TXENL
TXDPLS
TXSE0
RCVDPLS
RCVDMNS
RCVDATA
Transmit
Receive
FSU15 FSU18
FSU16 FSU19FSU17
FSU20
FSU20
FSU21
FSU21
RM46L852
SPNS185 –SEPTEMBER 2012
www.ti.com
5.13 Universal Serial Bus Controller
5.13.1 Features
This device provides several varities of USB functionality, including:
• One full-speed USB device port compatible with the USB Specification Revision 2.0 and USB
Specification Revision 1.1
• Two USB host ports compatible with USB Specification Revision 2.0, which is based on the OHCI
Specification For USB Release 1.0.
5.13.2 Electrical and Timing Specifications
Table 5-41. Full-Speed USB Interface Timing Requirements
(1)
NO. Parameter MIN MAX Unit
FSU20 t
d(VPL, VML)
Time duration, RCVDPLS and 14 ns
RCVDMNS low together during
transition
FSU21 t
d(VPH, VMH)
Time duration, RCVDPLS and 8 ns
RCVDMNS high together during
transition
(1) The capacitive loading is equivalent tp 15 pF
Table 5-42. Full-Speed USB Interface Switching Characteristics
(1)
NO. Parameter MIN MAX Unit
FSU15 t
d(TXENL–DATV)
Delay time TXENL active to 0 1.5 ns
TXDPLS valid
FSU16 t
d(TXENL–SE0V)
Delay time TXENL active to TXSE0 0 1.5 ns
valid
FSU17 t
s(DAT–SE0)
Skew between TXDPLS and TXSE0 1.5 ns
transition
FSU18 t
d(TXENH–DATI)
Delay time TXENL inactive to 0 1.5 ns
TXDPLS invalid
FSU19 t
d(TXENH–SE0I)
Delay time TXENL inactive to 0 1.5 ns
TXSE0 invalid
(1) The capacitive loading is equivalent tp 15 pF
Figure 5-27. Full-Speed USB Interface – Transmit and Receive Modes
164 Peripheral Information and Electrical Specifications Copyright © 2012, Texas Instruments Incorporated
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