MC68181 Datasheet, PDF (32/119 Pages) Freescale Semiconductor, Inc – Advance Information ROAMING FLEX chip SIGNAL PROCESSOR

MC68181
FLEX Frame Structure
Freescale Semiconductor, Inc.
The 3200 bps rate is transmitted as two concurrent phases of information (A and C),
as shown in Figure A-3, at either:
• 1600 symbols per second using 4-level FSK modulation, or
• 3200 symbols per second using 2-level FSK modulation.
One Cycle = 4 Minutes
Frame Frame Frame Frame Frame Frame
127
0
1
2
3
4
Frame Frame Frame
125 126 127
One Frame = 1.875 s.
Sync 1 ^Frame Sync 2
Info
Block 0
Word Number
0 to 7
One Block =
160 ms
Block 9
Word Number
72 to 79
Block 10
Word Number
80 to 87
PHASE A
PHASE C
BIW
BIW
Address
Field
Address
Field
Vector
Field
Message Field _{Idle Field}
Vector
Field
Message Field Idle Field
AA1228
Figure A-3 FLEX™ Signal Structure for 3200 BPS
A-4
MC68181 Technical Data Sheet
MOTOROLA
For More Information On This Product,
Go to: www.freescale.com