MC68181 Datasheet, PDF (74/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
Freescale Semiconductor, Inc.
Host-to-Decoder Packet Descriptions
DECREMENT ALL FRAME (DAF) COUNTER
Setting this bit decrements the All Frame mode counter by one. If a packet is sent with
this bit clear, the All Frame mode counter is not affected. The value after reset = 0.
FORCE ALL FRAME (FAF) MODE
Setting this bit forces the FLEX chip IC to enter All Frame mode. If this bit is clear, the
FLEX chip IC may or may not be in All Frame mode depending on the status of the
All Frame mode counter and the temporary address enable counters. This may be
useful in acquiring transmitted time information. The value after reset = 0.
DECREMENT TEMPORARY ADDRESS (DTA) ENABLE COUNTER
When a bit in this word is set, the corresponding temporary address enable counter is
decremented by 1. When a bit is cleared, the corresponding temporary address
enable counter is not affected. When a temporary address enable counter reaches 0,
the temporary address is disabled.The value after reset = 0.
Operator Messaging Address Enable Packet
The operator messaging address enable packet is used to enable and disable the built-
in FLEX operator messaging addresses. Enabling and disabling operator messaging
addresses does not affect what frames the decoder IC decodes. To decode the proper
frames, the host must modify the FF bits in the Control Packet or the AF bits in the
Frame Assignment Packets. The ID of the operator messaging address enable packet
is 4.
Byte
3
2
1
0
Table 2-10 System Address Enable Packet Bit Assignments
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
OAE₁₅
OAE₇
OAE₁₄
OAE₆
OAE₁₃
OAE₅
OAE₁₂
OAE₄
OAE₁₁
OAE₃
OAE₁₀
OAE₂
OAE₉
OAE₁
Bit 0
0
0
OAE₈
OAE₀
OPERATOR MESSAGING ADDRESS ENABLE (OAE)
When a bit is set, the corresponding operator messaging address is enabled. When it
is cleared, the corresponding operator messaging address is disabled. OAE₀ through
OAE₁₅ corresponds to the operator messaging address values of $1F7810 through
$1F781F respectively. The value after reset = 0.
B-14
MC68181 Technical Data Sheet
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