MC68181 Datasheet, PDF (56/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
Freescale Semiconductor, Inc.
FLEX Message Word Definitions
Table A-23 Alpha Character Codes
Standard Rules
No Rules
(Non-Standard Form)
A—Single-phase Subtract 0
U—Single-phase, Phase 0
B—Single-phase Subtract 1
V—Single-phase, Phase 1
C—Single-phase Subtract 2
W—Single-phase, Phase 2
D—Single-phase Subtract 3
X—Single-phase, Phase 3
E—Any-phase, Subtract 0
Y—Any-phase
F—Any-phase Subtract 1
—
G—Any-phase Subtract 2
—
H—Any-phase Subtract 3
—
I—All-phase Subtract 0
Z—All-phase
J—All-phase Subtract 1
—
K—All-phase Subtract 2
—
L—All-phase Subtract 3
—
The following rules apply:
• The character “A” represents a single-phase subscriber unit using the
standard rules for embedding phase and frame. The character “B” is similar to
“A”, except 1 is subtracted from the CAPCODE before applying the standard
rule. Likewise, the characters “C” and “D” indicate that 2 or 3 is to be
subtracted before applying the rule. Using these CAPCODE characters
ensures that sequentially numbered CAPCODEs are assigned to a common
phase and frame. These procedures modify the standard rules and are
intended to simplify the order entry process for multiple address subscriber
units. When addresses are assigned in order, the subtraction of 1, 2, or 3
ensures that the calculation for each additional address in a decoding device
is referenced to the first address. Thus, all A, B, C, and D addresses are
assigned to the same frame and phase.
• Alpha characters “E” through “H” and “I” through “L” represent any-phase
and all-phase subscriber units where the subtract rule is modified to ensure
that all addresses of a multiple address subscriber unit are in the same frame.
• For the cases where no rule is defined, the letters “U” through “X” indicate
single-phase subscriber units assigned to phases 0 through 3 (phases a
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MC68181 Technical Data Sheet
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