EMC1404 SMSC Corporation, EMC1404 Datasheet - Page 28

• Manufacturer Part Number: EMC1404
• Description: (EMC1403 / EMC1404) Temperature Sensor
• Manufacturer: SMSC Corporation

Revision 1.16 (03-15-07)
6.1
6.2
REGISTER
ADDRESS
ADDR
00h
29h
01h
10h
23h
24h
2Ah
2Bh
FDh
FEh
FFh
40h
Data Read Interlock
Temperature Data Registers
R/W
When any temperature channel high byte register is read, the corresponding low byte is copied into
an internal ‘shadow’ register. The user is free to read the low byte at any time and be guaranteed that
it will correspond to the previously read high byte. Regardless if the low byte is read or not, reading
from the same high byte register again will automatically refresh this stored low byte data.
As shown in
the integer value and the low byte representing the fractional value left justified to occupy the MSBits.
R
R
R
R
R
R
R
R
R/W
R/W
R
R
R
External Diode
External Diode
External Diode
External Diode
External Diode
External Diode
Internal Diode
Internal Diode
1 High Byte
2 High Byte
3 High Byte
REGISTER
1 Low Byte
2 Low Byte
3 Low Byte
High Byte
Low Byte
Table
Table 6.1 Register Set in Hexadecimal Order (continued)
REGISTER NAME
Filter Control
Product ID
6.2, all temperatures are stored as an 11-bit value with the high byte representing
SMSC ID
Revision
Table 6.2 Temperature Data Registers
128
128
128
128
B7
0.5
0.5
0.5
0.5
DATASHEET
0.25
0.25
0.25
0.25
B6
64
64
64
64
Controls the digital filter setting for
Stores a fixed value that identifies
represents the revision number
the External Diode 1 channel
28
Stores a fixed value that
Stores a fixed value that
0.125
0.125
0.125
0.125
B5
32
32
32
32
represents SMSC
each product
FUNCTION
B4
16
16
16
16
-
-
-
-
1°C Temperature Sensor with Beta Compensation
B3
8
8
8
8
-
-
-
-
B2
4
4
4
4
-
-
-
-
B1
DEFAULT
Table 6.24
2
2
2
2
-
-
-
-
SMSC EMC1403/EMC1404
VALUE
5Dh
00h
01h
B0
1
1
1
1
-
-
-
-
DEFAULT
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