Philips ISP1122 7. Modes of operation

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 I

2

C-bus and how to use it

, order number 9398 393 40011.

7. Modes of operation

The ISP1122 has severalmodes of operation, each corresponding with a different pin

conﬁguration. Modes are selected by means of pins INDV, OPTION and SP/BP, as

shown in Tab le 4.

[1] Port power switching: logic0 = ganged, logic 1 = individual.

[2] Power mode: logic0=bus-powered, logic1 = 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

0000GoodLink ganged power inactive global overcurrent

1001GoodLink ganged power inactive global overcurrent

2010GoodLink ganged power inactive[3] inactive [3]

3011GoodLink[4] GoodLink [4] inactive global overcurrent

4100individual power inactive individual

overcurrent inactive

5101individual power individual power individual

overcurrent individual

overcurrent

6110individual power inactive inactive[3] inactive [3]

7111GoodLink[4] GoodLink [4] individual

overcurrent individual

overcurrent

Contents

Main ISP1122 Universal Serial Bus stand-alone hub Universal Serial Bus Specication Rev. 1.1 USB Specication Rev. 1.1 Rev. 03 29 March 2000 Product specication 3. Ordering information 4. Block diagram This is a conceptual block diagram and does not include each individual signal. th ISP1122 5. Pinning information 5.1 ISP1122D (SO32) and ISP1122NB (SDIP32) Fig 2. Pin conguration SO32. Fig 3. Pin conguration SDIP32. 5.1.2 Pin description 5.1.1 Pinning Page Page 5.2 ISP1122BD (LQFP32) 5.2.1 Pinning Fig 4. Pin conguration LQFP32. 5.2.2 Pin description ISP1122BD Page 6. Functional description 6.1 Analog transceivers USB Specication Rev. 1.1 6.2 Philips Serial Interface Engine (SIE) 6.3 Hub repeater USB Specication Rev. 1.1 6.4 End-of-frame timers 6.5 General and individual port controller 7. Modes of operation Philips Semiconductors ISP1122 8. Endpoint descriptions 8.1 Hub endpoint 0 (control) 8.2 Hub endpoint 1 (interrupt) Philips Semiconductors ISP1122 9. Host requests 9.1 Standard requests 9.2 Hub specic requests Page 9.3 Descriptors The ISP1122 hub controller supports the following standard USB descriptors: USB Specication Rev. 1.1 Page USB Specication Rev. 1.0 9.4 Hub responses Page 10. I2C-bus interface 10.1 Protocol C-bus and how to use it The I 10.2 Hardware connections 10.3 Data transfer Philips Semiconductors ISP1122 11. Hub power modes USB Specication Rev.1.1 11.1 Voltage drop requirements 12. Overcurrent detection 12.1 Overcurrent circuit description 12.2 Power switch selection 12.3 Tuning the overcurrent trip voltage 12.4 Reference circuits Power switches 1 to 5 are low-ohmic PMOS devices as specied inSection 12.2. ISP1122 Fig 10. Mode 5: self-powered hub; individual port power switching; individual overcurrent detection. Power switch is low-ohmic PMOS device as specied inSection 12.2. Fig 11. Mode 1: self-powered hub; ganged port power switching; global overcurrent detection. Power switches 1 to 4 are low-ohmic PMOS devices as specied inSection 12.2. Fig 12. Mode 4: bus-powered hub; individual port power switching; individual overcurrent detection. Product specication Rev. 03 29 March 2000 29 of 48 Power switch is low-ohmic PMOS device as specied inSection 12.2. Fig 13. Mode 0: bus-powered hub; ganged port power switching; global overcurrent detection. 13. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). 14. Static characteristics 15. Dynamic characteristics =0V;T on D = 1.5 k C; C = 50 pF; R =0V;T on D = 1.5 k C; C = 50 pF; R Fig 15. Source differential data jitter. Fig 16. Source differential data-to-EOP transition skew and EOP width. Fig 17. Receiver differential data jitter. Fig 18. Receiver SE0 width tolerance. Fig 19. Hub differential data delay and SOP distortion. [1] fSCL =164fXTAL. [2] Rise time is determined by Cb and pull-up resistor value Rp (typ. 4.7 k). Fig 20. Hub EOP delay and EOP skew. DD SS IH IL 16. Test information Fig 22. Load impedance for D+ and D- pins. Fig 21. I2C-bus timing. 17. Package outline Fig 23. SO32 package outline. SO32: plastic small outline package; 32 leads; body width 7.5 mm SOT287-1 SDIP32: plastic shrink dual in-line package; 32 leads (400 mil) SOT232-1 Fig 24. SDIP32 package outline. LQFP32: plastic low profile quad flat package; 32 leads; body 7 x 7 x 1.4 mm SOT358-1 Fig 25. LQFP32 package outline. c 18. Soldering 18.1 Introduction Data Handbook IC26; Integrated Circuit Packages 18.2 Surface mount packages 18.3 Through-hole mount packages 18.4 Package related soldering information 19. Revision history 20. Data sheet status 21. Denitions 22. Disclaimers 23. Licenses 24. Trademarks Philips Semiconductors - a worldwide company Internet: http://www.semiconductors.philips.com Contents