小弟有一個問題請教各位進,,, 在操作MAX Plus II 時對没有用到的PIN 腳位要在系統內設定為高準位,,我一直找不到有介紹這樣的書籍可以練習,請問它的操作步驟要如何設定

不用設吧!?預設~與reset沒有設定的話都會是高準位吧

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走是為了到另一境界，停是為了欣賞人生；未走過千山萬水，怎知生命的虛實與輕重！？

您好: 在個人印象中,特殊設定的pin腳有兩類: 1. Dedicate input,IO pin 當不使用時需再使用十接 high/low 之狀態,避免 latch-up 發生. http://www.altera.com/support/kdb/0000/1244.html Problem What may happen if an unused dedicated input or dedicated I/O pin on my Altera device is not grounded? Solution If the dedicated input pin is left floating, then it no longer remains in the saturation or cut-off region of the I-V graph. The device may start drawing an excessive amount of current, which could cause damage to the pin and the device. 2. Reserve pins. 可指定floating or connect to low 增加接地路徑降低雜訊 http://www.altera.com/support/kdb/1999/03/rd03191999_9486.html Problem Why does the MAX PLUS® II software allow me to connect all my unused I/O pins to ground for a MAX® 7000AE device, but for other MAX 7000 devices it says I must leave them unconnected? Solution By default, the MAX PLUS II software has all the unused I/O pins in MAX 7000AE devices drive out low. Connecting the pins to ground gives the die a better connection to ground, reducing system noise. This process allows you to leave the pins unconnected or connects the pins to ground on the printed circuit board (PCB). You can override this setting by assigning unused input signals to the pins. The MAX PLUS II software will then tri-state the unused pin, and allow you to connect the pin to ground, VCC, or another device. For all other MAX 7000 devices, the unused I/O pins are RESERVED by the MAX PLUS II software and must be left unconnected. RESERVED pins can either drive out high or low during device operation, and connecting these pins to a trace may lead to contention on the PCB. If you want to connect the unused I/O pins to ground, you must assign an unused input signal to the pin. The MAX PLUS II software will then tri-state the unused pin, and allow the user to connect the pin to ground, VCC, or another device. 或您可上 www.altera.com searching "reserve pin" ... 發表人 - ssejack 於 2005/09/19 10:10:43

因為不了解,才會想將没有設定的腳位連接到H/L 謝謝 ssejack 大大的指導