isp1507a NXP Semiconductors, isp1507a Datasheet - Page 30

• Manufacturer Part Number: isp1507a
• Description: Lpi Hi-speed Universal Serial Bus On-the-go Transceive
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ISP1507A_ISP1507B_1
Product data sheet
9.5.2.3 Using and selecting the V
The V
link whenever there is a change in the V
must first enable the corresponding interrupts in the USB_INTR_EN_R_E and
USB_INTR_EN_F_E registers.
The link can use the V
shows the recommended usage for typical applications.
Table 15.
Standard USB host controllers:
500 mA on V
detect overcurrent conditions. If the external overcurrent detector provides a digital fault
signal, then the fault signal must be connected to the ISP1507 FAULT input pin, and the
link must do the following:
Standard USB peripheral controllers:
when V
start and end of USB peripheral operations. Detection of A_VBUS_VLD and SESS_END
thresholds is not needed for standard peripherals.
Application
Standard host
Standard peripheral no
OTG A-device
OTG B-device
1. Set the IND_COMPL bit in the INTF_CTRL register (see
2. Set the USE_EXT_VBUS_IND bit in the OTG_CTRL register (see
3. If it is not necessary to qualify the fault indicator with the internal A_VBUS_VLD
Fig 11. RXCMD A_VBUS_VLD indicator source
USE_EXT_VBUS_IND,
logic 1, depending on the polarity of the external fault signal.
logic 1.
comparator, set the IND_PASSTHRU bit in the INTF_CTRL register to logic 1.
BUS
IND_PASSTHRU
BUS
IND_COMPL
state encoding is shown in
V
is at a sufficient level for operation. SESS_VLD must be enabled to detect the
BUS
BUS
FAULT
V
indicators in RXCMD required for typical applications
BUS
in the range of 4.75 V to 5.25 V. An external circuit must be used to
A_VBUS_VLD comparator
A_VBUS_VLD
yes
yes
no
FAULT indicator
BUS
Rev. 01 — 19 May 2008
state to monitor V
BUS
state encoding
internal A_VBUS_VLD
For standard hosts, the system must be able to provide
Table
BUS
SESS_VLD
no
yes
yes
yes
Standard peripherals must be able to detect
11. The ISP1507 will send an RXCMD to the
state. To receive V
BUS
ISP1507A; ISP1507B
complement
and take appropriate action.
output
ULPI HS USB OTG transceiver
SESS_END
no
no
no
yes
Section
BUS
state updates, the link
004aaa698
(0, X)
(1, 0)
(1, 1)
10.1.3) to logic 0 or
Section
© NXP B.V. 2008. All rights reserved.
RXCMD
A_VBUS_VLD
Table 15
10.1.4) to
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