ISP1505ABS STEricsson, ISP1505ABS Datasheet - Page 13

• Manufacturer Part Number: ISP1505ABS
• Manufacturer: STEricsson

Specifications of ISP1505ABS

• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
ISP1505A_ISP1505C_3
Product data sheet
7.10.10 DIR
7.10.11 STP
7.10.12 NXT
7.10.13 CLOCK
7.10.14 GND (die pad)
ULPI direction output pin. Controls the direction of the data bus. By default, the ISP1505
holds DIR at LOW, causing the data bus to be an input. When DIR is LOW, the ISP1505
listens for data from the link. The ISP1505 pulls DIR to HIGH only when it has data to
send to the link, which is for one of two reasons:
For details on DIR usage, refer to UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1 .
ULPI stop input pin. The link must assert STP to signal the end of a USB transmit packet
or a register write operation. When DIR is asserted, the link can optionally assert STP to
abort the ISP1505, causing it to deassert DIR in the next clock cycle. A weak pull-up
resistor is incorporated into the STP pin as part of the interface protect feature. For details,
see
For details on STP usage, refer to UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1 .
ULPI next data output pin. The ISP1505 holds NXT at LOW, by default. When DIR is LOW
and the link is sending data to the ISP1505, NXT will be asserted to notify the link to
provide the next data byte. When DIR is at HIGH and the ISP1505 is sending data to the
link, NXT will be asserted to notify the link that another valid byte is on the bus. NXT is not
used for the register read data or the RXCMD status update.
For details on NXT usage, refer to UTMI+ Low Pin Interface (ULPI) Specification Rev. 1.1 .
A 60 MHz interface clock to synchronize the ULPI bus. The ISP1505 provides two
clocking options:
For details on CLOCK usage, refer to UTMI+ Low Pin Interface (ULPI) Specification
Rev. 1.1 .
Global ground signal. The die pad is exposed on the underside of the package as a
ground plate. This acts as a ground to all circuits in the ISP1505. To ensure correct
operation of the ISP1505, GND must be soldered to the cleanest ground available.
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To send the USB receive data, RXCMD status updates and register reads data to the
link.
To block the link from driving the data bus during power-up, reset and low-power
mode (suspend).
A crystal is attached between the XTAL1 and XTAL2 pins.
A clock is driven into the XTAL1 pin, with the XTAL2 pin left floating.
Section
9.3.1.
Rev. 03 — 26 August 2008
ULPI HS USB host and peripheral transceiver
ISP1505A; ISP1505C
© NXP B.V. 2008. All rights reserved.
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