Electronic Components Datasheet Search |
|
ISP1122NB Datasheet(PDF) 10 Page - NXP Semiconductors |
|
ISP1122NB Datasheet(HTML) 10 Page - NXP Semiconductors |
10 / 48 page Philips Semiconductors ISP1122 USB stand-alone hub Product specification Rev. 03 — 29 March 2000 10 of 48 9397 750 07002 © Philips Electronics N.V. 2000. All rights reserved. 6.9 PLL clock multiplier A 6 to 48 MHz clock multiplier Phase-Locked Loop (PLL) is integrated on-chip. This allows for the use of low-cost 6 MHz crystals. The low crystal frequency also minimizes Electro-Magnetic Interference (EMI). The PLL requires no external components. 6.10 Overcurrent detection An overcurrent detection circuit for downstream ports has been integrated on-chip. It is self-reporting, resets automatically, has a low trip time and requires no external components. Both individual and global overcurrent detection are supported. 6.11 I2C-bus interface A basic serial I2C-bus interface (single master, 100 kHz) is provided to read VID, PID and configuration bits from an external I2C-bus EEPROM (e.g. Philips PCF8582 or equivalent). At reset the ISP1122 reads 6 bytes of data from the external memory. The I2C-bus interface timing complies with the standard mode of operation as described in The I2C-bus and how to use it, order number 9398 393 40011. 7. Modes of operation The ISP1122 has several modes of operation, each corresponding with a different pin configuration. Modes are selected by means of pins INDV, OPTION and SP/BP, as shown in Table 4. [1] Port power switching: logic 0 = ganged, logic 1 = individual. [2] Power mode: logic0=bus-powered, logic 1 = self-powered (or hybrid-powered). [3] No overcurrent detection. [4] No power switching. Table 4: Mode selection Mode INDV [1] OPTION SP/BP [2] PSWn/GLn (n = 1 to 4) PSW5/GL5/GPSW OCn (n = 1 to 4) OC5/GOC 0000 GoodLink ganged power inactive global overcurrent 1001 GoodLink ganged power inactive global overcurrent 2010 GoodLink ganged power inactive [3] inactive [3] 3011 GoodLink [4] GoodLink [4] inactive global overcurrent 4100 individual power inactive individual overcurrent inactive 5101 individual power individual power individual overcurrent individual overcurrent 6110 individual power inactive inactive [3] inactive [3] 7111 GoodLink [4] GoodLink [4] individual overcurrent individual overcurrent |
Similar Part No. - ISP1122NB |
|
Similar Description - ISP1122NB |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |