tea2025b引脚功能

ConnectorsSPECIFICATIONS AND DRAWINGS ARE SUBJECT TO ALTERATION WITHOUT PRIOR NOTICE - DIMENSIONS IN MILLIMETER E-9 I/O Connectors Trading Division U S B (U ni ve rs al S er ia lB us an d IE EE 13 94 1 3 2 4 TH Type Recommended PCB Layout Top View Part Number USB-B-001 *USB-B-001-30 * see Materials and Finish Specifications Insulation Resistance: 1000M ? min. Current Rating: 1A max. per co

There are 27 user-controllable LEDs on the DE2-70 board. Eighteen red LEDs are situated above the 18 toggle switches, and eight green LEDs are found above the pushbutton switches (the 9th green LED is in the middle of the 7-segment displays). Each LED is driven directly by a pin on the Cyclone II FPGA; driving its associated pin to a high logic level turns the LED on, and driving the pin low t