ADT75 Analog Devices, Inc., ADT75 Datasheet - Page 18

• Manufacturer Part Number: ADT75
• Description: ?1?c Accurate, 12-bit Digital Temperature Sensor
• Manufacturer: Analog Devices, Inc.

ADT75
READING DATA
Reading data from the ADT75 is done in a one data byte operation for the configuration register and a two data byte operation for the
temperature value register, T
Figure 17. Reading back the contents of the temperature value register is shown in Figure 18. Reading back from any register first requires
a single-byte write operation to the address pointer register to set up the register address of the register that is going to be read from. To
read from another register, execute another write to the address pointer register to set up the relevant register address. Thus, block reads are
not possible, that is, there is no I
that is going to receive a read command then there is no need to repeat a write operation to set up the register address again.
SDA
SCL
SDA (CONTINUED)
SCL (CONTINUED)
START BY
MASTER
SDA
SCL
START BY
MASTER
SDA
SCL
START BY
MASTER
1
1
1
1
0
Figure 16. Writing to the Address Pointer Register Followed by Two Bytes of Data to Either T
1
1
SERIAL BUS ADDRESS BYTE
0
D15
1
0
HYST
0
2
SERIAL BUS ADDRESS BYTE
D14
0
C auto-increment. If the address pointer register has previously been set up with the address of the register
SERIAL BUS ADDRESS
FRAME 1
register, and the T
1
0
1
D13
FRAME 1
A2
BYTE
FRAME 1
1
Figure 18. Reading Back Data from the Temperature Value Register
A1
D12
Figure 17. Reading Back Data from the Configuration Register
A1
SDA (CONTINUED)
SCL (CONTINUED)
A2
DATA BYTE
FRAME 3
A2
D11
A0
A1
OS
A0
setpoint register. Reading back the contents of the configuration register is shown in
R/W
D10
A0
ACK. BY
ADT75
R/W
ACK. BY
D9
Rev. 0 | Page 18 of 24
9
ADT75
R/W
ACK. BY
ADT75
9
D8
P7
1
ACK. BY
D7
1
9
ADT75
D7
1
P6
9
D15
D6
1
ADDRESS POINTER REGISTER BYTE
D6
LSB DATA BYTE FROM TEMPERATURE
D7
P5
1
D14
D5
DATA BYTE FROM CONFIGURATION
MSB DATA BYTE FROM TEMPERATURE
D5
D6
P4
D13
D4
VALUE REGISTER
FRAME 2
D4
FRAME 3
D5
P3
D12
VALUE REGISTER
D3
REGISTER
FRAME 2
D3
FRAME 2
D4
P2
D11
D2
DATA BYTE
FRAME 4
D2
D3
P1
HYST
D10
D1
or T
D1
D2
P0
D0
OS
D9
NO ACK. BY
MASTER
Registers
ACK. BY
ADT75
D0
NO ACK. BY
D1
MASTER
9
D8
9
9
ACK. BY
MASTER
D0
ACK. BY
ADT75
9
STOP BY
MASTER
STOP BY
MASTER
9
STOP BY
MASTER