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70 page 
PRELIMINARY PSoC® 5: CY8C55 Family Datasheet Document Number: 001-66235 Rev. *A Page 70 of 114 11.4.3 USBIO For operation in GPIO mode, the standard range for VDDD applies, see Device Level Specifications on page 60. Figure 11-13. USBIO Output High Voltage and Current, GPIO Mode Figure 11-14. USBIO Output Low Voltage and Current, GPIO Mode Table 11-13. USBIO DC Specifications Parameter Description Conditions Min Typ Max Units Rusbi USB D+ pull-up resistance With idle bus 0.900 – 1.575 k Ω Rusba USB D+ pull-up resistance While receiving traffic 1.425 – 3.090 k Ω Vohusb Static output high 15 k Ω ±5% to Vss, internal pull-up enabled 2.8 – 3.6 V Volusb Static output low 15 k Ω ±5% to Vss, internal pull-up enabled – – 0.3 V Vihgpio Input voltage high, GPIO mode VDDD ≥ 3 V 2 – – V Vilgpio Input voltage low, GPIO mode VDDD ≥ 3 V – – 0.8 V Vohgpio Output voltage high, GPIO mode IOH = 4 mA, VDDD ≥ 3 V 2.4 – – V Volgpio Output voltage low, GPIO mode IOL = 4 mA, VDDD ≥ 3 V – – 0.3 V Vdi Differential input sensitivity |(D+)–(D–)| – – 0.2 V Vcm Differential input common mode range 0.8 – 2.5 V Vse Single ended receiver threshold 0.8 – 2 V Rps2 PS/2 pull-up resistance In PS/2 mode, with PS/2 pull-up enabled 3 – 7 k Ω Rext External USB series resistor In series with each USB pin 21.78 (–1%) 22 22.22 (+1%) Ω Zo USB driver output impedance Including Rext 28 – 44 Ω CIN USB transceiver input capacitance – – 20 pF IIL Input leakage current (absolute value) 25 °C, VDDD = 3.0 V – – 2 nA |
