TMS320VC5504 datasheet(116/128 Pages) TI

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6.16.2 USB2.0 Electrical Data/Timing

VCRS

90%VOH

10%VOL

USB_DM

USB_DP

tper - tjr

TMS320VC5504

Fixed-Point Digital Signal Processor

SPRS609A – JUNE 2009 – REVISED JULY 2009

www.ti.com

Table 6-38. Switching Characteristics Over Recommended Operating Conditions for USB2.0 (see

Figure 6-30)

CVDD = 1.05 V

CVDD = 1.3 V

NO.

PARAMETER

FULL SPEED

HIGH SPEED

UNIT

12 Mbps

480 Mbps(1)

MIN

MAX

MIN

MAX

tr(D)

Rise time, USB_DP and USB_DM signals(2)

0.5

tf(D)

Fall time, USB_DP and USB_DM signals(2)

0.5

trfM

Rise/Fall time, matching(3)

111

–

VCRS

Output signal cross-over voltage(2)

1.3

–

tw(EOPT)

Pulse duration, EOP transmitter(4)

160

175

–

tw(EOPR)

Pulse duration, EOP receiver(4)

–

t(DRATE)

Data Rate

480

Mb/s

ZDRV

Driver Output Resistance

40.5

49.5

40.5

49.5

Ω

ZINP

Receiver Input Impedance

100k

Ω

(1)

For more detailed informaton, see the Universal Serial Bus Specification, Revision 2.0, Chapter 7.

(2)

Full Speed and High Speed CL = 50 pF

(3)

tRFM = (tr/tf) x 100. [Excluding the first transaction from the Idle state.]

(4)

Must accept as valid EOP

Figure 6-30. USB2.0 Integrated Transceiver Interface Timing

116

Peripheral Information and Electrical Specifications

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