Philips cmos digital decoding ic with ram for compact disc data sheet (40 pages)
Summary of Contents for Philips ISP1520
Rev. 04.00 — 11 May 2004 Semiconductors Document information Info Keywords Abstract User manual Content ISP1520, hub controller, USB, universal serial bus This document describes the ISP1520 hub demo board. It also contains the related schematics, the PCB layout, and the Bill of Material...
April 14, 2004 Feb 2003 Nov. 2002 Contact information For additional information, please visit: http://www.semiconductors.philips.com/ For sales office addresses, please send an email to: email@example.com User manual ISP1520 Hi-Speed USB Hub Demo Board Description Updated the schematic. Updated the following: •...
UM10014_4 Philips Semiconductors ISP1520 Hi-Speed USB Hub Demo Board This is a legal agreement between you (either an individual or an entity) and Philips Semiconductors. By accepting this product, you indicate your agreement to the disclaimer specified as follows: DISCLAIMER PRODUCT IS DEEMED ACCEPTED BY RECIPIENT.
References... 18 GoodLink and I C-Bus are trademarks of Koninklijke Philips Electronics N.V. Microsoft is a registered trademark of Microsoft Corp. The names of actual companies and products mentioned herein may be the trademarks of their respective owners. All other names, products, and trademarks are the property of their respective owners.
Philips Semiconductors 1. Introduction The ISP1520 is a Hi-Speed Universal Serial Bus (USB) hub IC, with four downstream facing ports. The ISP1520 Hub demo board is designed to demonstrate the features and functionality of the ISP1520. This version is targeted at low-cost designs. Nevertheless, it still contains a large number of features and options to be evaluated.
Philips Semiconductors 5.2. GoodLink Indicator A Philips GoodLink LED D15 (red) is located near the upstream facing port. This LED blinks on every successful USB transaction. 5.3. Port Power Switch Transistors The hub switches the bus power of each downstream facing port through a low ohmic PMOS transistor.
This hub demo board can be used as a self-powered USB hub. When used as a self-powered hub, use the provided power supply. The SW1 switch sets the powering mode in the hub’s descriptors; see Table 5-4. User manual Overcurrent Detection...
Table 5-4: Power Mode Selection Using SW1 5.6. C-Bus Interface The ISP1520 can use either its USB descriptors from the internal ROM, or from an external I EEPROM or microcontroller. Mode selection is done through jumpers J1and J2 (see Table 5-5:).