CDCE72010 datasheet(35/70 Pages) TI

35 / 70 page

CONFIGURATION DEFAULT MODE

EEPROM

PLL_LOCK

REF_SEL

POWERDOWN

RESET

HOLD

MODE_SEL

AUX_SEL

SPI_MISO

SPI_LE(CD1)

SPI_CLK(CD2)

SPI_MOSI(CD3)

Interface

&Control

RAMResistors

PLL_LOCK

REF_SEL

POWERDOWN

RESET

HOLD

MODE_SEL

AUX_SEL

CD1

CD2

CD3

EEPROM

Interface

&Control

RAMResistors

CDCE72010

www.ti.com...................................................................................................................................................................................................... SCAS858 – JUNE 2008

The CDCE72010 has two modes of operation, SPI Interface and Configuration Default Mode. The Configuration

Default mode is selected when MODE_SELECT Pin is driven low and it is used where SPI interface is not

available. In the CD Mode configuration, the SPI interface Pins become static control pins CD1, CD2, CD3 and

AUX_SEL as shown in the Pin description. The CD Mode signals are sampled only at power up or after Power

Down are asserted.

In CD Mode BYPASS, CD1 and CD2 are used to switch between EEPROM saved configurations. -CD1 allows

swapping Divider and Phase Adjust value between output couples.

• CD2 allows changing the output type for each output.

• AUX_SEL Controls the Output Mux between VCXO and AUX Input.

• CD3 must be grounded in CD Mode.

Without any interface a single device with a single program can have multiple configurations that can be

implemented on more than one socket.

Figure 13. Writing to EEPROM via SPI Bus in

Figure 14. Using CD1, CD2 to Control What is Copied

Manufacutring,

From EEPROM Into RAM Registers at Power Up

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