EVAL-ADT7410EBZ AD [Analog Devices], EVAL-ADT7410EBZ Datasheet - Page 19

• Manufacturer Part Number: EVAL-ADT7410EBZ
• Manufacturer: AD [Analog Devices]

READING DATA
Reading data from the ADT7410 is done in a single data byte
operation for the configuration register, the status register,
the T
operation is needed for the temperature value register, T
setpoint
register. Reading back the contents of an 8-bit register similar
to the configuration register is shown in 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 address of
the register that is going to be read from. In the case of reading
back from the 2-byte registers, the address pointer automatically
increments from the MSB register address to the LSB register
address.
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
pointer autoincrement except when reading back from a 16-bit
register. If the address pointer register has previously been set
up with the address of the register that is going to receive a read
command, there is no need to repeat a write operation to set up
the register address again.
HYST
register, T
REPEAT START
register, and the ID register. A two data byte read
SDA
SDA
SCL
SCL
BY MASTER
START BY
MASTER
LOW
setpoint
1
1
1
1
0
0
register, and the T
SERIAL BUS ADDRESS
0
0
SERIAL BUS ADDRESS
1
1
FRAME 3
FRAME 1
BYTE
BYTE
Figure 17. Reading Back Data from the Configuration Register
0
0
CRIT
A1
A2
setpoint
2
C address
A0
A0
HIGH
R/W
R/W
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ADT7410
ACK. BY
ADT7410
ACK. BY
9
9
D7
P7
1
1
RESET
To reset the ADT7410 without having to reset the entire I
an explicit reset command is provided. This uses a particular
address pointer word as a command word to reset the part and
upload all default settings. The ADT7410 does not respond to
the I
values upload for approximately 200 μs.
The reset command address word is 0x2F.
GENERAL CALL
When a master issues a slave address consisting of seven 0s with
the eighth bit (R/ W bit) set to 0, this is known as the general call
address. The general call address is for addressing every device
connected to the I
and reads in the following data byte.
If the second byte is 0x06, the ADT7410 is reset, completely
uploading all default values. The ADT7410 does not respond
to the I
default values upload for approximately 200 μs.
The ADT7410 does not acknowledge any other general call
commands.
D6
P6
2
DATA BYTE FROM CONFIGURATION
C bus commands (do not acknowledge) during the default
ADDRESS POINTER REGISTER BYTE
2
C bus commands (do not acknowledge) while the
D5
P5
P4
D4
REGISTER
FRAME 4
FRAME 2
2
C bus. The ADT7410 acknowledges this address
D3
P3
P2
D2
P1
D1
NO ACK. BY
D0
P0
ADT7410
MASTER
ACK. BY
9
9
STOP BY
MASTER
ADT7410
2
C bus,