MC68181 Datasheet, PDF (54/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
Freescale Semiconductor, Inc.
FLEX Message Word Definitions
CAPCODE TYPE
Example CAPCODEs are shown in Table A-22. The CAPCODE type can be any of
“A” through “L” or “U” through “Z”. The CAPCODE types “A” through “L”
indicate that the standard rules are used to derive the assigned frame and phase
information from the address field. (See Standard Frame and Phase Embedding
Rules on page A-27.) For these CAPCODE types, the battery cycle (indicated as a “b”
in Example 1) is indicated by a single decimal digit “0” through “7” preceding the
CAPCODE type. When the FLEX standard battery cycle of 4 (16-frame cycle) is used,
the battery cycle digit is not required (see Example 2 in Table A-22).
The CAPCODE types “U” through “Z” indicate that the standard frame and phase
embedding rules were not used and additional information is required. The phase
assignment can be derived from the CAPCODE type, as described in Table A-23 on
page A-28. The 3-digit decimal frame assignment “000” through “127” (indicated by
“fff” in example 3) and single digit decimal battery cycle “0” through “7” (indicated as
a “b” in Example 3 in Table A-22) may precede this CAPCODE type. The frame and
battery cycle fields are not required. When they are not included (see Example 4 in
Table A-22), the paging device or the subscriber database must be accessed to
determine the assigned frame and battery cycle.
The extended CAPCODE is a regular CAPCODE with a 10-digit address field and
preceded by an extra alphabetic character “P” through “S”. These CAPCODEs are
used to provide additional information required for roaming devices.
Table A-22 FLEX CAPCODE Examples
Example
Short
Long
Extended
1
bA1234567
bA123456789
RbA1234567890
2
A1234567
A123456789
RA1234567890
3
fffbU1234567
fffbU123456789
RfffbU1234567890
4
U1234567
U123456789
RU1234567890
By using the convention of 7 digits to represent short addresses, 9 digits to represent
some of the long addresses in set 1–2, and 10 digits to represent the balance of long
addresses, it is possible to differentiate between the different types of addresses. The
range of the decimal address field consists of the numbers 1 through 5,370,810,366
where short and other single code word addresses fall below 2,031,615 and Long
addresses are above 2,101,248. The goal in displaying a CAPCODE is to use the
shortest form possible. Even though the non-standard form could represent a
standard assignment, the standard form is chosen to indicate that it is a standard
assignment. All CAPCODE forms, except Example 4 in Table A-22, contain the
information required to send a message to a subscriber unit.
A-26
MC68181 Technical Data Sheet
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