1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones
Datasheet
‘1’ - dynamic averaging is disabled. The ADC averaging factor will remain fixed at 1x for all
conversion rates and will allow increased power savings at the slower conversion rates.
Bit 1 - COMP - configures the device to perform a comparison for the Hotter of Two mode (see Section
3.3, "Operation During Run Mode," on page 11.)
‘0’ (default) - the device is in normal mode
‘1’ - the device is in Hotter of Two mode. In this mode, the two external diode channels are
measured and compared against each other. The hotter of the two channels has its data loaded
into the External Diode 2 Data Registers. The Internal Diode and External Diode 1 Data Registers
remain unaffected.
Bit 0 - REC - controls the Resistance Error Correction circuitry
'0' - - The Resistance Error Correction circuitry is disabled.
'1' (default) - The Resistance Error Correction circuitry is active and will automatically correct for
up to 100 ohms of series resistance in the diode lines for both External Diode 1 and External Diode
2 channels.
4.6
One Shot Register - (0Fh)
Table 4.6 One Shot Registers
B6 B5 B4 B3
ADDR
REGISTER
B7
B2
B1
B0
DEFAULT
0Fh
One Shot
Conversion
Writing to this register address initiates the one-shot. The data is not
important and is not stored
00h
The One Shot Register is an address place holder for the one-shot command. Writing to the address
initiates the command. The data written is not important and is not stored. Reading from the one-shot
registers will always return 00h.
4.7
Ideality Configuration Registers (27h - 28h)
Table 4.7 Ideality Configuration Registers
ADDR
REGISTER
B7
B6
B5
B5
B5
B4
B4
B4
B3
B3
B3
B2
B2
B2
B1
B1
B1
B0
B0
B0
DEFAULT
27h
28h
Diode 1 Ideality
Correction Factor
-
-
-
-
12h
(1.008)
Diode 2 Ideality
Correction Factor
12h
(1.008)
The Ideality Configuration Registers store the ideality correction factor that is applied to each external
diode.
The table below shows the ideality factor settings for the Ideality Configuration registers. Shading
indicates power-up default. All codes that are not listed are reserved and should not be used.
Beta 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.
Revision 1.37 (02-05-07)
SMSC EMC1053
DATA2S0HEET
SMSC [ SMSC CORPORATION ]
