Rainbow-electronics AT89C5122 Manual do Utilizador descarregar pdf (Página 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

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