Environmental Monitoring and Control Device
Datasheet
Table 8.10 - Spike Smoothing
SPIKE SMOOTHED OVER (SEC)
ZNX-[2:0]
000
001
010
011
100
101
110
111
35
17.6
11.8
7.0
4.4
3.0
1.6
0.8
Table 8.11 - PWM Output Below Limit Depending On Value Of Off/Min
OFF/MIN PWM ACTION
At 0% duty below LIMIT
0
1
At Min PWM Duty below LIMIT
8.21 Registers 64-66h: Minimum PWM Duty Cycle
BIT 7
(MSB)
BIT 0
(LSB)
REGISTER
ADDRESS
READ/
WRITE
REGISTER
NAME
DEFAULT
VALUE
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Fan1 PWM
64h
65h
66h
R/W
R/W
R/W
7
7
7
6
6
6
5
5
5
4
4
4
3
3
3
2
2
2
1
1
1
0
0
0
80h
80h
80h
Minimum
Fan2 PWM
Minimum
Fan3 PWM
Minimum
These registers become read only when the Lock bit is set. Any further attempts to write to these registers
shall have no effect.
These registers specify the minimum duty cycle that the PWM will output when the measured temperature
reaches the Temperature LIMIT register setting.
Table 8.12 - PWM Duty vs. Register Setting
MINIMUM PWM
DUTY
0%
VALUE
VALUE (HEX)
00h
(DECIMAL)
0
25%
50%
100%
64
40h
80h
FFh
128
255
SMSC EMC6D100/EMC6D101
Page 56
Rev. 09-09-04
DATASHEET
SMSC [ SMSC CORPORATION ]
