lm99-1cimm National Semiconductor Corporation, lm99-1cimm Datasheet - Page 16

• Manufacturer Part Number: lm99-1cimm
• Description: ?1?c Accurate, High Temperature, Remote Diode Temperature Sensor With Two-wire Interface
• Manufacturer: National Semiconductor Corporation

www.national.com
2.0 LM99 Registers
2.4 CONFIGURATION REGISTER
Power up default is with all bits “0” (zero)
D7: ALERT mask: When set to “1” ALERT interrupts are masked.
D6: RUN/STOP: When set to “1” SHUTDOWN is enabled.
D5: is not defined and defaults to “0”.
D4: Remote T_CRIT_A mask: When set to “1” a diode temperature reading that exceeds T_CRIT_A setpoint will not activate the
T_CRIT_A pin.
D3: is not defined and defaults to “0”.
D2: Local T_CRIT_A mask: When set to “1” a Local temperature reading that exceeds T_CRIT_A setpoint will not activate the
T_CRIT_A pin.
D1: is not defined and defaults to “0”.
D0: Fault Queue: when set to “1” three consecutive remote temperature measurements outside the HIGH, LOW, or T_CRIT
setpoints will trigger an “Outside Limit” condition resulting in setting of status bits and associated output pins..
2.5 CONVERSION RATE REGISTER
2.6 LOCAL and REMOTE HIGH SETPOINT REGISTERS (LHS, RHSHB, and RHSLB)
For LHS and RHSHB: HIGH setpoint temperature data. Power-on default is LHIGH = RHIGH = 70˚C. 1 LSB = 1˚C. Two’s
complement format.
For RHSLB: Remote HIGH Setpoint Low Byte temperature data. Power–on default is 0˚C. 1 LSB = 0.125˚C. Two’s complement
format.
2.7 LOCAL and REMOTE LOW SETPOINT REGISTERS (LLS, RLSHB, and RLSLB)
For LLS and RLSHB: HIGH setpoint temperature data. Power-on default is LHIGH = RHIGH = 0˚C. 1 LSB = 1˚C. Two’s
complement format.
For RLSLB: Remote HIGH Setpoint Low Byte temperature data. Power-on default is 0˚C. 1 LSB = 0.125˚C. Two’s complement
format.
(Read Address 03h / Write Address 09h):
ALERT mask
D7
(Read Address 04h / Write Address 0Ah)
Value
00
01
02
03
04
05
RUN/STOP
D6
(Read Address 05h, 07h / Write Address 0Bh, 0Dh):
(Read / Write Address 13h):
(Read Address 06h, 08h, / Write Address 0Ch, 0Eh):
(Read / Write Address 14h):
Value
Value
Value
Value
Conversion Rate
BIT
BIT
BIT
BIT
62.5 mHz
125 mHz
250 mHz
500 mHz
(Continued)
1 Hz
2 Hz
D5
0
SIGN
SIGN
0.5
0.5
D7
D7
D7
D7
Remote T_CRIT_A
0.25
0.25
D6
D6
D6
D6
64
64
mask
D4
0.125
0.125
D5
D5
D5
D5
32
32
16
D4
D4
D4
D4
16
16
0
0
D3
0
D3
D3
D3
D3
8
0
8
0
(Read Address 04h / Write Address 0Ah)
10-255
D2
D2
D2
D2
Value
4
0
4
0
Local T_CRIT_A
06
07
08
09
mask
D2
D1
D1
D1
D1
2
0
2
0
D0
D0
D0
D0
Conversion Rate
1
0
1
0
Undefined
16 Hz
32 Hz
4 Hz
8 Hz
D1
0
Fault Queue
D0