9 local and remote t_crit registers (rcs and lcs), 10 t_crit hysteresis register (th), 11 filter and alert configure register – Rainbow Electronics LM86 User Manual
Page 16: 12 manufacturers id register, 13 die revision code register, 0 application hints, 0 lm86 registers
2.0 LM86 REGISTERS
(Continued)
For RLSLB: Remote HIGH Setpoint Low Byte temperature data. Power up default is 0˚C. 1LSB = 0.125˚C. Two’s complement
format.
2.8 REMOTE TEMPERATURE OFFSET REGISTERS (RTOHB and RTOLB)
(Read/Write Address 11h):
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
SIGN
64
32
16
8
4
2
1
For RTOHB: Remote Temperature Offset High Byte. Power up default is LHIGH = RHIGH = 0˚C. 1LSB = 1˚C. Two’s complement
format.
(Read/Write Address 12h):
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
0.5
0.25
0.125
0
0
0
0
0
For RTOLB: Remote Temperature Offset High Byte. Power up default is 0˚C. 1LSB = 0.125˚C. Two’s complement format.
The offset value written to these registers will automatically be added to or subtracted from the remote temperature measurement
that will be reported in the Remote Temperature registers.
2.9 LOCAL and REMOTE T_CRIT REGISTERS (RCS and LCS)
(Read/Write Address 20h, 19h):
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
SIGN
64
32
16
8
4
2
1
D7–D0: T_CRIT setpoint temperature data. Power up default is T_CRIT = 85˚C. 1 LSB = 1˚C, two’s complement format.
2.10 T_CRIT HYSTERESIS REGISTER (TH)
(Read and Write Address 21h):
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
16
8
4
2
1
D7–D0: T_CRIT Hysteresis temperature. Power up default is TH = 10˚C. 1 LSB = 1˚C, maximum value = 31.
2.11 FILTER and ALERT CONFIGURE REGISTER
(Read and Write Address BFh):
BIT
D7
D6
D5
D4
D3
D2
D1
D0
Value
0
0
0
0
0
Filter Level
ALERT
Configure
D7-D3: is not defined defaults to "0".
D2-D1: input filter setting as defined the table below:
D2
D1
Filter Level
0
0
No Filter
0
1
Level 1
1
0
Level 1
1
1
Level 2
Level 2 sets maximum filtering.
D0: when set to "1" comparator mode is enabled.
2.12 MANUFACTURERS ID REGISTER
(Read Address FEh) Default value 01h.
2.13 DIE REVISION CODE REGISTER
(Read Address FFh) Default value 11hexadecimal or 17 decimal. This register will increment by 1 every time there is a revision
to the die by National Semiconductor.
3.0 Application Hints
The LM86 can be applied easily in the same way as other
integrated-circuit temperature sensors, and its remote diode
sensing capability allows it to be used in new ways as well.
It can be soldered to a printed circuit board, and because the
path of best thermal conductivity is between the die and the
LM86
www.national.com
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