EMC2303-1-KZ-TR SMSC, EMC2303-1-KZ-TR Datasheet - Page 65

• Manufacturer Part Number: EMC2303-1-KZ-TR
• Description: Industrial Temperature Sensors RPM B Fan Controller w/HW Thermal Shutdwn
• Manufacturer: SMSC

Specifications of EMC2303-1-KZ-TR

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

Fan Control Device with High Frequency PWM and Temperature Monitors
Datasheet
APPLICATION NOTE: All three Zone Low Temperature Limit registers must be programmed to a valid value (other
SMSC EMC2300
8.2.17
8.2.18
Register
Address
Register
Address
6Ch
67h
68h
69h
6Ah
6Bh
Read/
Read/
Write
Write
R/W
R/W
R/W
R/W
R/W
R/W
Registers 67-69h: Zone Low Temperature Limit
These registers become read only when the Lock bit is set. Any further attempts to write to these
registers shall have no effect.
These are the temperature limits for the individual zones. When the current temperature equals this
limit, the fan will be turned on if the Minimum PWM is set to 00h. When the temperature exceeds this
limit, the fan speed will be increased according to the auto fan algorithm based on the setting in the
Zone x Range / PWMx Frequency register. Default = -127 ° C=80h
Registers 6A-6Ch: Absolute Temperature Limit
-127 ° c
LIMIT
127 ° c
-50 ° c
50 ° c
0 ° c
.
.
.
.
.
.
.
.
.
.
.
.
than 80h) to allow the AutoFan control to operate.
Zone 1 Temp Absolute Limit
Zone 2 Temp Absolute Limit
Zone 3 Temp Absolute Limit
Zone 1 Low Temp Limit
Zone 2 Low Temp Limit
Zone 3 Low Temp Limit
Table 8.32 Registers 67-69h: Zone Low Temperature Limit
Table 8.34 Registers 6A-6Ch: Absolute Temperature Limit
Register Name
Register Name
Table 8.33 Temperature Limit vs. Register Setting
DATASHEET
LIMIT (DEC)
(MSb)
(MSb)
Bit 7
Bit 7
7
7
7
7
7
7
-127
127
-50
50
0
.
.
.
.
.
.
.
.
.
.
.
.
65
Bit 6
Bit 6
6
6
6
6
6
6
Bit 5
Bit 5
5
5
5
5
5
5
Bit 4
Bit 4
4
4
4
4
4
4
Bit 3
Bit 3
3
3
3
3
3
3
Bit 2
Bit 2
2
2
2
2
2
2
LIMIT (HEX)
Bit 1
Bit 1
CEh
Revision 0.32 (06-23-08)
7Fh
81h
00h
32h
1
1
1
1
1
1
.
.
.
.
.
.
.
.
.
.
.
.
(LSb)
(LSb)
Bit 0
Bit 0
0
0
0
0
0
0
Default
Default
Value
Value
80h
80h
80h
64h
64h
64h