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參數(shù)資料
| 型號： | 935262056518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 尋呼電路 |
| 英文描述： | 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)： | 30/76頁 |
| 文件大?。?/td> | 301K |
| 代理商： | 935262056518 |
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1999 Apr 12
36
Philips Semiconductors
Product specication
FLEX
roaming decoder II
PCD5013
8.6.4
ADDRESS CALCULATION
Address codeword values generally do not coincide with
(part of) the user address as specified in the CAPCODE.
To find the address codewords corresponding to a user
address a conversion has to be done (Table 31). The type
of conversion depends on the CAPCODE range in which
the user address is located. Note that addresses are
transmitted LSB first (differently to POCSAG).
Short addresses, are transmitted in a single address
codeword where as long addresses are transmitted in two
consecutive address codewords. The first codeword of a
long address contains the lower part of the address, the
second codeword the upper part. By combining two long
address codewords from different banks 6 long address
ranges are created: 1 to 2, 1 to 3, 1 to 4, 2 to 3, 2 to 4 and
3 to 4. Ranges 2 to 4 and 3 to 4 are as yet undefined and
reserved.
Table 31 describes how to calculate the 21-bit address
codeword which is transmitted over the air.
Table 30 Address word range denitions
TYPE
HEX VALUE
Idle word (illegal address)
000000
Long address 1
000001 to 008000
Short address
008001 to 1E0000
Long address 3
1E0001 to 1E8000
Long address 4
1E8001 to 1F0000
Short address (reserved)
1F0001 to 1F27FF
Information service address
1F2800 to 1F67FF
Network address
1F6800 to 1F77FF
Temporary address
1F7800 to 1F780F
Operator messaging address 1F7810 to 1F781F
Short address (reserved)
1F7820 to 1F7FFE
Long address 2
1F7FFF to 1FFFFE
Idle word (illegal address)
1FFFFF
Table 31 Address word calculation
Notes
1. All numbers are in hexadecimal format.
2. The MOD operator gives the remainder of an integer division.
3. CAPCODE refers to the value of the address field in a FLEX
CAPCODE.
4. The DIV operator is the integer division.
5. A short address consists of a single codeword.
6. The upper codeword range in bank 2 is used from the highest address downwards, i.e. the lowest value of the
CAPCODE produces a codeword value of 1FFFFEH.
TYPE
LOWER ADDRESS CODEWORD;
notes 1, 2 and 3
UPPER ADDRESS CODEWORD;
notes 1, 3 and 4
Short address
CAPCODE + 8000
note 5
Long address,
range 1 to 2; note 6
1 + ((CAPCODE
1F9001) MOD 8000)
1FFFFF
((CAPCODE 1F9001) DIV 8000)
Long address,
ranges 1 to 3 and
1to4
1 + ((CAPCODE
1F9001) MOD 8000)
1D8000 + ((CAPCODE
1F9001) DIV 8000)
Long address,
range 2 to 3
1F7FFF + ((CAPCODE
1F8FFF) MOD 8000) 1C8000 + ((CAPCODE 1F8FFF) DIV 8000)
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