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ISP1581
Datasheet
General description
The ISP1581 is a cost-optimized and feature-optimized Hi-Speed Universal Serial Bus (USB) peripheral controller, which fully complies with the Universal Serial Bus Specification Rev. 2.0. It provides high-speed USB communication capacity to systems based on a microcontroller or microprocessor. The ISP1581 communicates with the system's microcontroller/processor through a high-speed general-purpose parallel interface.
The ISP1581 supports automatic detection of Hi-Speed USB system operation. The Original USB fall-back mode allows the device to remain operational under full-speed conditions. It is designed as a generic USB peripheral controller so that it can fit into all existing device classes, such as: Imaging Class, Mass Storage Devices, Communication Devices, Printing Devices and Human interface devices.
The internal generic DMA block allows easy integration into data streaming applications. In addition, the various configurations of the DMA block are tailored for mass storage applications.
The modular approach to implementing a USB peripheral controller allows the designer to select the optimum system microcontroller from the wide variety available. The ability to re-use existing architecture and firmware investments shortens the development time, eliminates risk and reduces costs. The result is fast and efficient development of the most cost-effective USB peripheral solution.
The ISP1581 is ideally suited for many types of peripherals, such as: printers; scanners; magneto-optical (MO), compact disc (CD), digital video disc (DVD) and Zip® /Jaz® drives; digital still cameras; USB-to-Ethernet links; cable and DSL modems. The low power consumption during 'suspend' mode allows easy design of equipment that is compliant to the ACPIâ¢, OnNow⢠and USB power management requirements.
The ISP1581 also incorporates features such as SoftConnectâ¢, a reduced frequency crystal oscillator and integrated termination resistors. These features allow significant cost savings in system design and easy implementation of advanced USB functionality into PC peripherals.
Features
- Direct interface to ATA/ATAPI peripherals; applicable only in the split bus mode
- Complies fully with Universal Serial Bus Specification Rev. 2.0
- Complies with most Device Class specifications
- High performance USB peripheral controller with integrated Serial Interface Engine (SIE), PIE, FIFO memory, data transceiver and 3.3 V voltage regulators
- Supports automatic Hi-Speed USB mode detection and Original USB fall-back mode
- High-speed DMA interface (12.8 Mword/s)
- Fully autonomous and multi-configuration DMA operation
- 7 IN endpoints, 7 OUT endpoints and a fixed control IN/OUT endpoint
- Integrated physical 8 kbyte of multi-configuration FIFO memory
- Endpoints with double buffering to increase throughput and ease real-time data transfer
- Bus independent interface with most microcontroller/microprocessors (12.5 Mbyte/s)
- 12 MHz crystal oscillator with integrated PLL for low EMI
- Integrated 5 V-to-3 V built-in voltage regulator
- Software controlled connection to the USB bus (SoftConnectâ¢)
- Complies with the ACPIâ¢, OnNow⢠and USB power management requirements
- Internal power-on and low-voltage reset circuit, also supporting a software reset
- Operation over the extended USB bus voltage range (4.0 to 5.5 V) with 5 V tolerant I/O pads
- Operating temperature range -40 to +85 Cel
- Available in LQFP64 package.
Applications
- Personal Digital Assistant (PDA)
- Mass storage device, for example: Zip® , Jaz® , MO, CD, DVD drive
- Digital Video Camera
- Digital Still Camera
- 3G mobile phone
- MP3 player
- Communication device, for example: router, modem
- Printer
- Scanner.
Related applications
Motherboard components
Technical documents
Application Notes
AN10002-01;
Power-Up Considerations in ISP1581 (27-Feb-02)
AN10004_4;
ISP1581 Programming Guide (01-Mar-04)
Support Documents
75015937;
NXP USB products (01-Feb-07)
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