isp1504a1 NXP Semiconductors, isp1504a1 Datasheet - Page 11

• Manufacturer Part Number: isp1504a1
• Description: Isp1504a1; Isp1504c1 Ulpi Hi-speed Universal Serial Bus On-the-go Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ISP1504A1_ISP1504C1_1
Product data sheet
7.9.4 DP and DM
7.9.5 FAULT
7.9.6 ID
7.9.7 V
7.9.8 PSW_N
7.9.9 V
DP (data plus) and DM (data minus) are USB differential data pins. These must be
connected to the D+ and D pins of the USB receptacle.
If an external V
circuit can be connected to the ISP1504x1 FAULT input pin. The ISP1504x1 will inform the
link of V
link must set the USE_EXT_VBUS_IND register bit to logic 1, and the polarity of the
external fault signal must be set using the IND_COMPL register bit.
For OTG implementations, the ID (identification) pin is connected to the ID pin of the
micro-USB receptacle. As defined in On-The-Go Supplement to the USB 2.0 Specification
Rev. 1.2 , the ID pin dictates the initial role of the link. If ID is detected as HIGH, the link
must assume the role of a peripheral. If ID is detected as LOW, the link must assume a
host role. Roles can be swapped at a later time by using HNP.
If the ISP1504x1 is not used as an OTG PHY, but as a standard USB host or peripheral
PHY, it is recommended to connect the ID pin to REG3V3.
V
recommended. For details, see
PSW_N is an active LOW, open-drain output pin. This pin can be connected to an active
LOW, external V
power source.
If the link is in host mode, it can enable the external power switch by setting the
DRV_VBUS_EXT bit in the OTG Control register to logic 1. The ISP1504x1 will drive
PSW_N to LOW to enable the external switch. If the link detects an overcurrent condition
(the V
DRV_VBUS_EXT to logic 0.
An external pull-up resistor, R
open-drain, allowing ganged mode power control for multiple USB ports.
This pin acts as an input to V
and discharge resistors.
The V
various applications.
CC
CC
BUS
is the main input supply voltage for the ISP1504x1. A 0.1 F decoupling capacitor is
BUS
BUS
BUS
state in RXCMD is not 11b), it must disable the external V
pin requires a capacitive load.
fault events by sending RXCMDs on the ULPI bus. To use the FAULT pin, the
BUS
BUS
overcurrent or fault circuit is used, the output fault indicator of that
switch or charge pump enable circuit to control the external V
Rev. 01 — 6 August 2007
BUS
pullup
Section
comparators, and also as a power pin for SRP charge
, is required when PSW_N is used. This pin is
15.
ISP1504A1; ISP1504C1
Table 3
provides the recommended capacitor for
ULPI HS USB OTG transceiver
BUS
© NXP B.V. 2007. All rights reserved.
supply by setting
BUS
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