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TDA7439DS Просмотр технического описания (PDF) - STMicroelectronics

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TDA7439DS Datasheet PDF : 23 Pages
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I2C bus interface
Figure 12. Timing diagram of the data on the I2C bus
SCL
SDA
Data stable Data can change
when clock high when clock low
Figure 13. Timing diagram of the start/stop
TDA7439DS
SCL
SDA
Start
Stop
Figure 14. Timing diagram of the acknowledge
SCL
1
2
6
7
8
9
SDA
Start
MSB
Acknowledge
from receiver
4.6
Interface protocol
The interface protocol comprises:
" a start condition (S)
" a chip-address byte, containing the TDA7439DS address
" a sub-address byte including an auto address-increment bit
" a sequence of data bytes (N bytes + acknowledge)
" a stop condition (P).
Figure 15. SDA addressing and data
CHIP ADDRESS
SUBADDRESS
DATA 1 to DATA n
MSB
LSB
MSB
S 1 0 0 0 1 0 0 0 ACK X X X B
D96AU420
LSB
MSB
DATA
ACK
DATA
LSB
ACK P
S = Start, ACK = Acknowledge, B = Auto increment, P = Stop
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