EMC1046 Standard Microsystems Corp., EMC1046 Datasheet - Page 29

• Manufacturer Part Number: EMC1046
• Description: 1 Degree C Multiple Temperature Sensor With Beta Compensation And Hottest Of Thermal Zones
• Manufacturer: Standard Microsystems Corp.

1°C Multiple Temperature Sensor with Beta Compensation and Hottest of Thermal Zones
Datasheet
APPLICATION NOTE: If one of the fault queues is not cleared and the CALRT[2:0] bits are updated, the update
SMSC EMC1046/EMC1047
5.10
ADDR.
25h
26h
2
0
0
0
1
Beta Configuration Register
R/W
R/W
R/W
2. Both the Internal Diode and the External Diode 1 read 71°C and External Diode 2 reads 68°C.
3. The External Diode 1 reads 71°C and both the Internal Diode and External Diode 2 read 69°C.
4. The Internal Diode reads 71°C and both external diodes read 71°C. Consecutive alert counter for
5. The Internal Diode reads 71°C and both the external diodes read 71°C. Consecutive alert counter
Bit 7 - TIMEOUT - Determines whether the SMBus Timeout function is enabled.
Bits 3-1 - CALRT[2:0] - Determine the number of consecutive measurements that must have an out of
limit condition or diode fault before the STATUS bits is asserted. All temperature channels use this
value to set the respective counters. The bits are decoded as shown in
is 1 consecutive out of limit conversion.
‘0’ (default) - The SMBus Timeout feature is disabled. The SMCLK line can be held low indefinitely
without the device resetting its SMBus protocol.
‘1’ - The SMBus Timeout feature is enabled. If the SMCLK line is held low for more than 30ms,
then the device will reset the SMBus protocol.
Consecutive alert counter for INT is incremented to 2 and for EXT1 is set to 1.
Consecutive alert counter for INT and EXT2 are cleared and EXT1 is incremented to 2.
INT is set to 1, EXT2 is set to 1, and EXT1 is incremented to 3.
for INT is incremented to 2, EXT2 is set to 2, and EXT1 is incremented to 4. The HIGH status bit
are set for EXT1. The EXT1 counter is reset to 0 and all other counters hold the last value until
the next temperature measurement.
All Others
Diode 1 Beta
Configuration
Diode 2 Beta
Configuration
REGISTER
won’t take affect until fault queue is cleared. All the fault queues are independent so those
that are empty will be updated immediately.
External
External
1
0
0
1
1
Table 5.14 Beta Configuration Register
Table 5.13 Consecutive Alert Settings
B7
-
-
0
0
1
1
1
B6
-
-
DATASHEET
B5
-
-
29
NUMBER OF CONSECUTIVE OUT OF LIMIT
B4
-
-
AUTO1
AUTO2
1 (default for CALRT[2:0])
B3
MEASUREMENTS
1 (CALRT[2:0]),
B2
2
3
4
BETA1[2:0]
BETA2[2:0]
Table
B1
5.13. The default setting
Revision 0.66 (06-02-08)
B0
DEFAULT
08h
08h