CY7C2568XV18, CY7C2570XV18

Document Number: 001-70206 Rev. *B

Page 6 of 29

DOFF

Input

PLL Turn Off

 Active LOW. Connecting this pin to ground turns off the PLL inside the device. The

timing in the PLL turned off operation differs from those listed in this data sheet. For normal operation,

this pin can be connected to a pull up through a 10 k

 or less pull up resistor. The device behaves in

DDR I mode when the PLL is turned off. In this mode, the device can be operated at a frequency of up

to 167 MHz with DDR I timing.

TDO

Output

TDO Pin for JTAG.

TCK

Input

TCK Pin for JTAG.

TDI

Input

TDI Pin for JTAG.

TMS

Input

TMS Pin for JTAG.

NC

N/A

Not Connected to the Die. Can be tied to any voltage level.

NC/144M

Input

Not Connected to the Die. Can be tied to any voltage level.

NC/288M

Input

Not Connected to the Die. Can be tied to any voltage level.

Input-

Reference

Reference Voltage Input. Static input used to set the reference level for HSTL inputs, outputs, and AC

measurement points.

Power Supply Power Supply Inputs to the Core of the Device.

Ground

Ground for the Device.

Power Supply Power Supply Inputs for the Outputs of the Device.

Pin Name

I/O

Pin Description