Rainbow Electronics AT89C5122 - Manual (Page 192)

192
AT8xC5122/23
4202E–SCR–06/06
USB Interface Figure 113. USB Interface
Symbol Parameter Min Typ (5) Max Unit
V
REF
USB Reference Voltage 3.0 3.6 V
V
IH
Input High Voltage for D+ and D- (driven) 2.0 4.0 V
V
IHZ
Input High Voltage for D+ and D- (floating) 2.7 3.6 V
V
IL
Input Low Voltage for D+ and D- 0.8 V
V
OH
Output High Voltage for D+ and D- 2.8 3.6 V
V
OL
Output Low Voltage for D+ and D- 0.0 0.3 V