1200/2400/4800 Baud FFSK/MSK Modem
CMX469A
1.6
Application Notes
Rx Enable
The control of the relevant outputs with reference to the Rx Enable input is described below:
Rx Enable
‘1’
‘0’
Rx Function
Enabled
Powersave
Clock Data O/P
Enabled
‘0’
Carrier Detect O/P
Enabled
‘1’ or ‘0’
Rx Sync Out
Enabled
‘1’ or ‘0’
After enabling the Receiver, a time of at least 8 bit periods plus 2ms should be allowed for the Carrier Detect
circuit to stabilise and give a valid output.
Operational Data Rate Configurations
Operational Data Rate Configurations are as described below:
Xtal/Clock
Frequency
Clock Rate
1200/2400
Select
4800 Select
Baud Rate
‘0’
‘1’
‘0’
1200
1.008MHz
‘0’
‘0’
‘0’
2400
‘1’
‘1’
‘0’
1200
4.032MHz
‘1’
‘0’
‘0’
2400
‘1’
‘0’
‘1’
4800
Test Set Up
Figure 3 Suggested CMX469A Test Set-Up
©
2001 Consumer Microcircuits Limited
9
D/469A/2
CMLMICRO [ CML MICROCIRCUITS ]
