MC68181 Datasheet, PDF (108/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
Receiver Control
Freescale Semiconductor, Inc.
Shut Down
Time 1
Shut Down
Time 2
Receiver
Control
Line Setting
1600 sps or 3200 sps
Sync or Data Setting
Shut Down
Setting 1
Shut Down
Setting 2
Off
Possible
LOBAT
Check
Possible
LOBAT
Check
Possible
LOBAT
Check
Figure C-3 Receiver Shut Down Sequence
AA1238
Miscellaneous Receiver States
In addition to the Warm Up and Shut Down states, the FLEXchip IC has four other
receiver states. When these settings are applied to the receiver control lines, the
FLEXchip IC will be decoding the EXTS1 and EXTS0 input signals. The timing of
these signals and their duration depends on the data the FLEXchip IC decodes. The
four settings are as follows:
• 1600 sps Sync Setting—This setting is applied when the FLEXchip IC is
searching for a 1600 symbols per second signal.
• 3200 sps Sync Setting—This setting is applied when the FLEXchip IC is
searching for a 3200 symbols per second signal.
• 1600 sps Data Setting—This setting is applied after the FLEXchip IC has
found the C or C sync word in a 1600 symbols per second frame.
• 3200 sps Data Setting—This setting is applied after the FLEXchip IC has
found the C or C sync word in a 3200 symbols per second frame.
Figure C-4 below shows some examples of how these settings will be used in the
FLEXchip IC.
C-4
MC68181 Technical Data Sheet
MOTOROLA
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