ISP1505C NXP [NXP Semiconductors], ISP1505C Datasheet - Page 32
ISP1505C
Manufacturer Part Number
ISP1505C
Description
ULPI Hi-Speed USB host and peripheral transceiver
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.ISP1505C.pdf
(76 pages)
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NXP Semiconductors
Table 16.
ISP1505A_ISP1505C_3
Product data sheet
Packet sequence High-speed
Transmit-Transmit
(host only)
Receive-Transmit
(host or
peripheral)
Receive-Receive
(peripheral only)
Transmit-Receive
(host or
peripheral)
Fig 11. High-speed transmit-to-transmit packet timing
CLOCK
DATA
DP or
DIR
[7:0]
STP
NXT
DM
D
N 1
Link decision times
D
N
link delay
15 to 24
1 to 14
1
92
DATA
TX end delay (two to five clocks)
Full-speed
link delay
7 to 18
7 to 18
1
80
EOP
Low-speed
link delay
77 to 247
77 to 247
1
718
Rev. 03 — 26 August 2008
link decision time (15 to 24 clocks)
USB interpacket delay (88 to 192 high-speed bit times)
Definition
Number of clock cycles a host link must wait before driving
the TXCMD for the second packet.
In high-speed, the link starts counting from the assertion of
STP for the first packet.
In full-speed, the link starts counting from the RXCMD,
indicating LINESTATE has changed from SE0 to J for the
first packet. The timing given ensures inter-packet delays of
2 bit times to 6.5 bit times.
Number of clock cycles the link must wait before driving the
TXCMD for the transmit packet.
In high-speed, the link starts counting from the end of the
receive packet; deassertion of DIR or an RXCMD, indicating
RxActive is LOW.
In full-speed or low-speed, the link starts counting from the
RXCMD, indicating LINESTATE has changed from SE0 to J
for the receive packet. The timing given ensures
inter-packet delays of 2 bit times to 6.5 bit times.
Minimum number of clock cycles between consecutive
receive packets. The link must be able to receive both
packets.
Host or peripheral transmits a packet and will time-out after
this number of clock cycles if a response is not received.
Any subsequent transmission can occur after this time.
ULPI HS USB host and peripheral transceiver
ISP1505A; ISP1505C
IDLE
(one to two clocks)
© NXP B.V. 2008. All rights reserved.
TXCMD
TX start delay
004aaa712
SYNC
D0
31 of 75
D1
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