CMX969D5 MX-COM, Inc., CMX969D5 Datasheet - Page 22

• Manufacturer Part Number: CMX969D5
• Description: MOTIENT/ARDIS RD-LAP MDC4800 Modem
• Manufacturer: MX-COM, Inc.

MOTIENT
4.6.3
¤ ¤ ¤ ¤ 2001 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
SM
Task Timings
t
t
t
t
t
t
t
t
1
2
3
4
1
2
3
4
/ARDIS
Modem Tx output
Data to Data Block Buffer
Task to Command Register
IBEMPTY bit
BFREE bit
Symbols to
RRC filter
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
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
SM
RD-LAP
RD-LAP Transmit Task Timings
MDC Transmit Task Timings
www.mxcom.com Tel: [phone] 744 5050 Fax: [phone]
TM
MDC4800 Modem
Figure 11: Transmit Task Timing Diagram
t
1
1
1
t
2
from task #1
t
t
4
3
2
22
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2
t
from task #2
2
THB/TIB/TLB
THB/TIB/TLB
THB/TIB/TLB
THB/TIB/TLB
THB/TIB/TLB
THB/TIB/TLB
t
t
T24S/TSID
4
3
T24S
T24S
T40B
T40B
T40B
Task
TSID
TSID
Task
3
T4S
T4S
T4S
T8B
T8B
T8B
Any
Any
3
t
from task #3
2
t
4
t
3
CMX969 Advance Information
(symbol times)
(bit times)
1 to 2
Time
Time
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
Doc. # 20480211.002
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