CMX969 Consumer Microcircuits Limited, CMX969 Datasheet - Page 24

• Manufacturer Part Number: CMX969
• Description: RD-LAP/MDC4800/Motient/ARDIS4-Level FSK Packet Data Modem
• Manufacturer: Consumer Microcircuits Limited

RD-LAP/MDC4800 Motient/ARDIS
2001 Consumer Microcircuits Limited
t1
t2
t3
t4
t1
t2
t3
t4
RD-LAP Transmit Task Timings
Modem in idle state. Time from writing first
task to application of first transmit bit to Tx
filter
Time from application of first symbol of the
task to the Tx filter until BFREE goes
to a logic '1' (high).
Time to transmit all symbols of the task
Max time allowed from BFREE going to a
logic '1' (high) for next task (and data) to
be written to modem
MDC Transmit Task Timings
Modem in idle state. Time from writing first
task to application of first transmit bit to Tx
filter
Time from application of first symbol of the
task to the Tx filter until BFREE goes
to a logic '1' (high).
Time to transmit all symbols of the task
Max time allowed from BFREE going to a
logic '1' (high) for next task (and data) to
be written to modem
Figure 10 Receive Task Timing Diagram
24
THB/TIB/TLB
THB/TIB/TLB
THB/TIB/TLB
THB/TIB/TLB
THB/TIB/TLB
THB/TIB/TLB
T24S/TSID
T24S
T24S
T40B
T40B
T40B
Task
TSID
TSID
Task
T4S
T4S
T4S
T8B
T8B
T8B
Any
Any
(symbol times)
(bit times)
1 to 2
0 to 1
Time
Time
112
110
0.5
0.5
0.5
16
24
69
18
17
52
40
38
5
6
0
4
3
8
6
CMX969
D/969/5