU:DAT
DATASHEET
t1
t
F
80
MIN
11.4
S
0
t
SU:STA
t
HD:STA
TYP
MAX
90.9
99.6
t
SU:STO
SMSC EMC6D102
UNITS
Datasheet
msec
%
P
PWM
,
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