ISP1504A1ETTM STEricsson, ISP1504A1ETTM Datasheet - Page 8

• Manufacturer Part Number: ISP1504A1ETTM
• Manufacturer: STEricsson

Specifications of ISP1504A1ETTM

• Lead Free Status / RoHS Status: Compliant

CD00222688
Product data sheet
7.4 Voltage regulator
7.5 Crystal oscillator and PLL
7.6 OTG module
For details on controlling resistor settings, see
The ISP1504x1 contains a built-in voltage regulator that conditions the V
inside the ISP1504x1. The voltage regulator:
To save current, the voltage regulator will be shut down, if V
pin CS_N/PWRDN is at a HIGH level.
Remark: The REG1V8 and REG3V3 pins require an external 0.1 μF capacitor in parallel
with a 4.7 μF capacitor. For details, see
The ISP1504x1 has a built-in crystal oscillator and a Phase-Locked Loop (PLL) for clock
generation.
The crystal oscillator takes a sine-wave input from an external crystal, on the XTAL1 pin,
and converts it to a square wave clock for internal use. Alternatively, a square wave clock
of the same frequency can also be directly driven into the XTAL1 pin. Using an existing
square wave clock can save the cost of the crystal and also reduce the board size. The
input clock or crystal frequency supported is 19.2 MHz or 26 MHz.
The PLL produces the following frequencies, irrespective of the clock source:
This module contains several sub-blocks that provide all the functionality required by the
USB OTG specification. Specifically, it provides the following circuits:
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Differential and single-ended receivers to receive data at high-speed, full-speed and
low-speed
Squelch circuit to detect high-speed bus activity
High-speed disconnect detector
45 Ω high-speed bus terminations on DP and DM
1.5 kΩ pull-up resistor on DP
15 kΩ pull-down resistor on DP and DM
Supports input supply range of 3.0 V < V
Can be supplied from a battery with a voltage range of 3.0 V to 4.5 V
Supplies internal circuitry with 1.8 V and 3.3 V
Automatically bypasses the internal 3.3 V regulator when V
directly from the V
60 MHz clock for the ULPI interface controller
1.5 MHz for the low-speed USB data
12 MHz for the full-speed USB data
480 MHz for the high-speed USB data
Other internal frequencies for data conversion and data recovery
CC
Rev. 04 — 20 May 2010
pin
Section
ISP1504A1; ISP1504C1
CC
Table
< 4.5 V
15.
8.
ULPI HS USB OTG transceiver
CC(I/O)
CC
< 3.5 V, drawing power
is not present or if
© ST-ERICSSON 2010. All rights reserved.
CC
supply for use
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