GPIO-B Single-Ended I/O Standards Specifications
GPIO-B Single-Ended SSTL, HSTL, HSUL, POD and LVSTL I/O Reference Voltage Specifications
GPIO-B Single-Ended SSTL, HSTL, HSUL, and POD I/O Standards Signal Specifications
GPIO-B Single-Ended LVSTL I/O Standards Specifications
GPIO-B Differential SSTL, HSTL, and HSUL I/O Standards Specifications
GPIO-B Differential POD I/O Standards Specifications
GPIO-B Differential LVSTL I/O Standards Specifications
GPIO-B Differential I/O Standards Specifications
LVDS SERDES Specifications
DPA Lock Time Specifications
LVDS SERDES Soft-CDR Sinusoidal Jitter Tolerance Specifications
Memory Standards Supported
Memory Output Clock Jitter Specifications
Performance Specifications of the HBM2E Interface
Performance Specifications of Network on Chip (NoC)
NOC Reference Clock Requirements
HPS Clock Performance
HPS Internal Oscillator Frequency
HPS PLL Specifications
HPS Cold Reset
HPS SPI Timing Characteristics
HPS SD/MMC Timing Characteristics
HPS USB UPLI Timing Characteristics
HPS Ethernet Media Access Controller (EMAC) Timing Characteristics
HPS I2C Timing Characteristics
HPS NAND Timing Characteristics
HPS Trace Timing Characteristics
HPS GPIO Interface
HPS JTAG Timing Characteristics
HPS Programmable I/O Timing Characteristics
HPS GPIO Interface
The general-purpose I/O (GPIO) interface has debounce circuitry included to remove signal glitches. The debounce clock frequency ranges from 125 Hz to 32 kHz. The minimum pulse width is 1 debounce clock cycle and the minimum detectable GPIO pulse width is 62.5 µs (at 32 kHz).
If the external signal is driven into the GPIO for less than one clock cycle, the external signal is filtered. If the external signal is between one and two clock cycles, the external signal may or may not be filtered depending on the phase of the signal. If the external signal is more than two clock cycles, the external signal is not filtered.