Texas Instruments CDCM7005 manual Board View and Connector Location, Hardware Configuration

Board View and Connector Location

3.1Board View and Connector Location

Figure 3−1. Board View

3.2 Hardware Configuration

This section describes the board configuration using on-board jumpers and solder bridges.

3.2.1Power Supply (P1, P2)

-Supply 3.3 V ±10% on P1 and P2 using a stabilized external power supply.

J WARNING: Never supply more than 3.6 V on P1.

3.2.2Onboard Switches and Indicators (SW1−SW2, D1−D4)

-Push SW1 to enter the power-down mode of the CDCM7005 device. Then all current sources are switched off, all outputs are switched into 3-state, and all dividers (M, N, and P) are reset to default.

-Push SW2 to enter the reset mode of the device. The charge pump (CP) is switched to 3-state and all counters (N, M, P) are rest to zero (the initial divider settings are maintained in SPI.

-The three status outputs of the CDCM7005 are fed to LED indicators. D1 on indicates a valid reference input clock signal. D2 is on if the VC(X)O input clock is valid and D3 turns on if the PLL has been locked.

-D4 indicates power supply

Note:

In case of a low input impedance of the VC(X)O control voltage input, there is a possibility D3 may not turn on to indicate locking.

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