isp1512a NXP Semiconductors, isp1512a Datasheet - Page 12

• Manufacturer Part Number: isp1512a
• Description: Ulpi Hi-speed Usb Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
ISP1512A_1
Preliminary data sheet
8.10.6 V
8.10.7 REG3V3 and REG1V8
8.10.8 XTAL1 and XTAL2
This I/O pin acts as an input to V
and discharge resistors. For details, see
The V
values for various applications.
Table 4.
These are output voltage pins from the internal regulator. These supplies are used
internally to power digital and analog circuits.
For proper operation of the regulator, pins REG3V3 and REG1V8 must each be
connected to a 0.1 F capacitor in parallel with a 4.7 F low ESR capacitor.
XTAL1 is the crystal oscillator input, and XTAL2 is the crystal oscillator output.
If the link requires a 60 MHz clock from the ISP1512A, then either a crystal must be
attached, or a clock of the same frequency must be driven into XTAL1, with XTAL2 left
unconnected.
If a crystal is attached, it requires a capacitor on each terminal of the crystal to GND. The
values of the maximum series resistance of the crystal and required external capacitors
are given in
Application
OTG
Standard host
Standard peripheral
Fig 4.
BUS
BUS
Internal circuit of the V
pin requires a capacitive load.
Recommended V
Table
5.
V
comparators
Rev. 01 — 31 July 2008
BUS
BUS
capacitor value
BUS
BUS
pin
comparators, and also as a power pin for SRP charge
R UP(VBUS)
R DN(VBUS)
DISCHRG_
VBUS
CHRG_VBUS
V
1 F to 6.5 F, 10 V
120 F
1 F to 10 F, 10 V
BUS
Figure
Table 4
capacitor (C
20 %, 10 V
R I(idle)(VBUS)
4.
provides the recommended capacitor
004aaa871
VBUS
)
ULPI HS USB transceiver
REG3V3
V
BUS
ISP1512A
© NXP B.V. 2008. All rights reserved.
11 of 55