ISP1508AET NXP Semiconductors, ISP1508AET Datasheet - Page 32

• Manufacturer Part Number: ISP1508AET
• Description: RF Transceiver USB 2.0 ULPI TRNSCVR
• Manufacturer: NXP Semiconductors

Specifications of ISP1508AET

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935283548118 ISP1508AET-T

NXP Semiconductors
ISP1508A_ISP1508B_1
Product data sheet
10.2.2.3 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 Interrupt Enable Rising and USB
Interrupt Enable Falling registers.
The link can use the V
shows the recommended usage for typical applications.
Table 20.
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 ISP1508 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
OTG A-device
OTG B-device
1. Set the IND_COMPL bit in the Interface Control register to logic 0 or logic 1,
2. Set the USE_EXT_VBUS_IND bit in the OTG Control register to logic 1.
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,
depending on the polarity of the external fault signal.
comparator, set the IND_PASSTHRU bit in the Interface Control 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
FAULT indicator
Rev. 01 — 14 August 2007
BUS
A_VBUS_VLD
yes
no
yes
no
state to monitor V
BUS
state encoding
internal A_VBUS_VLD
For standard hosts, the system must be able to provide
Table
BUS
Standard peripherals must be able to detect
16. The ISP1508 will send an RXCMD to the
state. To receive V
BUS
ISP1508A; ISP1508B
SESS_VLD
no
yes
yes
yes
complement
and take appropriate action.
output
ULPI HS USB transceiver
BUS
state updates, the link
004aaa698
(0, X)
(1, 0)
(1, 1)
SESS_END
no
no
no
yes
© NXP B.V. 2007. All rights reserved.
RXCMD
A_VBUS_VLD
Table 20
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