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參數資料
| 型號： | PCD5003AH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 尋呼電路 |
| 英文描述： | Enhanced Pager Decoder for 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： | 8/44頁 |
| 文件大小： | 233K |
| 代理商： | PCD5003AH |
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1999 Jan 08
8
Philips Semiconductors
Product specification
Enhanced Pager Decoder for POCSAG
PCD5003A
Table 1
POCSAG recommended call types and function bits
7.3
Error correction
Table 2
Error correction
BIT 20 (MSB)
BIT 21 (LSB)
CALL TYPE
DATA FORMAT
0
0
1
1
0
1
0
1
numeric
alert only 1
alert only 2
alphanumeric
4-bits per digit
7-bits per ASCII character
ITEM
DESCRIPTION
Preamble
Synchronization code-word
Address code-word
Message code-word
4 random errors in 31 bits
2 random errors in 32 bits
2 random errors; plus 4-bit burst errors (optional)
2 random errors; plus 4-bit burst errors (optional)
7.4
Operating states
The PCD5003A has 2 operating states:
ON status
OFF status.
The operating state is determined by a Direct Control input
(DON) and bit D4 in the control register (see Table 3).
Table 3
Truth table for decoder operating status
7.5
ON status
In ON status the decoder pulses the receiver and oscillator
enable outputs (respectively RXE and ROE) according to
the code structure and the synchronization algorithm. Data
received serially at the data input (RDI) is processed for
call receipt. Reception of a valid paging call is signalled to
the microcontroller by means of an interrupt signal.
The received address and message data can then be read
via the I
2
C-bus interface.
DON INPUT
CONTROL
BIT D4
OPERATING
STATUS
0
0
1
1
0
1
0
1
OFF
ON
ON
ON
7.6
OFF status
In OFF status the decoder will neither activate the receiver
or oscillator enable outputs, nor process any data at the
data input. The crystal oscillator remains active to permit
communication with the microcontroller.
In both operating states an accurate timing reference is
available via the REF output. By SPF programming the
signal periodicity may be selected as 32.768 kHz, 50 Hz,
2 Hz or
1
60
Hz.
7.7
Reset
The decoder can be reset by applying a positive pulse on
input pin RST. A power-on reset circuit consisting of an
RC network can be connected to this input as well.
Conditions during and after a reset are described in
Chapter “Operating instructions”.
For successful reset at power-on, a HIGH level must be
present on the RST pin while the device is powering-up.
This can be applied by the microcontroller, or via a suitable
RC power-on reset circuit connected to the RST input.
Reset circuit details and conditions during and after a reset
are described in Chapter 8.
相關PDF資料 |
PDF描述 |
|---|---|
| PCD5003 | Advanced POCSAG Paging Decoder |
| PCD5003H | Advanced POCSAG Paging Decoder |
| PCD5008 | FLEX Pager Decoder |
| PCD5008H | FLEX Pager Decoder |
| PCD5013 | FLEX roaming decoder II |
相關代理商/技術參數 |
參數描述 |
|---|---|
| PCD5003H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced POCSAG Paging Decoder |
| PCD5003HB-T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication Decoder |
| PCD5003U/10 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced POCSAG Paging Decoder |
| PCD5008 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:FLEX Pager Decoder |
| PCD5008H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:FLEX Pager Decoder |
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