isp1705 NXP Semiconductors, isp1705 Datasheet - Page 40

• Manufacturer Part Number: isp1705
• Description: Ulpi Hi-speed Usb Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ISP1705_1
Product data sheet
Fig 16. Example of using the ISP1705 to transmit and receive USB data
DATA [ 7:0 ]
CLOCK
NXT
STP
DIR
10.6.1.1 ISP1705 pipeline delays
10.6.1.2 Allowed link decision time
10.6.1 USB packet timing
10.6 USB packet transmit and receive
An example of a packet transmit and receive is shown in
packets, refer to UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1 .
The ISP1705 delays (in clock cycles) are shown in
to UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1, Section 3.8.2.6.2 .
Table 23.
The amount of clock cycles allocated to the link to respond to a received packet and
correctly receive back-to-back packets is given in
values given in
packet sequences and timing are shown in
UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1, Section 3.8.2.6.3 .
Parameter name
RXCMD delay (J and K)
RXCMD delay (SE0)
TX start delay
TX end delay (packets)
TX end delay (SOF)
RX start delay
RX end delay
link sends
TXCMD
TXCMD
PHY pipeline delays
ISP1705
accepts
TXCMD
Table 24
the next data;
DATA
link sends
ISP1705
accepts
Rev. 01 — 13 June 2008
for correct USB system operation. Examples of high-speed
High-speed PHY
delay
4
4
1 to 2
3 to 4
6 to 9
5 to 6
5 to 6
end of data
link signals
ULPI bus
is idle
Figure 17
turnaround
asserts DIR,
Full-speed PHY
delay
4
4 to 6
6 to 10
not applicable
not applicable
not applicable
17 to 18
turnaround
ISP1705
Table
causing
Table
cycle
and
24. Link designs must follow the
ULPI Hi-Speed USB transceiver
23. For detailed description, refer
RXCMD
Figure
(NXT LOW)
Figure
ISP1705
RXCMD
sends
16. For details on USB
18. For details, refer to
DATA
(NXT HIGH)
USB data
ISP1705
sends
Low-speed PHY
delay
4
16 to 18
74 to 75
not applicable
not applicable
not applicable
122 to 123
© NXP B.V. 2008. All rights reserved.
ISP1705
turnaround
DIR, causing
turnaround
deasserts
ISP1705
cycle
004aab046
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