CS22210 datasheet(15/31 Pages) CIRRUS

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CS22210 PCI/USB Wireless Controller

15 of 31

D556PP2

Rev. 3.0

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PLL and Clock Interface

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

XTAL_CLKIN

Input

44 MHz reference clock input/crystal clock input for PCI and 48 MHz for

USB.

XTALOUT

Output

Reference crystal clock output.

XTRACLK

Input

Second clock input to clock module. This input allows independent control

for mem_clk and ctl_clk. The usage of this clock input is determined by the

clk module configuration, which is determined by the three strapping input

pin values.

PLLAGND

Input

Analog PLL ground.

PLLAVCC

Input

Analog PLL power. 3.3V input.

PLLDGND

Input

Digital PLL ground.

PLLDVCC

Input

Digital PLL power. 1.8V input.

PLLPLUS

Input

Analog PLL ground.

PCI Interface

The PCI interface is a standard 2.2 compliant interface. There are a total of 51 signals.

AD[31:0]

Bi-directional

PCI address/data. This bus contains a physical address during the first

clock of a PCI transfer and data during subsequent clocks. The signals

are inputs during the address and write data phases of a transaction, or

outputs during the read data phase of a transaction.

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