Cypress CY7C1525KV18 Referenced with Respect to, TDO for Jtag, TCK Pin for Jtag, TDI Pin for Jtag

								CY7C1510KV18, CY7C1525KV18
								CY7C1512KV18, CY7C1514KV18
Pin Definitions (continued)
	Pin Name	I/O						Pin Description
	CQ	Echo Clock	CQ Referenced with Respect to C. This is a free running clock and is synchronized to the input clock
			for output data (C) of the QDR-II. In single clock mode, CQ is generated with respect to K. The timing for
			the echo clocks is shown in Switching Characteristics on page 23.
		Echo Clock		Referenced with Respect to				. This is a free running clock and is synchronized to the input clock
	CQ		CQ				C
			for output data		(C)	of the QDR-II. In single clock mode, CQ is generated with respect to K. The timing for
			the echo clocks is shown in the Switching Characteristics on page 23.
	ZQ	Input	Output Impedance Matching Input. This input is used to tune the device outputs to the system data bus
			impedance. CQ, CQ, and Q[x:0] output impedance are set to 0.2 x RQ, where RQ is a resistor connected
			between ZQ and ground. Alternatively, connect this pin directly to VDDQ, which enables the minimum
			impedance mode. This pin cannot be connected directly to GND or left unconnected.
		Input	PLL Turn Off − Active LOW. Connecting this pin to ground turns off the PLL inside the device. The timing
	DOFF
			in the operation with the PLL turned off differs from those listed in this data sheet. For normal operation,
			connect this pin to a pull up through a 10 KΩ or less pull up resistor. The device behaves in QDR-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 QDR-I timing.
	TDO	Output	TDO 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.
	VREF	Input-	Reference Voltage Input. Static input used to set the reference level for HSTL inputs, outputs, and AC
		Reference	measurement points.
	VDD	Power Supply	Power Supply Inputs to the Core of the Device.
	VSS	Ground	Ground for the device.
	VDDQ	Power Supply	Power Supply Inputs for the Outputs of the Device.

Document Number: 001-00436 Rev. *E Page 7 of 30

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