8.4.5 Interface and Control

The host (DSP, Microcontroller, FPGA, etc) configures and monitors the CDCM6208 through the SPI or I²C port. The host reads and writes to a collection of control/status bits called the register file. Typically, a hardware block is controlled and monitored via a specific grouping of bits located within the register file. The host controls and monitors certain device-wide critical parameters directly, through control/status pins. In the absence of a host, the CDCM6208 can be configured to operate in pin mode where the control pins [PIN0-PIN4] can be set appropriately to generate the necessary clock outputs out of the device.

Figure 38. CDCM6208 Interface and Control Block

Within this register space, there are certain bits that have read/write access. Other bits are read-only (an attempt to write to a read only bit will not change the state of the bit).