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| 型號： | PCD5013 |
| 廠商： | NXP Semiconductors N.V. |
| 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)： | 49/76頁 |
| 文件大?。?/td> | 270K |
| 代理商： | PCD5013 |
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1999 Apr 12
49
Philips Semiconductors
Product specification
FLEX
roaming decoder II
PCD5013
8.7.8.4
Hex/binary message
FLEX
hexadecimal/binary messages may be encoded
using any word size (blocking length) in the
range 1 to 16 bits. Words are placed in codewords along
with additional information about the message as
described in Tables 55 and 56 and these definitions.
The message data in Tables 55 and 56 have blocking
lengths of 4 bits; words are designated lower case letters
a, b, c, d etc.
Hexadecimal/binary messages can be sent as fragments.
See Section 8.8.6 for a description of message
fragmentation. Messages and message fragments are
terminated, or interrupted in the case of a non-terminating
fragment, on the last full character boundary in the last
codeword. Unused bits are cleared if the last valid data bit
is logic 1, or set if the last valid data bit is logic 0. If the
terminating fragment exactly fills its last codeword, an
additional codeword is sent to indicate the location of the
last character. This codeword is filled with logic 0s if the
last valid data bit is logic 1 and filled with logic 1s if the last
valid data bit is logic 0.
Fields K to N make up the first word of a message and the
first word of every fragment in a long message.
K:
12-bit fragment checksum (Tables 55 and 56).
See Section 8.8.7 for a description of message
checksums.
C:
1-bit message continued flag (Tables 55 and 56).
When this bit is set, fragments of this message are to be
expected in following frames. See Section 8.8.6 for a
description of message fragmentation.
F:
2-bit message fragment number (Tables 55 and 56).
This is a modulo 3 message fragment number which is
incremented by 1 in successive message fragments.
See Section 8.8.6 for a description of message
fragmentation.
N:
message number (Tables 55 and 56).
See Section 8.8.8 for a description of message
numbering.
H:
1-bit header message flag (Table 55). It is a header
message only when this bit is set, otherwise it is a data
message. A header message is a displayable tag
associated with a non-displayable data message.
The header message (which is sent first) and the data
message, both have the same message number.
The second codeword of the first fragment of a hex/binary
message contains fields R to S. These fields are only
transmitted in the first fragment of a message.
R:
message retrieval flag (Table 55). When this bit is set,
the pager expects this message to be numbered.
See Section 8.8.8 for a description of message
numbering.
s:
5-bit field reserved for future use (Table 55).
Default value = 00000.
M:
1-bit mail drop flag, see Table 55. When this bit is set,
the message is to be stored in a special area in memory to
overwrite existing data in the same memory space.
D:
1-bit display direction field (Table 55). D = 0 display left
to right, D = 1 display right to left (valid only when data sent
as characters i.e. blocking length not equal 0001).
B:
4-bit blocking length (Table 55). Indicates bits per
character. B
3
B
2
B
1
B
0
= 0001 = 1-bit per character
(binary/transparent data), 1111 = 15 bits per character,
0000 = 16 bits per character. Data with a blocking length
other than 1 is assumed to be displayed on a character by
character basis (default value = 0001). Note: Tables 55
and 56 show B = 4-bit blocking length.
S:
8-bit signature field (Table 55). The 1’s complement of
the binary sum, taken 8 bits at a time, over the total
message prior to formatting into fragments. The first 8 bits
following the signature field are summed with the following
8 bits, b
3
b
2
b
1
b
0
a
3
a
2
a
1
a
0
+ d
3
d
2
d
1
d
0
c
3
c
2
c
1
c
0
, etc.
continuing to the last valid data bit in the last word of the
last fragment (the sum does not include termination bits).
The 8 LSBs of the result are inverted (1’s complement)
and transmitted as the message signature.
8.7.8.5
Secure message
FLEX
secure messages are encoded using the 7-bit
FLEX
alphanumeric character set (Section 8.7.8.3).
These characters are placed in codewords along with
additional information about the message as described in
Table 57 and the following definitions. In Table 57, 7-bit
characters of the message are designated lower case
letters a, b, c, d etc.
Secure messages follow the same fragmentation and
termination rules as alphanumeric messages
(Section 8.7.8.3).
K:
10-bit fragment checksum (Table 57).
See Section 8.8.7 for a description of message
checksums.
C:
1-bit message continued flag (Table 57). When this bit
is set, fragments of this message are to be expected in
following frames. See Section 8.8.6 for a description of
message fragmentation.
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PDF描述 |
|---|---|
| PCD5013H | FLEX roaming decoder II |
| PCD5032 | ADPCM CODEC for digital cordless telephones |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PCD5013H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:FLEX roaming decoder II |
| PCD5032 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ADPCM CODEC for digital cordless telephones |
| PCD5032B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Linear CODEC |
| PCD5032D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Linear CODEC |
| PCD5032H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ADPCM CODEC for digital cordless telephones |
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