ISP1508AET NXP Semiconductors, ISP1508AET Datasheet - Page 9

• 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
7.7 ID
7.8 V
7.9 V
For OTG applications, the ID (identification) pin is connected to the ID pin of the micro-AB
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.
The ISP1508 provides an internal pull-up resistor (R
pin. The pull-up resistor must first be enabled by setting the ID_PULLUP register bit to
logic 1. If the value on ID has changed, the ISP1508 will send an RXCMD or interrupt to
the link. If the link does not receive any RXCMD or interrupt by time t
has not changed.
The ISP1508 also provides an internal weak pull-up resistor (R
pull-up resistor is always enabled to avoid the possible floating condition on the ID pin.
The ID pin can be left open when not in use.
Main input supply voltage for the ISP1508. The ISP1508 operates correctly when V
between 3.0 V and 4.5 V. A 0.1 F decoupling capacitor is recommended.
This I/O pin acts as an input to V
and discharge resistors. For details, see
The V
values for various applications.
Table 4.
Application
OTG
Standard host
Standard peripheral
CC
BUS
BUS
pin requires a capacitive load.
Recommended V
Rev. 01 — 14 August 2007
BUS
capacitor value
BUS
comparators, and also as a power pin for SRP charge
V
1 F to 6.5 F; 10 V
120 F
1 F to 10 F; 10 V
BUS
Figure
Table 4
capacitor (C
ISP1508A; ISP1508B
20 %; 10 V
3.
provides the recommended capacitor
UP(ID)
VBUS
) to sense the value of the ID
)
ULPI HS USB transceiver
weakPU(ID)
ID
, then the ID value
© NXP B.V. 2007. All rights reserved.
). This weak
CC
9 of 86
is