Z85233 Datasheet, PDF (49/317 Pages) Zilog, Inc. – The Zilog SCC Serial Communication Controller

SCC™/ESCC™ User’s Manual
Interfacing the SCC/ESCC
2.4 INTERFACE PROGRAMMING (Continued)
START
Write Last Data
TxIP=1 ?
No
(TBE=1)
Yes
Issue
Reset Tx IP command
No
Underrun/EOM
INT?
Yes
Issue Ext/Stat Int cmd
(to clear Ext/stat INT)
ESCC
Write data for next
packet (max. 4 Bytes)
ESCC or
NMOS/CMOS
NMOS/CMOS
TxIP=1 ?
No
(TBE=1)
Yes
Write 1st byte of
Next Packet (1 byte)
End
Figure 2-22. Flowchart example of processing an end of packet
2-30
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