1°C Multiple Temperature Sensor with HW Thermal Shutdown & Hottest of Thermal Zones
Datasheet
The One Shot Register is used to initiate a one shot command. Writing to the one shot register, when
the device is in standby mode and BUSY bit (in Status Register) is ‘0’, will immediately cause the ADC
to update all temperature measurements. Writing to the One Shot Register while the device is in active
mode will have no affect.
5.8
External Diode Fault Register
Table 5.11 External Diode Fault Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
1Bh
R-C
External
Diode Fault
-
E6FLT E5FLT E4FLT E3FLT E2FLT
E1FLT
-
00h
The External Diode Fault Register indicates which of the external diodes caused the FAULT bit in the
Status Register to be set. These bits are cleared when read if the error condition has been removed.
Bit 6 - E6FLT - This bit is set if the External Diode 6 channel reported a diode fault.
Bit 5 - E5FLT - This bit is set if the External Diode 5 channel reported a diode fault.
Bit 4 - E4FLT - This bit is set if the External Diode 4 channel reported a diode fault.
Bit 3 - E3FLT - This bit is set if the External Diode 3 channel reported a diode fault.
Bit 2 - E2FLT - This bit is set if the External Diode 2 channel reported a diode fault.
Bit 1 - E1FLT - This bit is set if the External Diode 1 channel reported a diode fault.
5.9
Consecutive ALERT Register
Table 5.12 Consecutive ALERT Register
ADDR.
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
22h
R/W
Consecutive
ALERT
TIME
OUT
-
-
-
CAL
RT2
CAL
RT1
CAL
RT0
-
70h
The Consecutive ALERT Register determines how many times an out-of-limit error or diode fault must
be detected in consecutive measurements before the interrupt status registers are asserted.
Each out of limit error and diode fault condition has its own counter associated with it. Each counter
is incremented whenever the corresponding channel exceeds the appropriate limit. Additionally, each
counter is reset if the condition has been removed. (i.e. if External Diode 1 exceeds its high limit, it
will increment the high counter. If, on the next measurement, it experiences a diode fault, the high limit
counter will be reset and the diode fault counter will be incremented).
When the consecutive alert counter reaches its programmed value then the STATUS bit(s) for that
channel and the error condition will be set to ‘1’. Measurements will continue normally.
For example, if the CALRT[2:0] bits are set for 4 consecutive alerts on an EMC1046/EMC1047 device,
the high limits are set at 70°C, and none of the channels are masked, then the status bits will be
asserted after the following four measurements:
1. Internal Diode reads 71°C and both external diodes read 69°C. Consecutive alert counter for INT
is incremented to 1.
Revision 0.62 (03-05-08)
SMSC EMC1046/EMC1047
DATA2S8HEET
SMSC [ SMSC CORPORATION ]
