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AM1810_15 Datasheet, PDF (184/262 Pages) Texas Instruments – AM1810 ARM® Microprocessor For PROFIBUS
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AM1810
SPRS709D – NOVEMBER 2010 – REVISED MARCH 2014
www.ti.com
6.20.2 USB0 [USB2.0] Electrical Data/Timing
The USB PHY PLL can support input clock of the following frequencies: 12.0 MHz, 13.0 MHz, 19.2 MHz,
20.0 MHz, 24.0 MHz, 26.0 MHz, 38.4 MHz, 40.0 MHz or 48.0 MHz. USB_REFCLKIN jitter tolerance is 50
ppm maximum.
Table 6-91. Switching Characteristics Over Recommended Operating Conditions for USB0 [USB2.0] (see
Figure 6-44)
1.2V, 1.1V, 1.0V
NO.
PARAMETER
LOW SPEED
1.5 Mbps
FULL SPEED
12 Mbps
1 tr(D)
2 tf(D)
3 trfM
4 VCRS
5 tjr(source)NT
tjr(FUNC)NT
6 tjr(source)PT
tjr(FUNC)PT
7 tw(EOPT)
8 tw(EOPR)
9 t(DRATE)
10 ZDRV
11 ZINP
Rise time, USB_DP and USB_DM signals(1)
Fall time, USB_DP and USB_DM signals(1)
Rise/Fall time, matching(2)
Output signal cross-over voltage(1)
Source (Host) Driver jitter, next transition
Function Driver jitter, next transition
Source (Host) Driver jitter, paired transition(4)
Function Driver jitter, paired transition
Pulse duration, EOP transmitter
Pulse duration, EOP receiver
Data Rate
Driver Output Resistance
Receiver Input Impedance
MIN
75
75
80
1.3
1250
670
–
100k
MAX
300
300
120
2
2
25
1
10
1500
1.5
–
MIN
4
4
90
1.3
160
82
40.5
100k
MAX
20
20
111
2
2
2
1
1
175
12
49.5
(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)
HIGH SPEED
480 Mbps
UNIT
MIN MAX
0.5
ns
0.5
ns
–
–%
–
–V
(3)ns
(3) ns
(3) ns
(3) ns
–
– ns
–
ns
480 Mb/s
40.5 49.5 Ω
-
-Ω
USB_DM
VCRS
USB_DP
10% VOL
tper − tjr
90% VOH
tr
tf
Figure 6-44. USB2.0 Integrated Transceiver Interface Timing
184 Peripheral Information and Electrical Specifications
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