TDMA Digital Radio Processor
CMX7161
5
External Components
System Clock Interface
5.1
19.2 MHz
OSCILLATOR
SYSCLKIN
50
Figure 4 Recommended External Components – System Clock Interface
The system clock circuit is designed to operate with an external oscillator at 19.2 MHz. The external
oscillator should be connected to the SYSCLKIN input pin, refer to Figure 3 and Figure 4. For external
oscillator frequency range, see Section 8.1, Electrical Performance, Operating Limits. Also refer to Section
7.1.
5.2
C-BUS Interface
R2
Figure 5 Recommended External Components – C-BUS Interface
10k - 100k
Note:
If the IRQN line is connected to other compatible pull-down devices only one pull-up resistor is required on
the IRQN node.
5.3 2-point Output Reconstruction Filter
The CMX7161 2-point outputs provide internal reconstruction. To complete the output reconstruction filter
the following external RC network (Figure 6) should be used for each of the outputs.
2013 CML Microsystems Plc
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