CS2000-CP_15 Datasheet, PDF (5/37 Pages) Cirrus Logic – Fractional-N Clock Synthesizer & Clock Multiplier

1. PIN DESCRIPTION
CS2000-CP
VD
1
GND
2
CLK_OUT
3
AUX_OUT
4
CLK_IN
5
10
SDA/CDIN
9
SCL/CCLK
8
AD0/CS
7
XTI/REF_CLK
6
XTO
Pin Name
VD
GND
CLK_OUT
AUX_OUT
CLK_IN
XTO
XTI/REF_CLK
AD0/CS
SCL/CCLK
SDA/CDIN
# Pin Description
1 Digital Power (Input) - Positive power supply for the digital and analog sections.
2 Ground (Input) - Ground reference.
3 PLL Clock Output (Output) - PLL clock output.
4 Auxiliary Output (Output) - This pin outputs a buffered version of one of the input or output clocks,
or a status signal, depending on register configuration.
5 Frequency Reference Clock Input (Input) - Clock input for the Digital PLL frequency reference.
6 Crystal Connections (XTI/XTO) / Timing Reference Clock Input (REF_CLK) (Input/Output) -
7 XTI/XTO are I/O pins for an external crystal which may be used to generate the low-jitter PLL input
clock. REF_CLK is an input for an externally generated low-jitter reference clock.
8 Address Bit 0 (I²C) / Control Port Chip Select (SPI) (Input) - AD0 is a chip address pin in I²C
Mode. CS is the chip select signal in SPI Mode.
9 Control Port Clock (Input) - SCL/CCLK is the serial clock for the serial control port in I²C and SPI
mode.
10 Serial Control Data (Input/Output) - SDA is the data I/O line in I²C Mode. CDIN is the input data
line for the control port interface in SPI Mode.
DS761F3
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