LM82CIMQA National Semiconductor, LM82CIMQA Datasheet - Page 13

• Manufacturer Part Number: LM82CIMQA
• Description: IC,SSOP,16PIN
• Manufacturer: National Semiconductor

Specifications of LM82CIMQA

• Rohs Compliant: NO

2.0 LM82 Registers
2.2 LOCAL and REMOTE TEMPERATURE REGISTERS (LT, and RT)
D7–D0: Temperature Data. One LSB = 1˚C. Two’s complement format.
2.3 STATUS REGISTER
Power up default is with all bits “0” (zero).
D0: LCRIT: When set to a 1 indicates an Local Critical Temperature alarm.
D1: RCRIT: When set to a 1 indicates a Remote Diode Critical Temperature alarm.
D2: D2OPEN: When set to 1 indicates a Remote Diode disconnect.
D4: D2RHIGH: When set to 1 indicates a Remote Diode 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.
2.4 MANUFACTURERS ID AND DIE REVISION (Stepping) REGISTERS
(Read Address FEh and FFh) Default value 01h for Manufacturers ID(FEh ).
2.5 CONFIGURATION REGISTER
Power up default is with all bits “0” (zero).
D7: INT mask: When set to 1 INT interrupts are masked.
D5: T_CRIT mask, this bit must be set to a 1 before the T_CRIT setpoint is lowered below 127 in order for T_CRIT_A pin to
function properly.
D4: T_CRIT mask for Remote temperature, when set to 1 a remote temperature reading that exceeds T_CRIT setpoint will not
activate the T_CRIT_A pin.
D3: T_CRIT mask, this bit must be set to a 1 before the T_CRIT setpoint is lowered below 127 in order for T_CRIT_A pin to
function properly.
D2: T_CRIT mask for Local reading, when set to 1 a Local temperature reading that exceeds T_CRIT setpoint will not activate
the T_CRIT_A pin.
D1: INT active state inversion. When INT Inversion is set to a 1 the active state of the INT output will be a logical high. A low would
then select an active state of a logical low.
D6 and D0: These bits are always set to 0 and reserved for future use. A write of 1 will return a 0 when read.
2.6 LOCAL AND REMOTE HIGH SETPOINT REGISTERS (LHS, RHS)
D7–D0: HIGH setpoint temperature data. Power up default is LHIGH = RHIGH=127˚C.
2.7 T_CRIT REGISTER (TCS)
D7–D0: T_CRIT setpoint temperature data. Power up default is T_CRIT = 127˚C.
(Read Address 03h/Write Address 09h):
INT mask
D7
(Read Only Address 02h):
D7
0
D6
0
LHIGH
D6
(Read Only Address 00h, and 01h):
(Read Address 05h, 07h/Write Address 0Bh, 0Dh):
(Read Address 42h/Write Address 5Ah):
MSB
MSB
MSB
D7
D7
D7
(Continued)
T_CRIT_A
Remote
mask
D5
Bit 6
Bit 6
Bit 6
D6
D6
D6
D5
0
Bit 5
Bit 5
Bit 5
D5
D5
D5
T_CRIT_A
Remote
RHIGH
mask
D4
D4
Bit 4
Bit 4
Bit 4
D4
D4
D4
13
Bit 3
Bit 3
Bit 3
D3
D3
D3
T_CRIT_A
Remote
D3
0
mask
D3
Bit 2
Bit 2
Bit 2
D2
D2
D2
OPEN
Bit 1
D2
Bit 1
Bit 1
D1
D1
D1
T_CRIT_A
Local
mask
D2
LSB
LSB
LSB
D0
D0
D0
RCRIT
D1
INT Inversion
D1
LCRIT
D0
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D0
0