USB334X datasheet(16/92 Pages) MICROCHIP

16 / 92 page

USB334x

DS00002646A-page 16

 2009-2018 Microchip Technology Inc.

Note 4-1

ClockSuspendM bit = 0.

Note 4-2

SessEnd, VbusVld, and IdFloat comparators disabled. STP Interface protection disabled.

Note 4-3

REFCLK is OFF

4.2

Clock Specifications

The model number for each frequency of REFCLK is provided in "Product Identification System", Example a.

4.3

ULPI Interface Timing

RESET Mode

Note 4-3

IVBAT(RSTB)

RESETB = 0

VVBAT = 4.2V

VVDDIO = 1.8V

0.1

IVIO(RSTB)

TABLE 4-3:

CLOCK SPECIFICATIONS

Parameter

Symbol

Conditions

MIN

TYP

MAX

Units

Suspend Recovery Time

TSTART

LPM Enable = 0

1.0

1.1

1.2

TSTART_LPM

LPM Enable = 1

125

150

PHY Preparation Time

60 MHz REFCLK

TPREP

LPM Enable = 0

1.0

1.1

1.2

TPREP_LPM

LPM Enable = 1

125

150

CLKOUT Duty Cycle

DCCLKOUT

ULPI Clock Input Mode

REFCLK Duty Cycle

DCREFCLK

REFCLK Frequency Accuracy

FREFCLK

-500

+500

PPM

Note:

•TSTART and TPREP are measured from the time when REFCLK and RESETB are both valid to when the

USB334x de-asserts DIR.

• The USB334x uses the AutoResume feature, Section 6.4.1.4, "Host Resume K," on page 53, to allow a host

start-up time of less than 1ms.

TABLE 4-4:

ULPI INTERFACE TIMING

Parameter

Symbol

Conditions

MIN

MAX

Units

60 MHz ULPI Output Clock Note 4-4

Setup time (STP, data in)

TSC, TSD

Model-specific REFCLK

5.0

Hold time (STP, data in)

THC, THD

Model-specific REFCLK

0.0

Output delay (control out, 8-bit data out)

TDC, TDD

Model-specific REFCLK

1.5

60 MHz ULPI Input Clock

Setup time (STP, data in)

TSC, TSD

60 MHz REFCLK

3ns

Hold time (STP, data in)

THC, THD

60 MHz REFCLK

0ns

Output delay (control out, 8-bit data out)

TDC, TDD

60 MHz REFCLK

0.5

6.0

TABLE 4-2:

OPERATING CURRENT (USB3343) (CONTINUED)

Parameter

Symbol

Conditions

MIN

TYP

MAX

Units

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