Texas Instruments 990 User Manual page 245
Dx10 hdlc communications package
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Also See for 990:
- Operation manual (276 pages) ,
- Manual (211 pages) ,
- Installation and operation manual (122 pages)
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Communications Structures
0.4.1
When
a
appears
2280626
where:
Flag
Addr
Packet with User Data
data packet is transmi tted over the data link the
on the line as follows:
~
I FIELD
ADDR.
PACKET HEADER
USER DATA
is the start-of-frame and end-of-frame flag, >7E.
is the switch address of the secondary station.
format
I field includes the packet header, X (see next entry),
and
the user data.
X
is the session control word and the destination
and
source IDs.
CRC
is the frame check ch aracter.
2270526-9701
0-11
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