Philips ISP1520 - page 14

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 03 — 24 November 2004 14 of 51

9397 750 13701 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.

PSWn_N pins have integrated weak pull-up resistors inside the chip.

9.1.3 Overcurrent protection mode

The ISP1520 supports all overcurrent protection modes: none, global and individual.

No overcurrent protection mode reporting is selected when pin NOOC = HIGH.

Global and individual overcurrentprotection modes are selected using pins PSWn_N,

following the power switching modes selection scheme; seeTa ble 6 .

For the global overcurrent protection mode, only PSW1_N and OC1_N are active;

that is, in this mode, the remaining overcurrent indicator pins are disabled. To inhibit

the analog overcurrent detection, the OC_N pins must be connected to VREF(5V0).

Both analog and digital overcurrent modes are supported; see Tab le 7.

For digital overcurrent detection, the normal digital TTL level is accepted on the

overcurrent input pins. For analog overcurrent detection, the threshold is given in the

DC characteristics. In this mode, to ﬁlter out false overcurrent conditions because of

in rush and spikes, a dead time of 15 ms is built into the IC, that is, overcurrent must

persist for 15 ms before it is reported to the host.

9.1.4 Non-removable port

A non-removable port, by deﬁnition, is a port that is embedded inside the hub

application box and is not externally accessible. The LED port indicators

(pins AMBn_N) of such a port are not used. Therefore, the corresponding amber LED

port indicators are disabled to signify that the port is non-removable; see Tab le 8.

More than one non-removable port can be speciﬁed by appropriately connecting the

corresponding amber LED indicators. At least one port should, however, be left as a

removable port.

Table 5: Power switching mode: pin conﬁguration

Power switching mode PSW1_N PSW2_N PSW3_N PSW4_N

Ganged internal

pull-up ground ground ground

Individual internal

pull-up internal

pull-up internal

pull-up internal

pull-up

Table 6: Overcurrent protection mode pin conﬁguration

Power switching mode NOOC PSW1_N PSW2_N PSW3_N PSW4_N

None HIGH ground ground ground ground

Global LOW internal

pull-up ground ground ground

Individual LOW internal

pull-up internal

pull-up internal

pull-up internal

pull-up

Table 7: Overcurrent detection mode selection pin conﬁguration

Pin ADOC Mode selection Description

3.3 Vor 5.0 V analog threshold ∆Vtrip

Ground digital normal digital TTL level

Contents

Main ISP1520 Hi-Speed Universal Serial Bus hub controller Universal Serial Bus Specication Rev.2.0 Rev. 03 24 November 2004 Product data 1. General description 2. Features Universal Serial Bus Specication Rev.2.0 3. Applications 4. Abbreviations 5. Ordering information Product data Rev. 03 24 November 2004 4 of 51 6. Block diagram Fig 1. Block diagram. ISP1520 Philips Semiconductors ISP1520 Product data Rev. 03 24 November 2004 5 of 51 7. Pinning information ISP1520BD Fig 2. Pin conguration. 7.2 Pin description 7.1 Pinning Page ISP1520 Hub Demo Board Users Guide Page 8. Functional description 8.3 Phase-locked loop clock multiplier 8.4 I2C-bus controller 8.5 Overcurrent detection circuit 8.6 GoodLink 8.7 Power-on reset Fig 4. External clock with respect to power-on reset. Fig 3. Power-on reset timing. Stable external clock is to be available at A. POR EXTERNAL CLOCK A 9. Conguration selections 9.1 Conguration through I/O pins Page Philips Semiconductors ISP1520 9.2 Device descriptors and string descriptors settings using I2C-bus The I C-bus specication Page 9.2.3 ROM or EEPROM map Page Page Philips Semiconductors ISP1520 Page 10. Hub controller description 11. Descriptors Page Page 12. Hub requests Tab le 23 shows the suppor ted standard USB requests. 12.1 Standard USB requests 12.2 Hub class requests Tab le 24 shows the hub class requests. 12.3 Detailed responses to hub requests Page Page 12.4 Various get descriptors bmRequestType 10000000B bmRequest GET_DESCRIPTOR = 6 13. Limiting values 14. Recommended operating conditions In accordance with the Absolute Maximum Rating System (IEC 60134). 15. Static characteristics Page Page 16. Dynamic characteristics C; test circuit Figure 21; unless otherwise specied. Page TPERIOD is the bit duration corresponding with the USB data rate. Fig 11. Source differential data-to-EOP transition skew and EOP width. TPERIOD is the bit duration corresponding with the USB data rate. tJR is the jitter reference point. Fig 13. Receiver SE0 width tolerance. Fig 12. Receiver differential data jitter. Fig 14. Hub differential data delay and SOP distortion. Fig 15. Hub EOP delay and EOP skew. and T within recommended operating range; V 5 V; V =V ; V 17. Application information 17.1 Descriptor conguration selection ISP1520 Fig 18. Adjusting analog overcurrent detection limit (optional). ISP1520 17.3 Self-powered hub congurations ISP1520 Fig 19. Self-powered hub; individual port power switching; individual overcurrent detection. Fig 20. Self-powered hub; ganged port power switching; global overcurrent detection. ISP1520 18. Test information DMn D Fig 22. Full-speed test circuit. Fig 21. High-speed transmitter and receiver test circuit. 19. Package outline LQFP64: plastic low profile quad flat package; 64 leads; body 10 x 10 x 1.4 mm SOT314-2 Fig 23. LQFP64 package outline. c 20. Soldering 20.1 Introduction to soldering surface mount packages Data Handbook IC26; Integrated Circuit Packages 20.2 Reow soldering 20.3 Wave soldering 21. Revision history Contact information 22. Data sheet status 23. Denitions 24. Disclaimers 25. Licenses 26. Trademarks Contents