LM 92
www.ti.com
SNIS110D MARCH 2000REVISED MARCH 2013
DEFAULT SETTINGS
The LM92 always powers up in a known state. LM92 power up default conditions are:
1. Comparator Interrupt Mode
2. T
LOW
set to 10 癈
3. T
HIGH
set to 64 癈
4. T_CRIT set to 80 癈
5. T
HYST
set to 2 癈
6. INT and T_CRIT_A active low
7. Pointer set to 00 ; Temperature Register
The LM92 registers will always reset to these default values when the power supply voltage is brought up from
zero volts as the supply crosses the voltage level plotted in the following curve. The LM92 registers will reset
again when the power supply drops below the voltage plotted in this curve.
Figure 6. Average Power on Reset Voltage vs Temperature
SERIAL BUS INTERFACE
The LM92 operates as a slave on the Serial Bus, so the SCL line is an input (no clock is generated by the LM92)
and the SDA line is a bi-directional serial data line. According to Serial Bus specifications, the LM92 has a 7-bit
slave address. The five most significant bits of the slave address are hard wired inside the LM92 and are
10010 . The two least significant bits of the address are assigned to pins A1A0, and are set by connecting
these pins to ground for a low, (0); or to +V
S
for a high, (1).
Therefore, the complete slave address is:
1
0
0
1
0
A1
A0
MSB
LSB
Copyright ?20002013, Texas Instruments Incorporated
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