1°C Temperature Sensor with Hardware Thermal Shutdown
Datasheet
Chapter 6 Register Description
The registers shown in Table 6.1 are accessible through the SMBus. An entry of ‘-’ indicates that the
bit is not used and will always read ‘0’.
Table 6.1 Register Set in Hexadecimal Order
DEFAULT
REGISTER
ADDRESS
R/W
REGISTER NAME
FUNCTION
VALUE
PAGE
00h
01h
02h
03h
R
Internal Diode Data
High Byte
Stores the integer data for the
Internal Diode
00h
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R
R
External Diode Data
High Byte
Stores the integer data for the
External Diode
00h
00h
00h
Status
Stores the status bits for the
Internal Diode and External Diodes
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R/W
Configuration
Controls the general operation of
the device (mirrored at address
09h)
04h
05h
06h
07h
08h
09h
0Ah
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Conversion Rate
Controls the conversion rate for
updating temperature data
(mirrored at address 0Ah)
06h
(4/sec)
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Internal Diode High
Limit
Stores the 8-bit high limit for the
Internal Diode (mirrored at address
0Bh)
55h
(85°C)
Internal Diode Low
Limit
Stores the 8-bit low limit for the
Internal Diode (mirrored at address
0Ch)
00h
(0°C)
External Diode High
Limit High Byte
Stores the integer portion of the
high limit for the External Diode
(mirrored at register 0Dh)
55h
(85°C)
External Diode Low
Limit High Byte
Stores the integer portion of the
low limit for the External Diode
(mirrored at register 0Eh)
00h
(0°C)
Configuration
Controls the general operation of
the device (mirrored at address
03h)
00h
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Page 28
Conversion Rate
Controls the conversion rate for
updating temperature data
(mirrored at address 04h)
06h
(4/sec)
Revision 1.24 (02-05-08)
SMSC EMC1422
DATA2S4HEET
SMSC [ SMSC CORPORATION ]
