PRODUCTPREVIEW
TXENL
TXDPLS
TXSE0
RCVDPLS
RCVDMNS
RCVDATA
Transmit
Receive
FSU15
FSU18
FSU16
FSU19
FSU17
FSU20
FSU20
FSU21
FSU21
RM46L852
SPNS185 – SEPTEMBER 2012
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
Summary of Contents for RM46L852
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