EVAL-ADT7X20EBZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-ADT7X20EBZ' PDF : 24 Pages View PDF
ADT7420
Preliminary Technical Data
1
SCL
91
9
SDA
START
1
0
0
1
0 A1 A0 R/W
A7 A6
A1 A0
ADT7410 DEVICE ADDRESS
ACK. BY
ADT7420
REGISTER ADDRESS[A7:A0] ACK. BY
ADT7420
SR
1
9
1
9
SCL
SDA
10
A1 A0 R/W
D7 D6
D1 D0
D7 D6
D1 D0
REPEAT
START
ADT7410 DEVICE ADDRESS
ACK. BY
ADT7420
TEMPERATURE
VALUE REGISTER
MSB DATA
ACK. BY
MASTER
TEMPERATURE
VALUE REGISTER
LSB DATA
NO
ACK. BY
MASTER
NOTES
1. A START CONDITION AT THE BEGINNING IS DEFINED AS A HIGH-TO-LOW TRANSITION ON SDA WHILE SCL REMAINS HIGH.
2. A STOP CONDITION AT THE END IS DEFINED AS A LOW-TO-HIGH TRANSITION ON SDA WHILE SCL REMAINS HIGH.
3. THE MASTER GENERATES THE NO ACKNOWLEDGE AT THE END OF THE READBACK TO SIGNAL THAT IT DOES NOT WANT ADDITIONAL DATA.
4. TEMPERATURE VALUE REGISTER MSB DATA AND TEMPERATURE VALIUE REGISTER LSB DATA ARE ALWAYS SEPARATED BY A LOW ACK BIT.
5. THE R/W BIT IS SET TO A1 TO INDICATE A READBACK OPERATION.
Figure 17. Reading Back Data from the Temperature Value Register
Rev. PrA | Page 20 of 2
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