Cypress CY7C1515V18 Referenced with Respect to, TDO for Jtag, TCK Pin for Jtag, TDI Pin for Jtag

						CY7C1511V18, CY7C1526V18
						CY7C1513V18, CY7C1515V18
Pin Definitions (continued)
	Pin Name	IO				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 the single clock mode, CQ is generated with respect to K. The timings
			for the echo clocks are shown in the Switching Characteristics on page 24.
		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 the single clock mode, CQ is generated with respect to K. The timings
			for the echo clocks are shown in the Switching Characteristics on page 24.
	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, this pin can be connected directly to VDDQ, which enables the
			minimum impedance mode. This pin cannot be connected directly to GND or left unconnected.
		Input	DLL Turn Off − Active LOW. Connecting this pin to ground turns off the DLL inside the device. The
	DOFF
			timings in the DLL turned off operation differs from those listed in this data sheet.
	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.
	VSS/144M	N/A	Address expansion for 144M. Can be tied to any voltage level.
	VSS/288M	N/A	Address expansion for 288M. 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: 38-05363 Rev. *F Page 7 of 32

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