HD6433937 Datasheet, PDF (394/521 Pages) Hitachi Semiconductor – Hardware Manual

Table 12-33 Alphanumeric Message with fragmentation
PACKET
All Frame
PACKET TYPE PHASE Counter COMMENT
1st
ADDRESS 1
A
0
Address 1 is received
2nd
VECTOR 1
A
1
Vector = Alphanumeric Type
3rd
MESSAGE
A
1
Message Word received “C” bit = 1,
Message is fragmented, more expected
4th
STATUS
1
End of Frame Indication (EOF = 1)
5th
ADDRESS 1
B
1
Address 1 is received
6th
VECTOR 1
B
2
Vector = Alphanumeric Type
7th
MESSAGE
B
2
Message Word received “C” bit = 1,
Message is fragmented, more expected.
8th
Variable*
1
Host writes All Frame Mode Packet to the
FLEX decoder with the “DAF” bit = 1
9th
STATUS
1
End of Frame Indication (EOF = 1)
10th
ADDRESS 1
A
1
Address 1 is received
11th
VECTOR 1
A
2
Vector = Alphanumeric type
12th
MESSAGE
A
2
Message Word received “C” bit = 0, No
more fragments are expected.
13th
Variable*
1
Host writes All Frame Mode Packet to the
FLEX decoder with the “DAF” bit = 1
14th
Variable*
0
Host writes All Frame Mode Packet to the
FLEX decoder with the “DAF” bit = 1
Note: * Host Initiated Packet. The FLEX decoder returns a packet according to 12.4, Decoder-
to-Host Packet Descriptions.
12.5.4 Operation of a Temporary Address
1. Group Messaging
The FLEX protocol allows for a dynamic group call for the purpose of sending a common
message to a group of paging devices. The dynamic group call approach assigns a “Temporary
Address” using the personal address and the short instruction vector.
The FLEX protocol specifies sixteen addresses for the dynamic group call which may be
temporarily activated in a future frame (If the frame or one of the frames designated is equal to the
present frame the host is to interpret this as the next occurrence of this frame 4 minutes in the
future.) The temporary address is valid for one message starting in the specified frame(s) and
remaining valid throughout the following frames to the completion of the message. If the message
is not found in the specified frame(s) the host must disable the assigned temporary address.
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