Dtr/Dsr Mode Timing Diagram - Wiznet WIZ127SR User Manual

4.5.2.

DTR/DSR mode Timing Diagram

DTR
(Data Terminal Ready)
Start
Do not send
Check DTR
It is fine to send
Send a byte
Yes
Is there
any data
to send?
No
End
Figure 10. DTR signal timing diagram under DSR/DTR mode
DSR
(Data Set Ready)
Start
Device
Initialize
Yes No
Successful
Initialize?
Set DSR to Set DSR to
HIGH LOW
End
Figure 11. DSR signal Timing Diagram under DSR/DTR mode
WIZ127SR User's Manual
DTR
Tx 7 bits Data
DTR
Tx 8 bits Data
DTR
Tx 9 bits Data
DSR
Rx 7 bits Data
DSR
Rx 8 bits Data
DSR
Rx 9 bits Data
7 bits Data 7 bits Data
8 bits Data 8 bits Data
9 bits Data
7 bits Data 7 bits Data
8 bits Data 8 bits Data
9 bits Data
9 bits Data
9 bits Data
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