emc1413 Standard Microsystems Corp., emc1413 Datasheet - Page 37

• Manufacturer Part Number: emc1413
• Description: 1?c Temperature Sensor With Beta Compensation And Selectable Address
• Manufacturer: Standard Microsystems Corp.

1°C Temperature Sensor with Beta Compensation and Selectable Address
Datasheet
SMSC EMC1413 / EMC1414
6.14
ADDR.
27h
28h
31h
8h - Fh
HEX
0h
1h
2h
3h
4h
5h
6h
7h
R/W
R/W
R/W
R/W
circuit may introduce measurement errors. When measuring a discrete thermal diode (such as
2N3904) or a CPU diode that functions like a discrete thermal diode (such as an AMD processor
diode), then the BETAx[2:0] bits should be set to ‘111b’.
These registers store the ideality factors that are applied to the external diodes.
Factor Look-Up Table (Diode Model)"
Compensation and Resistance Error Correction automatically correct for most diode ideality errors,
therefore it is not recommended that these settings be updated without consulting SMSC.
External Diode Ideality Factor Registers
REGISTER
External
External
External
Diode 1
Diode 2
Diode 3
Ideality
Ideality
Ideality
Factor
Factor
Factor
ENABLEX
0
0
0
0
0
0
0
0
1
Table 6.17 Ideality Configuration Registers
B7
-
-
-
Table 6.16 CPU Beta Values
B6
DATASHEET
-
-
-
X
2
0
0
0
0
1
1
1
1
defines each setting and the corresponding ideality factor. Beta
B5
37
BETAX[2:0]
B4
X
1
0
0
1
1
0
0
1
1
IDEALITY1[5:0]
IDEALITY2[5:0]
IDEALITY3[5:0]
B3
B2
X
0
0
1
0
1
0
1
0
1
B1
0.11
0.18
0.25
0.33
0.43
1.00
2.33
Disabled
Autodetection
Revision 1.37 (12-23-09)
MINIMUM BETA
B0
Table 6.18, "Ideality
DEFAULT
12h
12h
12h