Datasheet

D7 D6 D5 D4 D3 D2 D1 D0
1 9 1 9
Ack
by
LM73
SMBCLK
(continued)
SMBDAT
(continued)
Stop
by
Master
D15 D14 D13 D12 D11 D10 D9 D8
Ack
by
LM73
Frame 3
Data Byte to LM73
Frame 4
Data Byte to LM73
1 9 1 9
Ack
by
LM73
Start by
Master
SMBCLK
SMBDAT
R/W
0 1 A2 A0
1 0
A1
Ack
by
LM73
Frame 1
Serial Bus Address Byte
Frame 2
Pointer Byte
0 0 0 0 0 P2 P1 P0
1 9 1 9
Ack
by
LM73
Start by
Master
SMBCLK
SMBDAT
R/W
0 1 A2 A0
1 0
A1
Ack
by
LM73
Frame 1
Serial Bus Address Byte
Frame 2
Pointer Byte
0 0 0 0 0 P2 P1 P0
D7 D6 D5 D4 D3 D2 D1 D0
1 9
Frame 3
Data Byte to LM73
Ack
by
LM73
Stop
by
Master
LM73
SNIS141D –OCTOBER 2005–REVISED MAY 2009 www.ti.com
(a) Typical 1-Byte Write
(b) Typical 2-Byte Write
Figure 10. Writing to the LM73
SHUTDOWN MODE
Shutdown Mode is enabled by writing a “1” to the Full Power Down Bit, Bit 7 of the Configuration Register, and
holding it high for at least the specified maximum conversion time at the existing temperature resolution setting.
(see Temperature Conversion Time specifications under the TEMPERATURE-TO-DIGITAL CONVERTER
CHARACTERISTICS section). For example, if the LM73 is set for 12-bit resolution before shutdown, then Bit 7 of
the Configuration register must go high and stay high for the specified maximum conversion time for 12-bits
resolution.
The LM73 will always finish a temperature conversion and update the temperature registers before shutting
down.
Writing a “0” to the Full Power Down Bit restores the LM73 to normal mode. The user should wait at least the
specified maximum conversion time, at the existing resolution setting, before accurate data appears in the
temperature register.
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