LM70CIMM-3/HALF National Semiconductor, LM70CIMM-3/HALF Datasheet - Page 10

• Manufacturer Part Number: LM70CIMM-3/HALF
• Manufacturer: National Semiconductor

Specifications of LM70CIMM-3/HALF

• Lead Free Status / Rohs Status: Supplier Unconfirmed

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1.0 Functional Description
1.5 INTERNAL REGISTER STRUCTURE
The LM70 has three registers, the temperature register, the
configuration register and the manufacturer’s/device identifi-
cation register. The temperature and manufacturer’s/device
identification registers are read only. The configuration reg-
ister is write only.
1.5.1 CONFIGURATION REGISTER
(Selects shutdown or continuous conversion modes):
D0-D15 set to XX FF hex enables shutdown mode.
D0-D15 set to XX 00 hex enables continuous conversion
mode.
Note: setting D0-D15 to any other values may place the
LM70 into a manufacturer’s test mode, upon which the LM70
1.5.2 TEMPERATURE REGISTER
D0–D1: Undefined. TRI-STATE will be output on SI/0.
D2–D4: Always set high.
1.5.3 MANUFACTURER’S/DEVICE ID REGISTER
D0–D1: Undefined. TRI-STATE will be output on SI/0.
D2-D4: Always set LOW.
(Write Only):
(Read Only):
(Read Only):
MSB
D15
D15
D15
X
1
Bit 9
D14
D14
D14
X
0
Bit 8
D13
D13
D13
X
0
Bit 7
D12
D12
D12
X
0
Bit 6
D11
D11
D11
X
0
Bit 5
D10
D10
D10
X
0
(Continued)
Bit 4
D9
D9
D9
X
0
Bit 3
D8
D8
D8
X
1
10
Bit 2
D7
D7
D7
will stop responding as described. These test modes are to
be used for National Semiconductor production testing only.
See Section 1.2 Serial Bus Interface for a complete discus-
sion.
D5–D15: Temperature Data. One LSB = 0.25˚C. Two’s
complement format.
D5–D15: Manufacturer’s ID Data. This register is accessed
whenever the LM70 is in shutdown mode.
0
Bit 1
D6
D6
D6
0
LSB
D5
D5
D5
0
D4
D4
D4
Shutdown
1
0
D3
D3
D3
1
0
D2
D2
D2
1
0
D1
D1
D1
X
X
D0
D0
D0
X
X