CS22250 Wireless 10BT Controller

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DS551PP2

Rev. 3.0

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PLL and Clock Interface

There are three clock pins and five PLL power pins for a total of 8 signals in this interface.

XTAL_CLKIN

Input

44 MHz Reference clock input/crystal clock input.

XTALOUT

Output

Reference crystal clock output.

XTRACLK

Input

Second clock input to clock module. Use depending on clock module

configuration setting. Refer to the clock section for more information.

PLLAGND

Input

Analog PLL ground.

PLLAVCC

Input

Analog PLL power. 3.3V input.

PLLDGND

Input

Digital PLL ground.

PLLDVCC

Input

Digital PLL power. This is 1.8V input.

PLLPLUS

Input

Analog PLL ground.

Ethernet Interface

ETXCLK

Input

Transmit clock. A 10 MHz clock input. This clock signal provides the

reference sampling point for transmit data.

ETXDOOutput

Transmit data. This output signal is NRZ formatted and is transmitted to

the Ethernet PHY layer.