請問有關USB 1.1 differential input receiver sesnsitivity問題

ppqq

USB 1.1 Spec 裡談到 differential input receiver sensitivity如下:

- M* t7 c0 \" U# X2 Z6 v) JA differential input receiver must be used to accept the USB data signal. The receiver must feature an input sensitivity (VDI) of at least 200mV when both differential data inputs are in the differential common mode range (VCM) of 0.8V to 2.5V
/ ^: n; `. {) |5 {6 W+ {; z
) h; j/ O4 v5 Q7 P: p是說 (VDI)必須要大於200mV嗎?
如果(VDI)小於200mV時,input defferential receiver 已可以compare出,那麼這樣的設計算是fail嗎?

jarodz

應該不算fail吧！應該是over spec.