mc68181 Freescale Semiconductor, Inc, mc68181 Datasheet - Page 94

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

MC68181
Decoder-to-Host Packet Descriptions
B-34
Table B-34 HEX / Binary, Alphanumeric, and Secure Message Vector Packet Bit Assignments
HEX / BINARY, ALPHANUMERIC, AND SECURE MESSAGE VECTOR
Vector Type Identifier (V)
Additional Bit Descriptors
Designator
Byte
WN
3
2
1
0
p
n
b
e
x
Table B-36 Additional Bit Descriptor Definitions for Numeric Vector Packets
Bit 7
This is the Word Number of vector (2–87 decimal) and it describes the location of
the vector word in the frame.
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.
These bits define the phase on which the vector was found (0 = a, 1 = b, 2 = c, 3 = d)
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.
Word number of message starts in the message field. Valid values are 3–87
decimal.
Note:
These are unused bits. The value of these bits is not guaranteed.
n
0
x
e
0
Table B-35 Vector Type Identifier Definition
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.
Bit 6
WN
MC68181 Technical Data Sheet
p
b
V
Freescale Semiconductor, Inc.
x
1
6
2
6
000
101
110
V
For More Information On This Product,
1
V
0
Bit 5
WN
p
n
b
Go to: www.freescale.com
6
5
0
5
Bit 4
WN
n
b
Alphanumeric
x
Hex / Binary
5
4
Definition
4
Secure
Type
Bit 3
WN
n
b
x
4
3
3
Bit 2
WN
V
n
b
2
3
2
2
Bit 1
WN
V
n
b
2
1
1
1
MOTOROLA
Bit 0
WN
V
n
b
1
0
0
0