EMC6D102 SMSC Corporation, EMC6D102 Datasheet - Page 19

• Manufacturer Part Number: EMC6D102
• Description: Fan Control Device
• Manufacturer: SMSC Corporation

Fan Control Device with Hardware Monitoring and Acoustic Noise Reduction Features
Datasheet
SMSC EMC6D102
5.3.1
AVG2
01X (default)
0
0
0
1
AVG[2:0]
1XX
000
001
SFTR[7:5]
AVG1
X
Note: The default for the AVG[2:0] bits is ‘010’b.
To calculate conversion cycle timing for a given averaging mode:
Total Conversion Time = (TEMP_CONV)*96/(45kHz +/-10%)+ (VOLT_CONV)*68/(45kHz +/-10%)
Example: To calculate the nominal conversion time FOR AVG[2:0] = 001b.
Total Conversion Time = (TEMP_CONV)*96/(45kHz)+ (VOLT_CONV)*68/(45kHz)
Total Conversion Time = (16+16+1)*96/(45kHz)+ (5*1)*68/(45kHz)
Total Conversion Time = (33)*2.133ms+ (5)*1.511ms = ~78ms
Table 5.2
modes.
Notes:
Continuous Monitoring Mode
In the continuous monitoring mode, the sampling and conversion process is performed continuously
for each voltage and temperature reading after the Start bit is set high. The time for each voltage and
temperature reading is shown above for each measurement option.
0
0
1
Compute total number of temperature conversions (TEMP_CONV)
Compute total number of voltage conversions (VOLT_CONV)
Calculate Time to complete all conversions is:
The hardware monitor conversion clock is 45KHz ± 10%.
Temperature conversions take 96 clocks, each (2.133ms nom.); Voltage conversions take 68
clocks, each (1.511ms nom).
AVG0
(2x128)+(1x8)=264
TEMPERATURE
illustrates the min., nom., and max. conversion cycle timing for each of the four averaging
CONVERSIONS
(2x16)+(1x1)=33
X
X
0
1
3x16=48
3x32=96
TOTAL
REMOTE
DIODE 1
128
16
16
32
Table 5.2 Conversion Cycle Timing
Table 5.1 AVG[2:0] Bit Decoder
REMOTE
DIODE 2
DATASHEET
128
CONVERSIONS
16
16
32
VOLTAGE
5x32=160
5x16=80
MEASUREMENTS PER READING
5x8=40
TOTAL
5x1=5
19
INTERNAL
DIODE
16
32
8
1
CONVERSION CYCLE TIME (MSEC)
(+2.5V, +5V, +12V, VCCP, AND VCC)
MIN.
567
203
406
71
ALL VOLTAGE READINGS
NOM.
624
223
447
78
16
32
Revision 0.4 (06-15-06)
8
1
MAX.
693
248
496
87