mc68181 Freescale Semiconductor, Inc, mc68181 Datasheet - Page 56

• Manufacturer Part Number: mc68181
• Description: Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

MC68181
FLEX Message Word Definitions
A-28
The following rules apply:
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A—Single-phase Subtract 0
B—Single-phase Subtract 1
C—Single-phase Subtract 2
D—Single-phase Subtract 3
E—Any-phase, Subtract 0
F—Any-phase Subtract 1
G—Any-phase Subtract 2
H—Any-phase Subtract 3
I—All-phase Subtract 0
J—All-phase Subtract 1
K—All-phase Subtract 2
L—All-phase Subtract 3
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
Standard Rules
MC68181 Technical Data Sheet
Freescale Semiconductor, Inc.
Table A-23 Alpha Character Codes
For More Information On This Product,
Go to: www.freescale.com
U—Single-phase, Phase 0
V—Single-phase, Phase 1
W—Single-phase, Phase 2
X—Single-phase, Phase 3
Y—Any-phase
Z—All-phase
(Non-Standard Form)
No Rules
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