Clock and PLL Pins
Pin Name | Pin Functions | Pin Description | Connection Guidelines |
---|---|---|---|
CLK [0..7]p | Clock, I/O | Dedicated global clock input pins that can also be used for the positive terminal inputs for differential global clock input or user input pins. When these clock input pins are used as single-ended pins, you can disregard the p notation. CLK[0..7]p pins can function as regular I/O pins. |
Connect unused pins to the VCCIO of the bank in which the pins reside or GND. See Notes 2 and 3. |
CLK[0..7]n | Clock, I/O | Dedicated global clock input pins that can also be used for the negative terminal inputs for differential global clock input or user input pins. When these clock input pins are used as single-ended pins, you can disregard the n notation. CLK[0..7]n pins can function as regular I/O pins. |
Connect unused pins to the VCCIO of the bank in which the pins reside or GND. See Notes 2 and 3. |
DPCLK[0..3] | I/O, Input | DPCLK pins can connect to the global clock network for high fan-out control signals such as clocks, asynchronous clears, presets, and clock enables. DPCLK pins cannot feed a PLL input. | Connect unused pins to the VCCIO of the bank they reside in or GND. These pins can function as regular I/O pins. See Note 3. |
PLL_[L,R,B,T]_CLKOUTp | I/O, Output | Optional positive terminal for external clock outputs from PLL [1..4]. These pins can be assigned to single-ended or differential I/O standards if it is being fed by a PLL output.
The availability for PLL_[L,R,B,T]_CLKOUTp pins varies for each device density and package combination. For details, refer to the specific device pinout file. |
Connect unused pins to GND. These pins can function as regular I/O pins. See Note 3. |
PLL_[L,R,B,T]_CLKOUTn | I/O, Output | Optional negative terminal for external clock outputs from PLL [1..4]. These pins can be assigned to single-ended or differential I/O standards if it is being fed by a PLL output.
The availability for PLL_[L,R,B,T]_CLKOUTn pins varies for each device density and package combination. For details, refer to the specific device pinout file. |
Connect unused pins to GND. These pins can function as regular I/O pins. See Note 3. |