isp1505a NXP Semiconductors, isp1505a Datasheet - Page 42

• Manufacturer Part Number: isp1505a
• Description: Isp1505a; Isp1505c Ulpi Hi-speed Universal Serial Bus Host And Peripheral Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ISP1505A_ISP1505C_1
Product data sheet
9.12.1 OTG comparators
9.12.2 Pull-up and pull-down resistors
9.12.3 V
9.13 Serial modes
The ISP1505 provides comparators that conform to On-The-Go Supplement to the
USB 2.0 Specification Rev. 1.2 requirements of V
and V
V
are communicated to the link by RXCMDs as described in
comparators is described in
The USB resistors on DP and DM can be used to initiate data-line pulsing SRP. The link
must set the required bus state using mode settings given in
A pull-up resistor, R
allowed to charge V
the V
A pull-down resistor, R
whenever the A-device turns off the V
resistor to ensure V
For details, refer to On-The-Go Supplement to the USB 2.0 Specification Rev. 1.2 .
The ISP1505 supports both 6-pin serial mode and 3-pin serial mode, controlled by
bits 6PIN_FSLS_SERIAL and 3PIN_FSLS_SERIAL of the Interface Control register. For
details, refer to UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1 , Section 3.10.
Figure 18
respectively.
B_SESS_VLD
BUS
BUS
B_SESS_END
charge and discharge resistors
power.
and
. Comparators are described in
Figure 19
. In this data sheet, V
BUS
UP(VBUS)
BUS
Rev. 01 — 19 October 2006
DN(VBUS)
is below V
above the session valid threshold to request the host to turn on
provide examples of 6-pin serial mode and 3-pin serial mode,
, is provided to perform V
Section 10.1.5
, is provided for a B-device to discharge V
B_SESS_END
BUS
A_SESS_VLD
ULPI HS USB host and peripheral transceiver
power; the B-device can use the pull-down
to
Section
ISP1505A; ISP1505C
before starting a session.
Section
A_VBUS_VLD
and V
7.6. Changes in comparator values
BUS
10.1.8.
B_SESS_VLD
pulsing SRP. A B-device is
Section
, V
Table
A_SESS_VLD
9.5.2.2. Control over
7.
are combined into
© NXP B.V. 2006. All rights reserved.
BUS
, V
. This is done
B_SESS_VLD
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