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LDLL16ENTR Datasheet(PDF) 39 Page - STMicroelectronics

Part # LDLL16ENTR
Description  16-channel LED driver with automotive CAN FD light interface
PDF  102 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LDLL16ENTR Datasheet(HTML) 39 Page - STMicroelectronics

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5.7
Unicast frames
5.7.1
Unicast request frame
The commander may request an action from a particular responder by sending a unicast request frame, which
uses the responder ID in the CAN FD ID field preceded by "0" to distinguish the commander request from the
responder reply. The MSB of all CAN FD IDs used for unicast frames in the network is "0" to distinguish between
unicast and broadcast frames.
Figure 28. Unicast request communication between commander and responders
Commander
Error
detected?
Send Broadcast
Frame
(Broadcast ID)
Receive Frame
Send ACK
Receive ACK
Error
detected?
No
Transmission
Successful
Increase TEC /
Send Error
Frame
Receive Error
Frame
Yes
Responder
Yes
No
End
Transmission
End
Transmission
Reception
Successful
End
Transmission
In case the unicast frame contains data, the first data byte contains OP code (bits 7-6) and register address (bits
5-0). The operation code represents the instruction to be performed; while the following 6 bits represent the
address on which the operation will be performed.
The next four data bytes contain the optional data.
LDLL16EN
Communication interface
DS14111 - Rev 5
page 39/102



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