isp1508a NXP Semiconductors, isp1508a Datasheet - Page 30

• Manufacturer Part Number: isp1508a
• Description: Isp1508a; Isp1508b Ulpi Hi-speed Universal Serial Bus Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 16.
Table 17.
DP_PULLDOWN = 0.
ISP1508A_ISP1508B_1
Product data sheet
DATA
1 to 0
3 to 2
5 to 4
6
7
Mode
XCVRSELECT[1:0]
TERMSELECT
Fig 10. Single and back-to-back RXCMDs from the ISP1508 to the link
DATA [ 7:0 ]
Name
LINESTATE
V
RxEvent
ID
ALT_INT
BUS
CLOCK
RXCMD byte format
LINESTATE[1:0] encoding for upstream facing ports: peripheral
10.2.2.1 Linestate encoding
NXT
STP
DIR
state
[1]
The ISP1508 will automatically send an RXCMD whenever there is a change in any of the
RXCMD data fields. The link must be able to accept an RXCMD at any time; including
single RXCMDs, back-to-back RXCMDs, and RXCMDs at any time during USB receive
packets when NXT is LOW. An example is shown in
refer to UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1 .
Description and value
LINESTATE signals: For a definition of LINESTATE, see
DATA0 — LINESTATE[0]
DATA1 — LINESTATE[1]
Encoded V
Encoded USB event signals: For an explanation of RxEvent, see
Reflects the value of the ID pin. Valid 50 ms after ID_PULLUP is set to logic 1.
By default, this signal is not used and is not needed in typical designs. Optionally, the link can
enable the BVALID_RISE and/or BVALID_FALL bits in the Power Control register. Corresponding
changes in BVALID will cause an RXCMD to be sent to the link with the ALT_INT bit asserted.
LINESTATE[1:0] reflects the current state of DP and DM. Whenever the ISP1508 detects
a change in DP or DM, an RXCMD will be sent to the link with the new LINESTATE[1:0]
value. The value given on LINESTATE[1:0] depends on the setting of various registers.
Table 17
peripherals.
which applies to Host Controllers. Dual-role devices must choose the correct table,
depending on whether it is in peripheral or host mode.
turnaround
Full-speed
01, 11
1
shows the LINESTATE[1:0] encoding for upstream facing ports, which applies to
BUS
Table 18
voltage state: For an explanation of the V
Single RXCMD
RXCMD
shows the LINESTATE[1:0] encoding for downstream facing ports,
Rev. 01 — 14 August 2007
High-speed
00
0
turnaround
Chirp
00
1
turnaround
ISP1508A; ISP1508B
Section
BUS
Figure
Back-to-back RXCMDs
RXCMD
state, see
10.2.2.1.
10. For details and diagrams,
Section
ULPI HS USB transceiver
RXCMD
Section
10.2.2.4.
© NXP B.V. 2007. All rights reserved.
turnaround
10.2.2.2.
004aaa695
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