EMC6D103S-CZC SMSC, EMC6D103S-CZC Datasheet - Page 30

• Manufacturer Part Number: EMC6D103S-CZC
• Description: Industrial Temperature Sensors Auto Fan Contrllr Up to 4 Fans
• Manufacturer: SMSC

Specifications of EMC6D103S-CZC

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

Revision 0.3 (03-01-07)
6.9.3
SENSOR ERROR
TEMPERATURE
+127
-127
+25
-50
-25
+50
+1
-1
0
There are Remote Diode (1 or 2) Fault status bits in Interrupt Status Register 2 (42h), which, when
one, indicate a short or open-circuit on remote thermal diode inputs (Remote x+ and Remote x-).
Before a remote diode conversion is updated, the status of the remote diode is checked. In the case
of a short or open-circuit on the remote thermal diode inputs, the value in the corresponding reading
register will be forced to 80h. Note that this will cause the associated remote diode limit exceeded
status bit to be set (i.e. Remote Diode x Limit Error bits (D1 and D2) are located in the Interrupt Status
1 Register at register address 41h).
The temperature change is computed by measuring the change in Vbe at two different operating points
of the diode to which the Remote x+ and Remote x- pins are connected. But accuracy of the
measurement also depends on non-ideality factor of the process the diode is manufactured on.
Temperature Data Format
Temperature data can be read from the three temperature registers:
The following table shows several examples of the format of the temperature digital data, represented
by an 8-bit, two’s complement word with an LSB equal to 1.0
0
0
0
0
0
C
0
0
0
C
0
C
C
C
C
C
C
C
Internal Temp Reading register (26h)
Remote Diode 1 Temp Reading register (25h)
Remote Diode 2 Temp Reading register (27h)
READING (DEC)
Fan Control Device with High Frequency PWM Support and Hardware Monitoring Features
Table 6.6 Temperature Data Format
-127
127
128
-50
-25
25
50
-1
0
1
DATASHEET
30
READING (HEX)
CEh
E7h
FFh
81h
00h
01h
19h
32h
7Fh
80h
0
C.
DIGITAL OUTPUT
1000 0001
0000 0000
0000 0001
0001 1001
0011 0010
1000 0000
1100 1110
1110 0111
1111 1111
0111 1111
SMSC EMC6D103
Datasheet