User Manual

LED (Light Emitting Diode), the corresponding PL pins need to be driven high. The tri-color LED (Light Emitting Diode) will emit a
color dependent on the combination of internal LEDs that are currently being illuminated. For example, if the red and blue signals are
driven high and green is driven low, the tri-color
LED (Light Emitting Diode) will emit a purple color.
Note: Digilent strongly recommends the use of pulse-width modulation (PWM) when driving the tri-colo LEDs. Driving any of the signals to a steady logic '1'
will result in the
LED (Light Emitting Diode) being illuminated at an uncomfortably bright level. This can be avoided by ensuring that none of the tri-color
signals are driven with more than a 50% duty cycle. Using PWM also greatly expands the potential color palette of the tri-color LED (Light Emitting Diode).
Individually adjusting the duty cycle of each color between 0% and 50% causes the different colors to be illuminated at different intensities, allowing virtually any
color to be displayed.
Pmod ports are 2×6, right-angle, 100-mil spaced female connectors that mate with standard 2×6 pin headers. Each 12-pin Pmod port
provides two 3.3V
VCC (Positive Voltage Supply) signals (pins 6 and 12), two Ground signals (pins 5 and 11), and eight logic signals, as
shown in Figure 13.1. The VCC (Positive Voltage Supply) and Ground pins can deliver up to 1A of current, but care must be taken not
to exceed any of the power budgets of the on-board regulators or the external power supply (as described in the
Power supplies section).
The vivado-library and vivado-hierarchies repositories on the Digilent Github (https://github.com/Digilent/) contains pre-made IP
cores for many of these Pmods that greatly reduces the work of integrating them into your project. See the Pmod-related tutorials on the
Eclypse Z7 Resource Center for help using them.
The Eclypse Z7's two Pmod ports are connected to the Zynq PL via high-speed down translation and protection circuitry. When used as
outputs, the Pmod pins are driven at 3.3V. When used as inputs, the Pmod pins are 5V tolerant. The maximum recommended voltage
applied to these pins is 5.5V, though the inline resettable fuses will protect the FPGA pins from damage.
13. Pmod Ports
Digilent produces a large collection of Pmod accessory boards that can attach to the Pmod ports to add ready-made functions like
A/D’s, D/A’s, motor drivers, sensors, and other functions.