ISP1508BET STEricsson, ISP1508BET Datasheet - Page 36
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ISP1508BET
Manufacturer Part Number
ISP1508BET
Description
Manufacturer
STEricsson
Datasheet
1.ISP1508BET.pdf
(87 pages)
Specifications of ISP1508BET
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NXP Semiconductors
ISP1508A_ISP1508B_2
Product data sheet
For more information, refer to UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1 .
b. Host chirp: If the host does not detect the peripheral chirp, it must continue
c. High-speed idle: The peripheral must detect a minimum of Chirp K-J-K-J-K-J. Each
than 7 ms after reset time T
up its clock within 5.6 ms, leaving 200 s for the link to start transmitting the
Chirp K, and 1.2 ms for the Chirp K to complete (worst case with 10 % slow clock).
asserting SE0 until the end of reset. If the host detects the peripheral Chirp K for
no less than 2.5 s, then no more than 100 s after the bus leaves the Chirp K
state, the host sends a TXCMD (NOPID) with an alternating sequence of Chirp Ks
and Js. Each Chirp K or Chirp J must last no less than 40 s and no longer than
60 s.
Chirp K and Chirp J must be detected for at least 2.5 s. After seeing that
minimum sequence, the peripheral sets TERMSELECT = 0b and OPMODE[1:0] =
00b. The peripheral is now in high-speed mode and sees !squelch (01b on
LINESTATE). When the peripheral sees squelch (10b on LINESTATE), it knows
that the host has completed chirp and waits for Hi-Speed USB traffic to begin. After
transmitting the chirp sequence, the host changes OPMODE[1:0] to 00b and
begins sending USB packets.
Rev. 02 — 13 March 2008
0
. If the peripheral is in low-power mode, it must wake
ISP1508A; ISP1508B
ULPI HS USB OTG transceiver
© NXP B.V. 2008. All rights reserved.
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