CS2000-CP
1. PIN DESCRIPTION
SDA/CDIN
SCL/CCLK
AD0/CS
VD
10
9
1
2
3
4
5
GND
8
CLK_OUT
AUX_OUT
CLK_IN
XTI/REF_CLK
XTO
7
6
Pin Name
VD
#
1
2
3
4
Pin Description
Digital Power (Input) - Positive power supply for the digital and analog sections.
Ground (Input) - Ground reference.
GND
CLK_OUT
PLL Clock Output (Output) - PLL clock output.
Auxiliary Output (Output) - This pin outputs a buffered version of one of the input or output clocks,
or a status signal, depending on configuration.
AUX_OUT
CLK_IN
5
Frequency Reference Clock Input (Input) - Clock input for the Digital PLL frequency reference.
6
7
Crystal Connections (XTI/XTO) / Timing Reference Clock Input (REF_CLK)
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.
XTO
XTI/REF_CLK
8
9
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.
AD0/CS
Control Port Clock (Input) - SCL/CCLK is the serial clock for the serial control port in I²C and SPI
mode.
SCL/CCLK
SDA/CDIN
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.
4
DS761A2
CIRRUS [ CIRRUS LOGIC ]
