TNETV6446AINZWT datasheet(189/227 Pages) TI1

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VCRS

90% VOH

10% VOL

USB_DM

USB_DP

tper − tjr

TMS320DM6446

www.ti.com

SPRS283H – DECEMBER 2005 – REVISED SEPTEMBER 2010

Table 6-71. USB 2.0 Register Descriptions (continued)

Address

Acronym

0x01C6 454C

HOST_RXTYPE

Sets the operating speed, transaction protocol and peripheral endpoint number

for the host RX endpoint.

0x01C6 454D

HOST_RXINTERVAL

Sets the polling interval for Interrupt/ISOC transactions or the NAK response

timeout on Bulk transactions for host RX endpoint.

6.15.3 USB2.0 Electrical Data/Timing

Table 6-72. Switching Characteristics Over Recommended Operating Conditions for USB2.0 (see

Figure 6-59)

A-513,

-594,

-810

NO.

PARAMETER

UNIT

LOW SPEED

FULL SPEED

HIGH SPEED

1.5 Mbps

12 Mbps

480 Mbps

MIN

MAX

MIN

MAX

MIN

MAX

tr(D)

Rise time, USB_DP and USB_DM signals(1)

300

0.5

tf(D)

Fall time, USB_DP and USB_DM signals(1)

300

0.5

trfM

Rise/Fall time, matching(2)

125

111.11

–

VCRS

Output signal cross-over voltage(1)

1.3

–

tjr(source)NT

Source (Host) Driver jitter, next transition

(3)

tjr(FUNC)NT

Function Driver jitter, next transition

(3)

tjr(source)PT

Source (Host) Driver jitter, paired transition(4)

(3)

tjr(FUNC)PT

Function Driver jitter, paired transition

(3)

tw(EOPT)

Pulse duration, EOP transmitter

1250

1500

160

175

–

tw(EOPR)

Pulse duration, EOP receiver(5)

670

–

t(DRATE)

Data Rate

1.5

480 Mb/s

ZDRV

Driver Output Resistance

–

49.5

40.5

49.5

Ω

USB_R1

USB reference resistor

9.9

10.1

9.9

10.1

9.9

10.1

Ω

(1)

Low Speed: CL = 200 pF, Full Speed: CL = 50 pF, High Speed: CL = 50 pF

(2)

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

(3)

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

(4)

tjr = tpx(1) - tpx(0)

(5)

Must accept as valid EOP

Figure 6-59. USB2.0 Integrated Transceiver Interface Timing

Peripheral and Electrical Specifications

189

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