CS22250 Datasheet, PDF (16/32 Pages) Cirrus Logic – WIRELESS 10BT CONTROLLER

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
XTALOUT
44 MHz Reference clock input/crystal clock input.
Reference crystal clock output.
Input
Output
XTRACLK
PLLAGND
PLLAVCC
PLLDGND
PLLDVCC
PLLPLUS
Input
Second clock input to clock module. Use depending on clock module
configuration setting. Refer to the clock section for more information.
Input
Analog PLL ground.
Input
Analog PLL power. 3.3V input.
Input
Digital PLL ground.
Input
Digital PLL power. This is 1.8V input.
Input
Analog PLL ground.
Ethernet Interface
ETXCLK
ETXDOOutput
Input
Transmit clock. A 10 MHz clock input. This clock signal provides the
reference sampling point for transmit data.
Transmit data. This output signal is NRZ formatted and is transmitted to
the Ethernet PHY layer.
CS22250 Wireless 10BT Controller
16 of 32
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DS551PP2 Rev. 3.0