P0305 Terasic Technologies Inc, P0305 Datasheet - Page 8

• Manufacturer Part Number: P0305
• Description: KIT MAX II MICRO
• Manufacturer: Terasic Technologies Inc
• Series: MAX® IIr
• Type: FPGAr

Specifications of P0305

• Contents: Evaluation Board, Cable(s), Software and Documentation
• For Use With/related Products: EPM2210F324
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pushbutton switches
Clock inputs
Prototyping Areas
2.3
The complete schematic can be found in the Schematic folder of MAX II Micro System CD-ROM.
The following sections describe the major parts of the schematic in detail.
2.3.1
The MAX II Micro board provides four pushbutton switches. Each of these switches is debounced
using a Schmitt Trigger circuit, as indicated in Figure 2.3. The four outputs called KEY0, …, KEY3
of the Schmitt Trigger device are connected directly to the MAX II CPLD. Each switch provides a
high logic level (3.3 volts) when it is not pressed, and provides a low logic level (0 volts) when
depressed. Since the pushbutton switches are debounced, they are appropriate for use as clock or
reset inputs in a circuit.
There are 8 user-controllable LEDs on the MAX II Micro board. Each LED is driven directly by a
pin on the MAX II CPLD; driving its associated pin to a high logic level turns the LED on, and
driving the pin low turns it off.
4 pushbutton switches
Debounced by a Schmitt trigger circuit
Normally high; generates one active-low pulse when the switch is pressed
50-MHz oscillator
A 40-pin expansion port area compatible with Altera DE2/DE1 expansion ports.
Prototyping Area A with 68 GPIO, 6 3.3V, 2 5V and 8 GND pins
Prototyping Area B with 20 GPIO, 2 3.3V, and 2 GND pins
S chematic of the MAX II Micro Board
5 B
L EDs, Switches, and Clock Inputs
6 B
Figure 2.3. Switch debouncing.
6
MMK User Manual