MC68181 Datasheet, PDF (94/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
Freescale Semiconductor, Inc.
Decoder-to-Host Packet Descriptions
HEX / BINARY, ALPHANUMERIC, AND SECURE MESSAGE VECTOR
Table B-34 HEX / Binary, Alphanumeric, and Secure Message Vector Packet Bit Assignments
Byte
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
3
0
WN₆
WN₅
WN₄
WN₃
WN₂
WN₁
WN₀
2
e
p₁
p₀
x
x
V₂
V₁
V₀
1
x
x
n₆
n₅
n₄
n₃
n₂
n₁
0
n₀
b₆
b₅
b₄
b₃
b₂
b₁
b₀
Vector Type Identifier (V)
Table B-35 Vector Type Identifier Definition
V₂V₁V₀
Type
000
Secure
101
Alphanumeric
110
Hex / Binary
Additional Bit Descriptors
Table B-36 Additional Bit Descriptor Definitions for Numeric Vector Packets
Designator
Definition
WN
This is the Word Number of vector (2–87 decimal) and it 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)
n
These bits define the number of message words in this frame including the first
Message word that immediately follows a long address vector. Valid values are 1–
85 decimal.
b
Word number of message starts in the message field. Valid values are 3–87
decimal.
Note: For long addresses, the first Message Packet is sent from the word location
immediately following the word location of the Vector Packet. The b bits indicate
the second message word in the message field if one exists.
x
These are unused bits. The value of these bits is not guaranteed.
B-34
MC68181 Technical Data Sheet
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