Zilog Z16C35 - Manual (Page 245)

Application Note
Serial Communication Controller (SCC ™ ): SDLC Mode of Operation
11-2
SDLC TRANSMIT
Figure 1 shows the time chart for the transmitting SDLC
packet under interrupt control. When transmit is engaged,
data is shifted out of the transmitter on the falling edge of
the transmit clock. Transitions on the diagram are shown coincident with TxCLK fall — in actual practice, there are
some associated delay times (which are specified in the
data sheet).
Figure 1. Typical SDLC Trsnsmission Sequence
TxCLK
Tx Data
Opening Flag
Data 81H
Data 42H
Data 0FFH
Data 42H
CRC 0E013H
Closing Flag
Note 11
Note 9
/INT
Note 3
Note 4
➘
Note 5
➘
Note 7
➘
Note 6
Note 8
➘
Note 10
➘
Note 2
➘
Note 1
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