Отправлено SerP 06 апреля 2001 г. 20:12 В ответ на: Ответ: отправлено ВН 05 апреля 2001 г. 14:30

Add the recommended de-coupling capacitors for as many
VCCIO/GND pairs as possible

Add external buffers at the output of a counter to minimize the
loading on Altera device pins

Configure the I/O pin as an output pin and then drive the output
low. This configuration will act as a virtual ground. This low driving
output pin can be connected to GNDINT and/or the board’s ground
plane

AN075.PDF p.9