LM83_15 Datasheet, PDF (15/22 Pages) Texas Instruments – Triple-Diode Input and Local Digital Temperature Sensor with Two-Wire Interface

1.0 Functional Description (Continued)
Command Se-
lect Address
<P7:P0> hex
5Ch-6Fh and
F0h-FDh
FEh
FFh
Power On Default State
<D7:D0> binary <D7:D0> deci-
mal
0000 0001
1
Register Name
Register Function
RMID
RSR
Reserved for Future Use
Read Manufacturers ID
Read Stepping or Die
Revision Code
2.2 LOCAL and D1, D2 and D3 REMOTE TEMPERATURE REGISTERS (LT, D1RT, D2RT, and D3RT)
(Read Only Address 00h, 01h, 30h and 31h):
D7 D6 D5 D4 D3 D2 D1 D0
MSB Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 LSB
D7–D0: Temperature Data. One LSB = 1˚C. Two’s complement format.
2.3 STATUS REGISTERS 1 and 2
2.3.1 Status Register 1 (SR1) (Read Only Address 02h):
D7
D6
D5
D4
D3
D2
D1
0
LHIGH
0
D2RHIGH
0
D2OPEN D2CRIT
Power up default is with all bits “0” (zero).
D0: LCRIT: When set to a 1 indicates an Local Critical Temperature alarm.
D1: D2CRIT: When set to a 1 indicates a Remote Diode 2 Critical Temperature alarm.
D2: D2OPEN: When set to 1 indicates a Remote Diode 2 disconnect.
D4: D2RHIGH: When set to 1 indicates a Remote Diode 2 HIGH Temperature alarm.
D6: LHIGH: When set to 1 indicates a Local HIGH Temperature alarm.
D7, D5, and D3: These bits are always set to 0 and reserved for future use.
D0
LCRIT
Status Register 2
2.3.2 Status Register 2 (SR2) (Read Only Address 35h):
D7
D6
D5
D4
D3
D2
D1
D1RHIGH
0
D1OPEN D3RHIGH
0
D3OPEN D3CRIT
Power up default is with all bits “0” (zero).
D0: D1CRIT, when set to 1 indicates a Remote Diode 1 Critical Temperature alarm.
D1: D3CRIT, when set to 1 indicates a Remote Diode 3 Critical Temperature alarm.
D2: D3OPEN, when set to 1 indicates a Remote Diode 3 disconnect.
D4: D3RHIGH, when set to 1 indicates a Remote Diode 3 HIGH Temperature alarm.
D5: D1OPEN, when set to 1 indicates a Remote Diode 1 disconnect.
D7: D1RHIGH, when set to 1 indicates a Remote Diode 1
HIGH Temperature alarm.
D6, and D3: These bits are always set to 0 and reserved for future use.
2.4 MANUFACTURERS ID REGISTER
(Read Address FEh) Default value 01h.
D0
D1CRIT
2.5 CONFIGURATION REGISTER
(Read Address 03h/Write Address 09h):
D7
D6
D5
D4
D3
D2
D1
D0
INT mask
0
D1
D2
D3
Local
INT Inversion
0
T_CRIT_A T_CRIT_A T_CRIT_A T_CRIT_A
mask
mask
mask
mask
Power up default is with all bits “0” (zero).
D7: INT mask: When set to 1 INT interrupts are masked.
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