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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)： | 58/70頁 |
| 文件大?。?/td> | 506K |
| 代理商： | S5T8701 |
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FLEX
TM
ROAMING DECODER II
S5T8701
58
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.
Additional fragments can be expected when the
"
continue bit" in the 1
st
Message Word is set. This causes the
pager to examine every following frame for an additional fragment until the last fragment with the continue bit
reset is found. The only requirement relating to the placement in time of the remaining fragments is that no more
than 32 frames (1 minute) or 128 frames (4 minutes) as indicated by the service provider may pass between
fragment receptions.
Each fragment contains a check sum character to detect errors in the fragment, a fragment number 0, 1, or 2 to
detect missing fragments, a message number to identify which message the fragment is a part, and the continue
bit which either indicates that more fragments are in queue or that the last fragment has been received.
The following describes the sequence of events between the Host and the S5T8701 required to handle a
fragmented message:
The host will receive a vector indicating one of the following types:
V
2
V
1
V
0
0 0 0
1 0 1
1 1 0
Type
Secure
Alphanumeric
Hex / Binary
The S5T8701 will increment the all frame mode counter inside the S5T8701 and begin to decode all of the
following frames.
The host will receive the Message Packet(s) contained within that frame followed by a Status Packet. The
host must decide based on the Message Packet to return to normal decoding operation. If the message is
indicated as fragmented by the Message Continued Flag
"
C
"
being set in the Message Packet then the host
does not decrement the all frame mode counter at this time. The host decrements the counter if the Message
Continued Flag
"
C
"
is clear by writing the All Frame Mode Packet to the S5T8701 with the
"
DAF
" bit = 1. If
no other fragments, temporary addresses are pending and the
FAF
bit is clear in the All Frame Mode
Register, then the S5T8701 returns to normal operation.
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 the frame. If the
message is indicated as fragmented by the Message Continued Flag
"
C"
in the Message Packet then the
host remains in the receive mode expecting more information from the S5T8701.
After the host receives the second and subsequent fragment with the Message Continued Flag
"
C
" = 1, it
should decrement the all frame mode counter by sending an All Frame Mode Packet to the S5T8701 with the
"
DAF
" bit = 1. Alternatively, the host may choose to decrement the counter at the end of the entire message
by decrementing the counter once for each fragment received.
相關(guān)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 |
| S5T8803A | 10 CH PLL |
相關(guān)代理商/技術(shù)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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