Hitachi H8/3937 Series Hardware Manual page 390

(WN 12 - 15). The third message is in phase C and has a 2 word long address (WN 5 - 6)
followed by a vector (WN 10) and three message words. Since the third message is sent on a long
address, the first message word (WN 11) begins immediately after the vector. The vector indicates
the location of the second and third message words (WN 14 - 15).
Table 12-30 FLEX SIGNAL
BLOCK Word Number
0 0
1
3
4
5
6
7
1 8
9
10
11
12
13
14
15
Table 12-31 shows the sequence of packets received by the host. The FLEX decoder processes the
FLEX signal one block at a time, and one phase at a time. Thus, the address and vector
information in block 0 phase A is sent to the host in packets 1-3. Then information in block 0
phase C, two block information words and one long address, is sent to the host in packets 4-6.
Packets 7 - 18 correspond to information in block 1, processed in phase A first and phase C
second.
378
PHASE A
BIW1
ADDRESS 1
ADDRESS 2
VECTOR 1
VECTOR 2
MESSAGE 1,1
MESSAGE 1,2
MESSAGE 1,3
MESSAGE 2,1
MESSAGE 2,2
MESSAGE 2,3
MESSAGE 2,4
PHASE C
BIW1
BIW
BIW
LONG ADDRESS 3
WORD 1
LONG ADDRESS 3
WORD 2
VECTOR 3
MESSAGE 3,1
MESSAGE 3,2
MESSAGE 3,3