USB333X datasheet(16/85 Pages) MICROCHIP

16 / 85 page

USB333x

DS00001880A-page 16

 2009 - 2015 Microchip Technology Inc.

4.2

Clock Specifications

The model number for each frequency of REFCLK is provided in on the Product Identification System page.

Note 1:

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

USB333x de-asserts DIR.

The USB333x uses the AutoResume feature, Section 6.4.1.4, to allow a host start-up time of less than 1ms

4.3

ULPI Interface Timing

Note 4-4

REFCLK

does not need to be aligned in any way to the ULPI signals.

4.4

Digital IO Pins

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

60MHz REFCLK

TPREP

LPM Enable

= 0

1.0

1.1

1.2

TPREP_LPM

LPM Enable

= 1

125

150

CLKOUT

Duty Cycle

DCCLKOUT

REFCLK

Duty Cycle

DCREFCLK

REFCLK

Frequency Accuracy

FREFCLK

-500

+500

PPM

TABLE 4-4:

ULPI INTERFACE TIMING (USB333X)

Parameter

Symbol

Conditions

MIN

MAX

Units

60MHz 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

6.0

60MHz ULPI Input Clock

Setup time (STP, data in)

TSC, TSD 60MHz REFCLK

3.0

Hold time (STP, data in)

THC, THD 60MHz REFCLK

0.0

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

TDC, TDD 60Mhz REFCLK

6.0

Note:

CLoad = 10pF

TABLE 4-5:

DIGITAL IO CHARACTERISTICS: RESETB, STP, DIR, NXT, DATA[7:0], AND REFCLK

PINS

Parameter

Symbol

Conditions

MIN

TYP

MAX

Units

Low-Level Input Voltage

(USB3330, USB3331,

USB3336, and USB3338)

VIL

VSS

0.4 *

VDD18

Low-Level Input Voltage

(USB3333)

VIL

Note 4-5

VSS

0.4 *

VDDIO

High-Level Input Voltage

(USB3330, USB3331,

USB3336, and USB3338)

VIH

0.68 *

VDD18

High-Level Input Voltage

(USB3333)

VIH

0.68 *

VDDIO

USB333X датащи(PDF) 16 Page - Microchip Technology

USB333X датащи(HTML) 16 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85

датащи скачать

ссылки URL