HD6433937 Datasheet, PDF (391/521 Pages) Hitachi Semiconductor – Hardware Manual

Table 12-31 FLEX DECODER PACKET SEQUENCE
PACKET
PACKET TYPE
1st
ADDRESS
2nd
ADDRESS
3rd
VECTOR
PHASE
A
A
A
4th
BIW
C
5th
BIW
C
6th
LONG
C
ADDRESS
7th
VECTOR
A
8th
MESSAGE A
9th
MESSAGE A
10th
MESSAGE A
11th
MESSAGE A
12th
MESSAGE A
13th
MESSAGE A
14th
MESSAGE A
15th
VECTOR
C
16th
MESSAGE C
17th
MESSAGE C
18th
MESSAGE C
WORD
NUMBER
N.A. (7)
N.A. (8)
7
N.A.
N.A.
N.A. (10)
8
9
10
11
12
13
14
15
10
11
14
15
COMMENT
Address 1 has a vector located at WN 7
Address 2 has a vector located at WN 8
Vector for Address 1: Message Words
located at WN = 9 to 11, phase A
If BIWs enabled, then BIW packet sent
If BIWs enabled, then BIW packet sent
Long Address 3 has a vector beginning in
word 10 of phase C
Vector for Address 2: Message Words
located at WN = 12 to 15, phase A
Message information for Address 1
Message information for Address 1
Message information for Address 1
Message information for Address 2
Message information for Address 2
Message information for Address 2
Message information for Address 2
Vector for Long Address 3: Message
Words located at WN = 14 - 15, phase C
Second word of Long Vector is first
message information word of Address 3
Message information for Address 3
Message information for Address 3
The first message is built by relating packets 1, 3, and 8-10. The second message is built by
relating packets 2, 7 and 11 - 14. The third message is built by relating packets 6 and 15 - 18.
Additionally, the host may process block information in packets 4 and 5 for time setting
information.
12.5.3 Building a Fragmented Message
The longest message which will fit into a frame is 84 code words total of message data. Three
alpha characters per word yields a maximum message of 252 characters in a frame assuming no
other traffic. Messages longer than this value must be sent as several fragments.
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