Cypress Semiconductor EZ-Host CY7C67300 User Manual download pdf (Page 107)

CY7C6730

PRELIMINARY

Document #: 38-08015 Rev. *D Page 107 of 120

13.1 USB Transceiver

USB 2.0-certified in full- and low-speed modes.

14.0 AC Timing Characteristics

14.1 Reset Timing

Note:

12. Clock is 12 MHz nominal.

E Efficiency When Loaded I

LOAD

= 8mA, VCC = 3.3V 75 %

Data Line Pull-down 14.25 24.8 Ω

A_BUS_IN

A-device V

BUS

Input Impedance

to GND

BUS

is not being driven 40 100 kΩ

B_SRP_UP

B-device V

BUS

SRP Pull-up Pull-up voltage = 3.0V 281 Ω

B_SRP_DWN

B-device V

BUS

SRP Pull-down 656 Ω

Parameter Description Min. Typical Max. Unit

RESET

nRESET pulse width 16 clocks

[12]

IOACT

nRESET HIGH to nRD or

nWRx active

200 µs

Table 13-2. DC Characteristics: Charge Pump (continued)

Parameter Description Conditions Min. Typ. Max. Unit

nRESET

nRD or nWRL or nWRH

RESET

IOACT

Reset Timing

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 119 120

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Cypress Semiconductor EZ-Host CY7C67300 User Manual Page 107

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