參數(shù)資料
型號： TMS320DM355_07
廠商： Texas Instruments, Inc.
英文描述： Digital Media System-on-Chip (DMSoC)
中文描述： 數(shù)字媒體系統(tǒng)芯片（DMSoC）
文件頁數(shù)： 127/158頁
文件大?。?/td> 1319K
代理商： TMS320DM355_07
www.ti.com
P
5.10
USB 2.0
5.10.1 USB2.0 Electrical Data/Timing
TMS320DM355
Digital Media System-on-Chip (DMSoC)
SPRS463B–SEPTEMBER 2007–REVISED OCTOBER 2007
DM355 includes a USB Controller Module that is built around the Mentor USB Multi-Point High-Speed
Dual Role Controller, endpoint memory, CPPI DMA controller and UTMI+ PHY. The controller conforms to
USB 2.0 Specification. The DM355 USB2.0 peripheral supports the following features:
USB 2.0 peripheral at speeds high speed (HS: 480 Mb/s) and full speed (FS: 12 Mb/s)
USB 2.0 host at speeds HS, FS, and low speed (LS: 1.5 Mb/s)
All transfer modes (control, bulk, interrupt, and isochronous)
Four Transmit (TX) and four Receive (RX) endpoints in addition to endpoint 0
FIFO RAM
–
4K endpoint
–
Programmable FIFO size
Connects to a standard UTMI+ PHY with a 60 MHz, 8-bit interface
Includes a DMA sub-module that supports four TX and four RX channels of CPPI 3.0 DMAs
RNDIS mode for accelerating RNDIS type protocols using short packet termination over USB
USB OTG extensions, i.e. session request protocol (SRP) and host negotiation protocol (HNP)
The DM355 USB2.0 peripheral does not support the following features:
On-chip charge pump
High bandwidth ISO mode is not supported (triple buffering)
16-bit 30 MHz UTMI+ interface is not supported
RNDIS mode acceleration for USB sizes that are not multiples of 64 bytes
Endpoint max USB packet sizes that do not conform to the USB 2.0 spec (for FS/LS: 8, 16, 32, 64,
and 1023 are defined; for HS: 64, 128, 512, and 1024 are defined)
Table 5-25. Switching Characteristics Over Recommended Operating Conditions for USB2.0 (see
Figure 5-33
)
DM355
FULL SPEED
12 Mbps
MIN
4
4
90
1.3
LOW SPEED
1.5 Mbps
MIN
75
75
80
1.3
HIGH SPEED
(1)
480 Mbps
MIN
0.5
0.5
NO.
PARAMETER
UNIT
MAX
300
300
125
MAX
MAX
1
2
3
4
5
t
r(D)
t
f(D)
t
frfm
V
CRS
t
jr(source)NT
t
jr(FUNC)NT
t
jr(source)PT
t
jr(FUNC)PT
t
w(EOPT)
t
w(EOPR)
t
(DRATE)
Z
DRV
Rise time, USB_DP and USB_DM signals
(2)
Fall time, USB_DP and USB_DM signals
(2)
Rise/Fall time, matching
(3)
Output signal cross-over voltage
(2)
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
20
20
ns
ns
%
V
ns
ns
ns
ns
ns
ns
111.11
2
2
2
2
2
1
1
25
6
1
10
7
8
9
1250
670
1500
160
82
175
1.5
12
480
49.5
Mb/s
10
–
–
28
49.5
40.5
(1)
(2)
(3)
(4)
For more detailed specification information, see the Universal Serial Bus Specification Revision 2.0, Chapter 7. Electrical.
Low Speed: C
L
= 200 pF, Full Speed: C
L
= 50 pF, High Speed: C
L
= 50 pF
t
frfm
= (t
r
/t
f
) x 100. [Excluding the first transaction from the Idle state.]
t
jr
= t
px(1)
- t
px(0)
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DM355 Peripheral Information and Electrical Specifications
127
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