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參數(shù)資料
| 型號： | S5T8701 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | FLEX ROAMING DECODER II |
| 中文描述： | FleX創(chuàng)建漫游解碼器二 |
| 文件頁數(shù)： | 61/70頁 |
| 文件大?。?/td> | 506K |
| 代理商： | S5T8701 |
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S5T8701
FLEX
TM
ROAMING DECODER II
61
OPERATION OF A TEMPORARY ADDRESS
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.
The following describes the sequence of events between the Host and the S5T8701 required to handle a
temporary address:
Following an Address Packet, the host will receive a Vector Packet with
V
2
V
1
V
0
= 001 and
i
2
i
1
i
0
= 000 or 010
(a Short Instruction Vector indicating a temporary address has been assigned to this pager). The system may
send either
i
2
i
1
i
0
= 000 or
i
2
i
1
i
0
= 010 or both when assigning a temporary address. The vector packet with
i
2
i
1
i
0
= 000 will indicate which temporary address is assigned and the frame in which the temporary address is
expected. The vector packet with
i
2
i
1
i
0
=010 will indicate which temporary address is assigned, the MSb of
the expected frame (essentially indicating 64 frames in which to look for the temporary address), and a
message sequence number. When the vector packet with
i
2
i
1
i
0
= 010 is received on a long address, the
specific assign frame is included in the message word sent after the vector
The S5T8701 will increment the corresponding temporary address counter for each temporary address
assignment vector received and begin to decode all of the following frames. Note that this implies a single
dynamic group assignment that is implemented by sending two short instructions ( one for each temporary
address assignment mode of the short instruction vector) will cause the corresponding temporary address
counter to increment twice.
The S5T8701 continues to decode all of the frames and passes any address information, vector information
and message information to the host followed by a status packet indicating the end of each frame and the
current frame number.
There are several scenarios which may occur with temporary addresses
1.
The temporary address is not found in the any of the assigned frames and therefore the host
must terminate the temporary address mode by sending an All Frame Mode Packet to the
S5T8701 with the
"
DTA
"
bit of the particular temporary address set. (if both temporary address
assignment packets were used to assign the temporary address, the
"
DTA
"
bit must be set twice
to disable the temporary address)
2.
The temporary address is found in the frame it was assigned and was not a fragmented message.
Again, the host must terminate the temporary address mode by sending an All Frame Mode
Packet to the S5T8701 with the
"
DTA
"
bit of the particular temporary address set.(if both
temporary address assignment packets were used to assign the temporary address, the
"
DTA
"
bit
must be set twice to disable the temporary address)
相關PDF資料 |
PDF描述 |
|---|---|
| S5T8702 | FEEX ALPHANUMERIC DECODER II |
| S5T8702X01-E0R0 | FEEX ALPHANUMERIC DECODER II |
| S5T8803A01-D0B0 | DIODE ZENER SINGLE 500mW 30Vz 4.2mA-Izt 0.05 0.1uA-Ir 23 SOD-123 3K/REEL |
| S5T8803A01-S0B0 | DIODE ZENER SINGLE 200mW 30Vz 4.2mA-Izt 0.05 0.1uA-Ir 23 SOD-323 3K/REEL |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| S5T8701X01-E0R0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FLEX ROAMING DECODER II |
| S5T8702 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FEEX ALPHANUMERIC DECODER II |
| S5T8702X01-E0R0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:FEEX ALPHANUMERIC DECODER II |
| S5T8803A | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:10 CH PLL |
| S5T8803A01-D0B0 | 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:10 CH PLL |
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