ATS75D8 ETC2 [List of Unclassifed Manufacturers], ATS75D8 Datasheet - Page 6

• Manufacturer Part Number: ATS75D8
• Description: LOW- OLTAGE 2-WIRE DIGITAL TEMPERATURE SENSOR With Thermal Alarm
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

Registers
The ATS75 contains the following five registers:
1)
2)
3)
4)
5)
All of these registers can be accessed by the user via the
digital serial interface at anytime (see Serial Interface
Operation for instructions). A detailed description of these
registers and their functions is provided in the following
paragraphs. A diagram of the register hierarchy is shown
in Figure 2.
© Andigilog, Inc. 2005
Command Register
Temperature Register
Configuration Register
Over-Limit-Signal Temperature Register (T
Hysteresis Temperature Register (T
MSB
0
Figure 3. Command Register Format
0
0
0
Command Register
1-byte Write Only
sda
Serial Interface
0
Command
(‘Pointer’)
0
scl
Data
HYST
Figure 2. aTS75 Register Hierarchy
P1
)
OS
)
LSB
P0
Read/Write
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Data
- 6 -
Command Register
The Command Register is a one-byte (8-bit) write-only
register.
indicates which of the other four registers (Temperature,
Configuration, T
or write to during an upcoming operation. In other words
the Command Register “points” to the selected register as
shown in Figure 2.
The Command Register is illustrated in Figure 3. The P1
and P0 bits of the Command Register determine which
register is to be accessed as shown in Table 2. The six
MSBs of the Command Register must always be zero.
Writing a 1 into any of these bits will cause the current
operation to be terminated.
The
between operations. Therefore, this register only needs to
be updated once for consecutive read operations from the
same register. All bits in the Command Register default to
zero at power-up.
Table 2. Register Assignments for Command Bits P1
Command
The data stored in the Command Register
Command Reg. = 00000000
Command Reg. = 00000001
Command Reg. = 00000010
Command Reg. = 00000011
Temperature Register
Configuration Register
T
T
Configuration Register
HYST
OS
Temperature Register
HYST
1-byte Read/Write
2-byte Read/Write
2-byte Read Only
Register
2-byte Read/Write
T
Register
Register
T
HYST
, or T
Register
OS
Register
Register
OS
and P2
) the user intends to read from
retains
April 2006 - 70A03204
pointer
P1
0
0
1
1
P0
0
1
0
1
aTS75
information