MC68181 Datasheet, PDF (93/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

Freescale Semiconductor, Inc.
MC68181
Decoder-to-Host Packet Descriptions
Vector Type Identifier (V)
Table B-32 Numeric Vector Definitions
V₂V₁V₀
Name
Description
011
Standard Numeric Format
No special formatting of characters is
specified.
100
Special Format Numeric Vector
Formatting of the received characters is
predetermined by special rules in the
host. See FLEX Message Word
Definitions on page A-7.
111
Numbered Numeric Vector
The received information has been
numbered by the service provider to
indicate all messages have been properly
received.
Additional Bit Descriptors
Table B-33 Additional Bit Descriptor Definitions for Numeric Vector Packets
Designator
Definition
WN
This is the Word Number of vector (2–87 decimal) that describes the location of
the vector word in the frame.
e
This bit is set if more than 2 bit errors are detected in the word, if the check
character calculation fails after error correction has been performed, or if the
vector value is determined to be invalid.
p
These bits define the phase on which the vector was found
(0 = a, 1 = b, 2 = c, 3 = d).
K
These are the beginning check bits of the message.
n
These bits define the number of words in the message including the second
vector word for long addresses (000 = 1 word message, 001 = 2 word message,
etc.). For long addresses, the first message word is located in the word location
that immediately follows the associated vector.
b
These bits define the word number of the message start in the message field (3–87
decimal). For long addresses, the word number indicates the location of the
second message word.
x
These are unused bits. The value of these bits is not guaranteed.
MOTOROLA
MC68181 Technical Data Sheet
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B-33