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參數(shù)資料
| 型號： | PCD5002AH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 尋呼電路 |
| 英文描述： | Enhanced Pager Decoder for APOC1/POCSAG |
| 中文描述： | TELECOM, PAGING DECODER, PQFP32 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, SOT-358-1, LQFP-32 |
| 文件頁數(shù)： | 13/48頁 |
| 文件大?。?/td> | 252K |
| 代理商： | PCD5002AH |
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1999 Jan 08
13
Philips Semiconductors
Product specification
Enhanced Pager Decoder for
APOC1/POCSAG
PCD5002A
Detection of preamble will cause the device to switch to the
‘preamble receive’ mode, while sync word detection will
cause the device to switch to the ‘batch zero detect’ mode.
When neither is detected during the 2 code-word window
or any following 32-bit group, the receiver will be disabled.
If valid code-words are detected but no sync word or
preamble is detected over a period of 18 code-words, the
receiver is also disabled.
Data sampling, as previously described, is repeated one
cycle duration after the moment the receiver was last
activated.
8.15
Call termination
Call reception is terminated:
Upon reception of any address code-word (including idle
code-word but excluding the batch zero identifier in
APOC1 operation) requiring no more than single bit
error correction
Upon reception of a correctable address code-word
(error type other than ‘111’; see Table 11) that matches
an enabled RIC
When a forced call termination command is received
from an external controller.
In ‘data fail’ mode, when a sync word is not detected at
the expected batch position.
The last method permits an external controller to stop call
reception, depending on the number and type of errors
which occurred in a call. After a forced call termination the
decoder will enter the ‘data fail’ mode.
The type of error correction as well as the call termination
conditions are indicated by status bits in the message data
output.
In the event of the terminating code-word matching an
enabled RIC, a concatenated call will be started with the
call header replacing the terminator of the previous call.
Following call termination, transfer of the data received
since the previous sync word period is initiated by an
interrupt to the external controller.
8.16
Enhanced call termination
The PCD5002A provides an enhanced mode of call
termination which is enabled by setting SPF byte 3, bit D7.
When enabled, the following call termination conditions
applies, in addition to those listed in Section 8.15.
Reception of two consecutive code-words (excluding
sync word), each of which are either uncorrectable or an
address code-word with more than one bit in error.
8.17
Call data output format
POCSAG call information is stored in the decoder SRAM
in blocks of 3 bytes per code-word. Each stored call
consists of a call header, followed by message data blocks
and a call terminator. In the event of concatenated
messages the call terminator is replaced with the call
header of the next message. An alert-only call only has a
call header and a call terminator.
The formats of a call header, a message data block and a
call terminator are shown in Tables 5, 7 and 9.
A
Call Header
contains information on the last sync word
received, the RIC which began call reception and the type
of error correction performed on the address code-word.
A
Message Data
block contains the data bits from a
message code-word plus the type of error correction
performed. No deformatting is performed on the data bits:
numeric data appear as 4-bit groups per digit,
alphanumeric data has a 7-bit ASCII representation.
The
Call Terminator
contains information on the last sync
word received, information on the way the call was
terminated (forced call termination command, loss of sync
word in ‘data fail’ mode) and the type of error correction
performed on the terminating code-word.
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PDF描述 |
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| PCD5002HBD-S | Telecommunication Decoder |
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| PCD5003HB-T | Telecommunication Decoder |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCD5002H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced POCSAG and APOC-1 Paging Decoder |
| PCD5002HBD-S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication Decoder |
| PCD5002HBD-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication Decoder |
| PCD5002U/10 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced POCSAG and APOC-1 Paging Decoder |
| PCD5003 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced POCSAG Paging Decoder |
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