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CY7C1161V18, CY7C1176V18
CY7C1163V18, CY7C1165V18
Document Number: 001-06582 Rev. *D Page 7 of 29
CQ
Echo Clock Synchronous Echo Clock Outputs. This is a free running clock and is synchronized to the input
clock (K
) of the QDR-II+. The timings for the echo clocks are shown in “Switching Characteristics”
on page 23.
ZQ Input Output Impedance Matching Input. 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 is connected directly to V
DDQ
, which
enables the minimum impedance mode. This pin cannot be connected directly to GND or left uncon-
nected.
DOFF
Input DLL Turn Off − Active LOW. Connecting this pin to ground turns off the DLL inside the device. The
timings in the DLL turned-off operation are different from those listed in this data sheet. For normal
operation, this pin is connected to a pull up through a 10 KΩ or less pull up resistor. The device
behaves in QDR-I mode when the DLL is turned off. In this mode, the device operates 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/36M N/A Not Connected to the Die. Can be tied to any voltage level.
NC/72M N/A Not Connected to the Die. Can be tied to any voltage level.
NC/144M N/A Not Connected to the Die. Can be tied to any voltage level.
NC/288M N/A Not Connected to the Die. Can be tied to any voltage level.
V
REF
Input-
Reference
Reference Voltage Input. Static input used to set the reference level for HSTL inputs, outputs, and
AC measurement points.
V
DD
Power Supply Power Supply Inputs to the Core of the Device.
V
SS
Ground Ground for the Device.
V
DDQ
Power Supply Power Supply Inputs for the Outputs of the Device.
Pin Definitions (continued)
Pin Name IO Pin Description
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