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CY7C1412KV18 Datasheet(PDF) 8 Page - Cypress Semiconductor |
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CY7C1412KV18 Datasheet(HTML) 8 Page - Cypress Semiconductor |
8 / 33 page CY7C1425KV18 CY7C1412KV18 CY7C1414KV18 Document Number: 001-57825 Rev. *I Page 8 of 33 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 × 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. DOFF Input PLL turn off active LOW. Connecting this pin to ground turns off the PLL inside the device. The timing 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 K 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 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/72M Input 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 Reference voltage input. Static input used to set the reference level for HSTL inputs, outputs, and AC 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. Pin Definitions (continued) Pin Name I/O Pin Description |
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