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| CY7C1511JV18, CY7C1526JV18 | |
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| CY7C1513JV18, CY7C1515JV18 | |
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Pin Definitions (continued) | ||||||||||||
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| Pin Name | IO |
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| Pin Description | |||
| CQ | Echo Clock |
| CQ is Referenced with Respect to C. This is a free running clock and is synchronized to the input clock | ||||||||
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| for output data (C) of the | ||||||
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| for the echo clocks are shown in the Switching Characteristics on page 23. | ||||||
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| Echo Clock |
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| is Referenced with Respect to |
| . This is a free running clock and is synchronized to the input clock | |||
| CQ |
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| CQ | C | ||||||
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| for output data (C) of the | ||||||
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| for the echo clocks are 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 | ||||||||
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| impedance. CQ, CQ, and Q[x:0] output impedance are set to 0.2 x RQ, where RQ is a resistor connected | ||||||
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| between ZQ and ground. Alternatively, this pin can be connected directly to VDDQ, which enables the | ||||||
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| minimum impedance mode. This pin cannot be connected directly to GND or left unconnected. | ||||||
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| Input |
| DLL Turn Off − Active LOW. Connecting this pin to ground turns off the DLL inside the device. The | ||||||
| DOFF | |||||||||||
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| timings in the DLL turned off operation differs from those listed in this data sheet. For normal operation, | ||||||
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| this pin can be connected to a pull up through a 10 KΩ or less pull up resistor. The device behaves in | ||||||
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| TDO | Output |
| TDO for JTAG. | ||||||||
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| TCK | Input |
| TCK Pin for JTAG. | ||||||||
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| TDI | Input |
| TDI Pin for JTAG. | ||||||||
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| TMS | Input |
| TMS Pin for JTAG. | ||||||||
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| NC | N/A |
| Not Connected to the Die. Can be tied to any voltage level. | ||||||||
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| NC/144M | N/A |
| Not Connected to the Die. Can be tied to any voltage level. | ||||||||
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| NC/288M | N/A |
| Not Connected to the Die. Can be tied to any voltage level. | ||||||||
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| VREF | Input- |
| Reference Voltage Input. Static input used to set the reference level for HSTL inputs, outputs, and AC | ||||||||
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| 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: | Page 7 of 27 |
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