ISP1520BD - Philips Semiconductors / NXP Semiconductors

ISP1520

Hi-Speed Universal Serial Bus hub controller

Rev. 02 — 04 May 2004 Product data

1. General description

The ISP1520 is a stand-alone Universal Serial Bus (USB) hub controller IC that

complies with

Universal Serial Bus Speciﬁcation Rev. 2.0

. It supports data transfer at

high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s).

The upstream facing port can be connected to a Hi-Speed USB host or hub or to an

Original USB host or hub. If the upstream facing port is connected to a Hi-Speed USB

host or hub, then the ISP1520 will operate as a Hi-Speed USB hub. That is, it will

support high-speed, full-speed and low-speed devices connected to its downstream

facing ports. If the upstream facing port is connected to an Original USB host or hub,

then the ISP1520 will operate as an Original USB hub. That is, high-speed devices

that are connected to its downstream facing ports will operate in full-speed mode

instead.

The ISP1520 is a full hardware USB hub controller. All Original USB devices

connected to the downstream facing ports are handled using a single Transaction

Translator (TT), when operating in a cross-version environment. This allows the

whole 480 Mbit/s upstream bandwidth to be shared by all the Original USB devices

on its downstream facing ports.

The ISP1520 has four downstream facing ports. If not used, ports 3 and 4 can be

disabled. The vendor ID, product ID and string descriptors on the hub are supplied by

the internal ROM; they can also be supplied by an external I2C-bus™ EEPROM or a

microcontroller.

The ISP1520 IC is suitable for self-powered hub designs.

An analog overcurrent detection circuitry is built into the ISP1520, which can also

accept digital overcurrent signals from external circuits; for example, Micrel MOSFET

switch MIC2026. The circuitry can be conﬁgured to trip on a global or an individual

overcurrent condition.

Each port comes with two status indicator LEDs.

Target applications of the ISP1520 are monitor hubs, docking stations for notebooks,

internal USB hub for motherboards, hub for extending Intel® Easy PCs, hub boxes,

and so on.

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 2 of 51

2. Features

■Complies with:

◆

Universal Serial Bus Speciﬁcation Rev. 2.0

◆Advanced Conﬁguration and Power Interface (ACPI™), OnNow™ and USB

power management requirements.

■Supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and

low-speed (1.5 Mbit/s)

■Self-powered capability

■USB suspend mode support

■Conﬁgurable number of ports

■Internal power-on reset and low voltage reset circuit

■Port status indicators

■Integrates high performance USB interface device with hub handler, Philips Serial

Interface Engine (SIE) and transceivers

■Built-in overcurrent detection circuit

■Individual or ganged power switching, individual or global overcurrent protection,

and non-removable port support by I/O pins conﬁguration

■Simple I2C-bus (master/slave) interface to read device descriptor parameters,

language ID, manufacturer ID, product ID, serial number ID and string descriptors

from a dedicated external EEPROM, or to allow the microcontroller to set up hub

descriptors

■Visual USB trafﬁc monitoring (GoodLink™) for the upstream facing port

■Uses 12 MHz crystal oscillator with on-chip Phase-Locked Loop (PLL) for low

ElectroMagnetic Interference (EMI)

■Full industrial operating temperature range from 0 °Cto70°C

■Available in LQFP64 package.

3. Applications

■Monitor hubs

■Docking stations for notebooks

■Internal hub for USB motherboards

■Hub for extending Easy PCs

■Hub boxes.

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 3 of 51

4. Abbreviations

ACPI — Advanced Conﬁguration and Power Interface

EMI — ElectroMagnetic Interference

ESD — ElectroStatic Discharge

NAK — Not AcKnowledge

PID — Packet Identiﬁer

PLL — Phase-Locked Loop

SIE — Serial Interface Engine

TT — Transaction Translator

USB — Universal Serial Bus.

5. Ordering information

Table 1: Ordering information

Type number Package

Name Description Version

ISP1520BD LQFP64 plastic low proﬁle quad ﬂat package; 64 leads; body

10 ×10 ×1.4 mm SOT314-2

xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx

xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx

xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 4 of 51

6. Block diagram

Fig 1. Block diagram.

004aaa169

I2C-BUS

CONTROLLER

POWER

SWITCH

OVERCURRENT

DETECTION

LINK LEDS LINK LEDS

BIT CLOCK

RECOVERY

PLL

ANALOG

TRANSCEIVER

• ORIGINAL USB

• HI-SPEED USB

ROUTING LOGIC

PHILIPS PIE

PHILIPS SIE

PORT

CONTROLLER

HUB

CONTROLLER

RAM

ROM

MINI-HOST

CONTROLLER

HUB REPEATER

• ORIGINAL USB

• HI-SPEED USB

ANALOG TRANSCEIVER

• ORIGINAL USB

• HI-SPEED USB

TRANSACTION

TRANSLATOR

VCC1

RPU DM0 DP0

SDA

ADOC

NOOC

SUSPEND

SCL

I2C-bus

12 MHz

upstream port 0

XTAL1 XTAL2

RREF

VCC2

VCC3

VCC4

VREF(5V0)

POWER

SWITCH

OVERCURRENT

DETECTION

ANALOG

TRANSCEIVER

• ORIGINAL USB

• HI-SPEED USB

downstream

port 1 downstream

port 2 to port 3 downstream

port 4

DM4

DM1 DP1

OC1_N

PSW1_N

GRN1_N

AMB1_N DP4

ISP1520

OC4_N

PSW4_N

GRN4_N

AMB4_N

15 16 19 20 60 61 47 48 25 26 50 51

GND

RESET_N

HUBGL_N

PORT 1 PORT 4PORT 2 to 3

34334375

9, 39

13, 45

23, 57

11, 41

24, 56

TEST_HIGH

8, 12,

18, 38

2, 6, 10,

14, 21,

22, 35,

40, 42,

46, 58,

TEST_HIGH 17

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 5 of 51

7. Pinning information

7.1 Pinning

7.2 Pin description

Fig 2. Pin conﬁguration.

004aaa164

ISP1520BD

DM4

GND

VCC2

50 GRN4_N

NOOC

SUSPEND

GND

DM0

DP0

RPU

GND

TEST_HIGH

VCC1

VCC4

TEST_HIGH

RREF

GND

DM1

DP1

TEST_LOW

TEST_HIGH

PSW1_N

VCC2 DM2

GND

XTAL2

XTAL1

DP3

DM3

GND

VCC1

TEST_HIGH

DP2

VCC4

DP4

OC1_N

GND

VCC3

VREF(5V0)

OC4_N

PSW4_N

OC3_N

PSW3_N

OC2_N

PSW2_N

RESET_N

ADOC

AMB4_N

GRN3_N

AMB3_N

GRN2_N

AMB2_N

VCC3

VREF(5V0)

GND

GRN1_N

AMB1_N

HUBGL_N

SCL

SDA

Table 2: Pin description[1]

Symbol[2] Pin Type Description

SUSPEND 1 O suspend indicator output; HIGH indicates that the hub is in

the suspend mode

GND 2 - ground supply

DM0 3 AI/O upstream facing port D− connection (analog)

DP0 4 AI/O upstream facing port D+ connection (analog)

RPU 5 AI pull-up resistor connection; connect this pin through a

resistor of 1.5 kΩ±5 % to 3.3 V

GND 6 - ground supply

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 6 of 51

RREF 7 AI reference resistor connection; connect this pin through a

resistor of 12 kΩ±1 % to an analog band gap ground

reference

TEST_HIGH 8 - test pin; connect to 3.3 V

VCC1 9 - analog supply voltage 1 (3.3 V)

GND 10 - ground supply

VCC4 11 - crystal and PLL supply voltage 4 (3.3 V)

TEST_HIGH 12 - test pin; connect to 3.3 V

VCC2 13 - transceiver supply voltage 2 (3.3 V)

GND 14 - ground supply

DM1 15 AI/O downstream facing port 1 D− connection (analog)[3]

DP1 16 AI/O downstream facing port 1 D+ connection (analog)[3]

TEST_LOW 17 - connect to GND

TEST_HIGH 18 - connect to +5.0 V through a 10 kΩ resistor

OC1_N 19 AI/I overcurrent sense input for downstream facing port 1

(analog/digital)

PSW1_N 20 I/O output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 1

input — function of the pin when used as an input is given in

Table 5

GND 21 - ground supply

GND 22 - ground supply

VCC3 23 - digital supply voltage 3 (3.3 V)

VREF(5V0) 24 - reference voltage (5 V ±5 %); used to power internal pull-up

resistors of PSWn_N pins and also for the analog

overcurrent detection

OC4_N 25 AI/I overcurrent sense input for downstream facing port 4

(analog/digital)

PSW4_N 26 I/O output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 4

input — function of the pin when used as an input is given in

Table 5

OC3_N 27 AI/I overcurrent sense input for downstream facing port 3

(analog/digital)

PSW3_N 28 I/O output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 3

input — function of the pin when used as an input is given in

Table 5

OC2_N 29 AI/I overcurrent sense input for downstream facing port 2

(analog/digital)

PSW2_N 30 I/O output — power switch control output (open-drain) with an

internal pull-up resistor for downstream facing port 2

input — function of the pin when used as an input is given in

Table 5

Table 2: Pin description[1]

…continued

Symbol[2] Pin Type Description

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 7 of 51

RESET_N 31 I asynchronous reset input; when reset is active, the internal

switch to the 1.5 kΩ external resistor is opened, and all pins

DPn and DMn are three-state; it is recommended that you

connect to VBUS through an RC circuit; refer to the

schematics in the

ISP1520 Hub Demo Board User’s Guide

ADOC 32 I analog or digital overcurrent detect selection input; a LOW

selects the digital mode and a HIGH (3.3 V) selects the

analog mode

XTAL1 33 I crystal oscillator input (12 MHz)

XTAL2 34 O crystal oscillator output (12 MHz)

GND 35 - ground supply

DM2 36 AI/O downstream facing port 2 D− connection (analog)[3]

DP2 37 AI/O downstream facing port 2 D+ connection (analog)[3]

TEST_HIGH 38 - test pin; connect to 3.3 V

VCC1 39 - analog supply voltage 1 (3.3 V)

GND 40 - ground supply

VCC4 41 - crystal and PLL supply voltage 4 (3.3 V)

GND 42 - ground supply

DM3 43 AI/O downstream facing port 3 D− connection (analog)[4]

DP3 44 AI/O downstream facing port 3 D+ connection (analog)[4]

VCC2 45 - transceiver supply voltage 2 (3.3 V)

GND 46 - ground supply

DM4 47 AI/O downstream facing port 4 D− connection (analog)[4]

DP4 48 AI/O downstream facing port 4 D+ connection (analog)[4]

NOOC 49 I no overcurrent protection selection input; connect this pin to

HIGH (3.3 V) to select no overcurrent protection; if no

overcurrent is selected, all OCn_N pins must be connected

to VREF(5V0)

GRN4_N 50 I/O output — green LED port indicator (open-drain) for

downstream facing port 4

input — function of the pin when used as an input is given in

Table 9

AMB4_N 51 I/O output — amber LED port indicator (open-drain) for

downstream facing port 4

input — function of the pin when used as an input is given in

Table 8

GRN3_N 52 I/O output — green LED port indicator (open-drain) for

downstream facing port 3

input — function of the pin when used as an input is given in

Table 9

AMB3_N 53 I/O output — amber LED port indicator (open-drain) for

downstream facing port 3

input — function of the pin when used as an input is given in

Table 8

Table 2: Pin description[1]

…continued

Symbol[2] Pin Type Description

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 8 of 51

[1] The maximum current the ISP1520 can sink on a pin is 8 mA.

[2] Symbol names ending with underscore N (for example, NAME_N) represent active LOW signals.

[3] Downstream ports 1 and 2 cannot be disabled.

[4] To disable a downstream port n, connect both pins DPn and DMn to VCC (3.3 V); unused ports must

be disabled in reverse order starting from port 4.

GRN2_N 54 I/O output — green LED port indicator (open-drain) for

downstream facing port 2

input — function of the pin when used as an input is given in

Table 9

AMB2_N 55 I/O output — amber LED port indicator (open-drain) for

downstream facing port 2

input — function of the pin when used as an input is given in

Table 8

VREF(5V0) 56 - reference voltage (5 V ±5 %); used to power internal pull-up

resistors of PSWn_N pins and also for the analog

overcurrent detection

VCC3 57 - digital supply voltage 3 (3.3 V)

GND 58 - ground supply

GND 59 - ground supply

GRN1_N 60 I/O output — green LED port indicator (open-drain) for

downstream facing port 1

input — function of the pin when used as an input is given in

Table 9

AMB1_N 61 I/O output — amber LED port indicator (open-drain) for

downstream facing port 1

input — function of the pin when used as an input is given in

Table 8

HUBGL_N 62 O hub GoodLink LED indicator output; the LED is off until the

hub is conﬁgured; a transaction between the host and the

hub will blink the LED off for 100 ms; this LED is off in the

suspend mode (open-drain)

SCL 63 I/O I2C-bus clock (open-drain); see Table 11

SDA 64 I/O I2C-bus data (open-drain); see Table 11

Table 2: Pin description[1]

…continued

Symbol[2] Pin Type Description

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 9 of 51

8. Functional description

8.1 Analog transceivers

The integrated transceivers directly interface to USB lines. They can transmit and

receive serial data at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed

(1.5 Mbit/s).

8.2 Hub controller core

The main components of the hub core are:

•Philips Serial Interface Engine (SIE)

•Routing logic

•Transaction Translator (TT)

•Mini-host controller

•Hub repeater

•Hub controller

•Port controller

•Bit clock recovery.

8.2.1 Philips serial interface engine

The Philips SIE implements the full USB protocol layer. It is completely hardwired for

speed and needs no ﬁrmware intervention. The functions of this block include:

synchronization, pattern recognition, parallel or serial conversion, bit (de-)stufﬁng,

CRC checking and generation, Packet IDentiﬁer veriﬁcation and generation, address

recognition, and handshake evaluation and generation.

8.2.2 Routing logic

The routing logic directs signaling to the appropriate modules (mini-host controller,

Original USB repeater and Hi-Speed USB repeater) according to the topology in

which the hub is placed.

8.2.3 Transaction translator

The TT acts as a go-between mechanism that links devices operating in the Original

USB mode and the Hi-Speed USB upstream mode. For the ‘IN’ direction, data is

concatenated in TT buffers till the proper length is reached, before the host takes the

transaction. In the reverse direction (OUT), the mini-host dispenses the data

contained in TT buffers over a period that ﬁts into the Original USB bandwidth. This

continues until all outgoing data is emptied. TT buffers are used only on split

transactions.

8.2.4 Mini-host controller

The internal mini-host generates all the Original USB IN, OUT or SETUP tokens for

the downstream facing ports, while the upstream facing port is in the high-speed

mode. The responses from the Original USB devices are collected in TT buffers, until

the end of the complete split transaction clears the TT buffers.

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 10 of 51

8.2.5 Hub repeater

A hub repeater is responsible for managing connectivity on a per packet basis. It

implements packet signaling connectivity and resume connectivity. There are two

repeaters in the ISP1520: a Hi-Speed USB repeater and an Original USB repeater.

The only major difference between these two repeaters is the speed at which they

operate. When the hub is connected to an Original USB system, it automatically

switches itself to function as a pure Original USB hub.

8.2.6 Hub and port controllers

The hub controller provides status report. The port controller provides control for

individual downstream facing port; it controls the port routing module. Any port status

change will be reported to the host via the hub status change (interrupt) endpoint.

8.2.7 Bit clock recovery

The bit clock recovery circuit extracts the clock from the incoming USB data stream.

8.3 Phase-locked loop clock multiplier

A 12 MHz to 480 MHz clock multiplier PLL is integrated on-chip. This allows the use

of low-cost 12 MHz crystals. The low crystal frequency also minimizes

ElectroMagnetic Interference (EMI). No external components are required for the

operation of the PLL.

8.4 I2C-bus controller

A simple serial I2C-bus interface is provided to transfer vendor ID, product ID and

string descriptor from an external I2C-bus EEPROM (for example, Philips PCF8582 or

equivalent) or microcontroller. A master/slave I2C-bus protocol is implemented

according to the timing requirements as mentioned in the I2C-bus standard

speciﬁcations. The maximum data count during I2C-bus transfers for the ISP1520 is

256 bytes.

8.5 Overcurrent detection circuit

An overcurrent detection circuit is integrated on-chip. The main features of this circuit

are: self reporting, automatic resetting, low-trip time and low cost. This circuit offers

an easy solution at no extra hardware cost on the board.

8.6 GoodLink

Indication of a good USB connection is provided through GoodLink technology. An

LED can be directly connected to pin HUBGL_N via an external 330 Ω resistor.

During enumeration, the LED blinks on momentarily. After successful conﬁguration,

the LED blinks off for 100 ms upon each transaction.

This feature provides a user-friendly indication of the status of the hub, the connected

downstream devices and the USB trafﬁc. It is a useful diagnostics tool to isolate faulty

USB equipment and helps to reduce ﬁeld support and hotline costs.

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 11 of 51

8.7 Power-on reset

The ISP1520 has an internal Power-On Reset (POR) circuit.

The triggering voltage of the POR circuit is 2.03 V nominal. A POR is automatically

generated when VCC goes below the trigger voltage for a duration longer than 1 µs.

At t1: clock is running and available.

Fig 3. Power-on reset timing.

Stable external clock is to be available at A.

Fig 4. External clock with respect to power-on reset.

004aaa388

VCC

2.03 V

0 V

≤ 683 µs

POR

EXTERNAL CLOCK

004aaa365

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 12 of 51

9. Conﬁguration selections

The ISP1520 is conﬁgured through I/O pins and, optionally, through an external

I2C-bus, in which case the hub can update its conﬁguration descriptors as a master or

as a slave.

Table 3 shows the conﬁguration parameters.

[1] Multiple ganged power mode is reported as individual power mode; refer to the USB 2.0 speciﬁcation.

[2] When the hub uses the global overcurrent protection mode, the overcurrent indication is through the wHubStatus ﬁeld bit 1 (overcurrent)

and the corresponding change bit (overcurrent change).

9.1 Conﬁguration through I/O pins

9.1.1 Number of downstream facing ports

To discount a physical downstream facing port, connect pins DP and DM of that

downstream facing port to VCC (3.3 V) starting from the highest port number (4).

The sum of physical ports conﬁgured is reﬂected in the bNbrPorts ﬁeld.

Table 3: Conﬁguration parameters

Mode and selection Option Conﬁguration method

Pin control Software control

Control pin Reference Affected ﬁeld Reference

Numberofdownstream

facing ports 2 ports

3 ports

4 ports

DM1/DP1 to

DM4/DP4 see Section 9.1.1 bNbrPorts0 see Table 22

Power switching mode ganged

multiple ganged[1]

individual

PSW1_N to

PSW4_N see Section 9.1.2 wHubCharacteristics:

bits D1 and D0 see Table 22

bPwrOn2PwrGood:

time interval

Overcurrent protection

mode none

global[2]

multiple ganged

individual

NOOC and

OC1_N to

OC4_N

see Section 9.1.3 wHubCharacteristics:

bits D4 and D3 see Table 22

Non-removable ports any port can be

non-removable AMBn_N see Section 9.1.4 wHubCharacteristics:

bit D2 (compound hub) see Table 22

DeviceRemovable:

bit map

Port indicator support no

yes all GRNn_N see Section 9.1.5 wHubCharacteristics:

bit D7 see Table 22

Table 4: Downstream facing port number pin conﬁguration

Number of physical

downstream facing port DM1/DP1 DM2/DP2 DM3/DP3 DM4/DP4

415kΩ

pull-down 15 kΩ

pull-down

315kΩ

pull-down 15 kΩ

pull-down VCC

215kΩ

pull-down 15 kΩ

pull-down VCC VCC

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 13 of 51

9.1.2 Power switching

Power switching of downstream ports can be done individually or ganged, where all

ports are simultaneously switched with one power switch. The ISP1520 supports both

modes, which can be selected using input PSWn_N; see Table 5.

Voltage drop requirements: Self-powered hubs are required to provide a minimum

of 4.75 V to its output port connectors at all legal load conditions. To comply with

Underwriters Laboratory Inc. (UL) safety requirements, the power from any port must

be limited to 25 W (5 A at 5 V). Overcurrent protection may be implemented on a

global or individual basis.

Assuming a 5 V ±3 % power supply, the worst-case supply voltage is 4.85 V. This

only allows a voltage drop of 100 mV across the hub Printed-Circuit Board (PCB) to

each downstream connector. This includes a voltage drop across the:

•Power supply connector

•Hub PCB (power and ground traces, ferrite beads)

•Power switch (FET on-resistance)

•Overcurrent sense device.

The PCB resistance and power supply connector resistance may cause a drop of

25 mV, leaving only 75 mV as the voltage drop allowed across the power switch and

overcurrent sense device. The individual voltage drop components are shown in

Figure 5.

For global overcurrent detection, an increased voltage drop is needed for the

overcurrent sense device (in this case, a low-ohmic resistor). This can be realized by

using a special power supply of 5.1 V ±3 %, as shown in Figure 6.

(1) Includes PCB traces, ferrite beads, and so on.

Fig 5. Typical voltage drop components in the self-powered mode using individual overcurrent detection.

5 V

POWER SUPPLY

± 3 % regulated −

+4.85 V (min)

004aaa261

low-ohmic

PMOS switch

ISP1520

power switch

(PSWn_N)

VBUS

D+

D−

GND

SHIELD

4.75 V (min)

downstream

port

connector

hub board

resistance

voltage drop

25 mV

voltage drop

75 mV

(1)

(1) Includes PCB traces, ferrite beads, and so on.

Fig 6. Typical voltage drop components in the self-powered mode using global overcurrent detection.

5.1 V KICK-UP

POWER SUPPLY

± 3 % regulated −

+4.95 V (min)

004aaa262

low-ohmic

PMOS switch

ISP1520

power switch

(PSWn_N)

VBUS

D+

D−

GND

SHIELD

4.75 V (min)

downstream

port

connector

hub board

resistance

voltage drop

25 mV

voltage drop

75 mV

low-ohmic

sense resistor

for overcurrent

detection

voltage drop

100 mV

(1)

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 14 of 51

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 overcurrent protection modes are selected using pins PSWn_N,

following the power switching modes selection scheme; see Table 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 Table 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 Table 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

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

Table 7: Overcurrent detection mode selection pin conﬁguration

Pin ADOC Mode selection Description

3.3 V analog threshold ∆Vtrip

Ground digital normal digital TTL level

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 15 of 51

The detection of any non-removable port sets the hub descriptor into a compound

hub.

9.1.5 Port indicator support

The port indicator support can be disabled by grounding all green port indicators (all

pins GRNn_N); see Table 9. This is a global feature. It is not possible to disable port

indicators for only one port.

9.2 Device descriptors and string descriptors settings using I2C-bus

9.2.1 Background information on I2C-bus

The I2C-bus is suitable for bi-directional communication between ICs or modules. It

consists of two bi-directional lines: SDA for data signals and SCL for clock signals.

Both these lines must be connected to a positive supply voltage through a pull-up

resistor.

The basic I2C-bus protocol is deﬁned as:

•Data transfer is initiated only when the bus is not busy.

•Changes in the data line occur when the clock is LOW and must be stable when

the clock is HIGH. Any changes in data lines when the clock is HIGH will be

interpreted as control signals.

Different conditions on I2C-bus: The I2C-bus protocol deﬁnes the following

conditions:

Not busy — both SDA and SCL remain HIGH

START — a HIGH-to-LOW transition on SDA, while SCL is HIGH

STOP — a LOW-to-HIGH transition on SDA, while SCL is HIGH

Data valid — after a START condition, data on SDA must be stable for the duration of

the HIGH period of SCL.

Data transfer: The master initiates each data transfer using a START condition and

terminates it by generating a STOP condition. To facilitate the next byte transfer, each

byte of data must be acknowledged by the receiver. The acknowledgement is done by

pulling the SDA line LOW on the ninth bit of the data. An extra clock pulse needs to

be generated by the master to accommodate this bit.

For more detailed information on the operation of the bus, refer to

The I

C-bus

speciﬁcation

Table 8: Non-removable port pin conﬁguration

AMBn_N (n=1to4) Non-removable port

Ground non-removable

Pull-up with amber LED removable

Table 9: Port indicator support: pin conﬁguration

GRN1_N to GRN4_N Port indicator support

Ground not supported

LED pull-up green LED for at least one port supported

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 16 of 51

I2C-bus address: The address of the ISP1520 is given in Table 10.

9.2.2 Architecture of conﬁgurable hub descriptors

The conﬁgurable hub descriptors can be masked in the internal ROM memory; see

Figure 7. These descriptors can also be supplied from an external EEPROM or a

microcontroller. The ISP1520 implements both the master and slave I2C-bus

controllers. The information from the external EEPROM or the microcontroller is

transferred into the internal RAM during the power-on reset. A signature word is used

to identify correct descriptors. If the signature matches, the content of the RAM is

chosen instead of the ROM.

When the external microcontroller mode is selected and while the external

microcontroller is writing to the internal RAM, any request to conﬁgurable descriptors

will be responded to with a Not AcKnowledge (NAK). There is no speciﬁed time-out

period for the NAK signal. This data is then passed to the host during the

enumeration process.

The three conﬁguration methods are selected by connecting pins SCL and SDA in the

manner given in Table 11.

Table 10: I2C-bus slave address

MSB Slave address LSB

Bit A7 A6 A5 A4 A3 A2 A1 R/W

Value 00110100/1

The I2C-bus cannot be shared between the EEPROM and the external microcontroller.

Fig 7. Conﬁgurable hub descriptors.

MLD711

MICROCONTROLLER SERIAL EEPROM

MASTER/SLAVE

I2C-BUS INTERFACE

signature

match

RAM

(256 bytes)

DESCRIPTOR

GENERATOR

INTERFACE ROM

(256 bytes)

MUX

HUB CORE

I2C-bus

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 17 of 51

9.2.3 ROM or EEPROM map

Remark: A 128-byte EEPROM supports one language ID only, and a 256-byte

EEPROM supports two language IDs.

9.2.4 ROM or EEPROM detailed map

Table 11: Conﬁguration method

Conﬁguration method SCL SDA

Internal ROM ground ground

External EEPROM 2.2 to 4.7 kΩ pull-up 2.2 to 4.7 kΩ pull-up

External microcontroller driven LOW by the

microcontroller during reset 2.2 to 4.7 kΩ pull-up

Fig 8. ROM or EEPROM map.

MLD714

Signature

00H

02H

10H

7FH

FFH

80H

0AH

Device Descriptor

String Descriptor

(first Language ID):

iManufacturer string

iProduct string

iSerial Number string

String Descriptor

(second Language ID):

iManufacturer string

iProduct string

iSerial Number string

Language ID

Table 12: ROM or EEPROM detailed map

Address

(Hex) Content Default

(Hex) Example

(Hex) Comment

Signature descriptor

00 signature (low 55 - signature to signify valid data comment

01 signature (high) AA -

Device descriptor

02 idVendor (low) CC - Philips Semiconductors vendor ID

03 idVendor (high) 04 -

04 idProduct (low) 20 - ISP1520 product ID

05 idProduct (high) 15 -

06 bcdDevice (low) 00 - device release; silicon revision

increments this value

07 bcdDevice (high) 02 -

08 RSV, iSN, iP, iM - 00 if all the three strings are supported, the

value of this byte is 39H

09 reserved - FF -

String descriptor Index 0 (language ID)

0A bLength[1] - 06 two language ID support

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 18 of 51

0B bDescriptorType - 03[2] STRING

0C wLANGID[0] - 09 LANGID code zero (ﬁrst language ID)

(English—USA in this example)

0D - 04

0E wLANGID[1] - 09 LANGID code one (second language ID)

(English—UK in this example)

0F - 08

String descriptor Index 1 (iManufacturer)[3]

10 bLength - 2E string descriptor length (manufacturer ID)

11 bDescriptorType - 03[2] STRING

12 13 bString - 50 00 P of Philips

14 15 - 68 00 h

16 17 - 69 00 i

18 19 - 6C 00 l

1A 1B - 69 00 i

1C 1D - 70 00 p

1E 1F - 73 00 s

20 21 - 20 00

22 23 - 53 00 S of Semiconductors

24 25 - 65 00 e

26 27 - 6D 00 m

28 29 - 69 00 i

2A 2B - 63 00 c

2C 2D - 6F 00 o

2E 2F - 6E 00 n

30 31 - 64 00 d

32 33 - 75 00 u

34 35 - 63 00 c

36 37 - 74 00 t

38 39 - 6F 00 o

3A 3B - 72 00 r

3C 3D - 73 00 s

String descriptor Index 2 (iProduct)

3E bLength - 10 string descriptor length (product ID)

3F bDescriptorType - 03[2] STRING

40 41 bString - 49 00 I of ISP1520

42 43 - 53 00 S

44 45 - 50 00 P

46 47 - 31 00 1

48 49 - 35 00 5

4A 4B - 32 00 2

4C 4D - 30 00 0

Table 12: ROM or EEPROM detailed map

…continued

Address

(Hex) Content Default

(Hex) Example

(Hex) Comment

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 19 of 51

String descriptor Index 3 (iSerialNumber)

Remark: If supported, this string must be unique.

4E bLength - 3A string descriptor length (serial number)

4F bDescriptorType - 03[2] STRING

50 51 bString - 39 00 9 of 947337877678 = wired support

52 53 - 34 00 4

54 55 - 37 00 7

56 57 - 33 00 3

58 59 - 33 00 3

5A 5B - 37 00 7

5C 5D - 38 00 8

5E 5F - 37 00 7

60 61 - 37 00 7

62 63 - 36 00 6

64 65 - 37 00 7

66 67 - 38 00 8

68 69 - 20 00

6A 6B - 3D 00 =

6C 6D - 20 00

6E 6F - 77 00 w

70 71 - 69 00 i

72 73 - 72 00 r

74 75 - 65 00 e

76 77 - 64 00 d

78 79 - 20 00

7A 7B - 73 00 s

7C 7D - 75 00 u

7E 7F - 70 00 p

80 81 - 70 00 p

82 83 - 6F 00 o

84 85 - 72 00 r

86 87 - 74 00 t

Table 12: ROM or EEPROM detailed map

…continued

Address

(Hex) Content Default

(Hex) Example

(Hex) Comment

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 20 of 51

String descriptor Index 1 (iManufacturer) second language

88 bLength - 2E string descriptor length (manufacturer ID)

89 bDescriptorType - 03[2] STRING

8A 8B bString - 50 00 P of Philips

8C 8D - 68 00 h

8E 8F - 69 00 i

90 91 - 6C 00 l

92 93 - 69 00 i

94 95 - 70 00 p

96 97 - 73 00 s

98 99 - 20 00

9A 9B - 53 00 S of Semiconductors

9C 9D - 65 00 e

9E 9F - 6D 00 m

A0 A1 - 69 00 i

A2 A3 - 63 00 c

A4 A5 - 6F 00 o

A6 A7 - 6E 00 n

A8 A9 - 64 00 d

AA AB - 75 00 u

AC AD - 63 00 c

AE AF - 74 00 t

B0 B1 - 6F 00 o

B2 B3 - 72 00 r

B4 B5 - 73 00 s

String descriptor Index 2 (iProduct)

B6 bLength - 10[1] string descriptors (product ID)

B7 bDescriptorType - 03[2] STRING

B8 B9 bString - 49 00 I of ISP1520

BA BB - 53 00 S

BC BD - 50 00 P

BE BF - 31 00 1

C0 C1 - 35 00 5

C2 C3 - 32 00 2

C4 C5 - 30 00 0

String descriptor Index 3 (iSerialNumber)

C6 bLength - 16[1] string descriptors (serial number)

C7 bDescriptorType - 03[2] STRING

C8 C9 bString - 36 00 6 of 6568824022

CA CB - 35 00 5

Table 12: ROM or EEPROM detailed map

…continued

Address

(Hex) Content Default

(Hex) Example

(Hex) Comment

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 21 of 51

[1] If this string descriptor is not supported, this bLength ﬁeld must be programmed with the value 02H.

[2] If this string descriptor is not supported, this bDescriptorType ﬁeld must be used (programmed with

any value, for example, 03H).

[3] String descriptor index (iManufacturer) starts from the address 0EH for one language ID support and

10H for two languages ID support.

CC CD - 36 00 6

CE CF - 38 00 8

D0 D1 - 38 00 8

D2 D3 - 32 00 2

D4 D5 - 34 00 4

D6 D7 - 30 00 0

D8 D9 - 32 00 2

DA DB - 32 00 2

DC DD - FF FF

DE DF - FF FF

E0 E1 - FF FF

E2 E3 - FF FF

E4 E5 - FF FF

E6 E7 - FF FF

E8 E9 - FF FF

EA EB - FF FF

EC ED - FF FF

EE EF - FF FF

F0 F1 - FF FF

F2 F3 - FF FF

F4 F5 - FF FF

F6 F7 - FF FF

F8 F9 - FF FF

FA FB - FF FF

FC FD - FF FF

FE - FF

FF - FF upper boundary of all string descriptors

Table 12: ROM or EEPROM detailed map

…continued

Address

(Hex) Content Default

(Hex) Example

(Hex) Comment

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 22 of 51

10. Hub controller description

Each USB device is composed of several independent logic endpoints. An endpoint

acts as a terminus of communication ﬂow between the host and the device. At design

time, each endpoint is assigned a unique number (endpoint identiﬁer; see Table 13).

The combination of the device address (given by the host during enumeration), the

endpoint number and the transfer direction allows each endpoint to be uniquely

referenced.

The ISP1520 has two endpoints: endpoint 0 (control) and endpoint 1 (interrupt).

[1] IN: input for the USB host; OUT: output from the USB host.

10.1 Endpoint 0

According to the USB speciﬁcation, all devices must implement a default control

endpoint. This endpoint is used by the host to conﬁgure the USB device. It provides

access to the device conﬁguration and allows generic USB status and control access.

The ISP1520 supports the following descriptor information through its control

endpoint 0:

•Device descriptor

•Device_qualiﬁer descriptor

•Conﬁguration descriptor

•Interface descriptor

•Endpoint descriptor

•Hub descriptor

•Other_speed_conﬁguration descriptor.

The maximum packet size of this endpoint is 64 bytes.

10.2 Endpoint 1

Endpoint 1 can be accessed only after the hub has been conﬁgured by the host (by

sending the Set Conﬁguration command). It is used by the ISP1520 to send the

status change information to the host.

Endpoint 1 is an interrupt endpoint. The host polls this endpoint once every 255 ms.

After the hub is conﬁgured, an IN token is sent by the host to request the port change

status. If the hub detects no change in the port status, it returns a NAK to this

request, otherwise the Status Change byte is sent. Table 14 shows the content of the

change byte.

Table 13: Hub endpoints

Function Endpoint

identiﬁer Transfer type Direction [1] Maximum packet

size (bytes)

Hub ports 0 to 4 0 control OUT 64

IN 64

1 interrupt IN 1

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 23 of 51

11. Descriptors

The ISP1520 hub controller supports the following standard USB descriptors:

•Device

•Device_qualiﬁer

•Other_speed_conﬁguration

•Conﬁguration

•Interface

•Endpoint

•Hub.

The hub returns different descriptors based on the mode of operation: full-speed or

high-speed.

Table 14: Status Change byte: bit allocation

Bit Name Value Description

0 Hub Status Change 0 no change in the hub status

1 change in the hub status detected

1 to 4 Port n Status Change 0 no change in the status of port n (n=1to4)

1 change in the status of port n (n = 1 to 4)

5 to 7 - - not used

Table 15: Device descriptor

Offset

(bytes) Field name Value (Hex) Comments

Full-speed High-speed

0 bLength 12 12 descriptor length = 18 bytes

1 bDescriptorType 01 01 type = DEVICE

2 bcdUSB 00 00 see USB speciﬁcation Rev. 2.0

30202

4 bDeviceClass 09 09 HUB_CLASSCODE

5 bDeviceSubClass 00 00 HubSubClassCode

6 bDeviceProtocol 00 01 HubProtocolHSpeedOneTT

7 bMaxPacketSize0 40 40 packet size = 64 bytes

8 idVendor CC CC Philips Semiconductors vendor ID (04CC); can be

customized

90404

10 idProduct 20 20 the ISP1520 product ID; can be customized

11 15 15

12 bcdDevice 00 00 device ID; can be customized

13 02 02

14 iManufacturer 01 01 can be customized

15 iProduct 02 02 can be customized

16 iSerialNumber 03 03 can be customized; this value must be unique

17 bNumConﬁgurations 01 01 one conﬁguration

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 24 of 51

[1] Value in units of 2 mA.

Table 16: Device_qualiﬁer descriptor

Offset

(bytes) Field name Value (Hex) Comments

Full-speed High-speed

0 bLength 0A 0A descriptor length = 10 bytes

1 bDescriptorType 06 06 type = DeviceQualiﬁerType

2 bcdUSB 00 00 see USB speciﬁcation Rev. 2.0

30202

4 bDeviceClass 09 09 HUB_CLASSCODE

5 bDeviceSubClass 00 00 HubSubClassCode

6 bDeviceProtocol 00 01 HubProtocolHSpeedOneTT

7 bMaxPacketSize0 40 40 packet size = 64 bytes

8 bNumConﬁgurations 01 01 number of conﬁgurations

Table 17: Other_speed_conﬁguration descriptor

Offset

(bytes) Field name Value (Hex) Comments

Full-speed High-speed

0 bLength 09 09 descriptor length=9bytes

1 bDescriptorType 07 07 type = OtherSpeedConﬁgurationType

2 wTotalLength 19 19 TotalConfByte

30000

4 bNumInterfaces 01 01 -

5 bConﬁgurationValue 01 01 -

6 iConﬁguration 00 00 no string supported

7 bmAttributes E0 E0 self-powered

A0 A0 others

8 bMaxPower 00 00 self-powered

Table 18: Conﬁguration descriptor

Offset

(bytes) Field name Value (Hex) Comments

Full-speed High-speed

0 bLength 09 09 descriptor length=9bytes

1 bDescriptorType 02 02 type = CONFIGURATION

2 wTotalLength 19 19 total length of conﬁguration, interface and endpoint

descriptors = 25 bytes

30000

4 bNumInterfaces 01 01 one interface

5 bConﬁgurationValue 01 01 conﬁguration value = 1

6 iConﬁguration 00 00 no conﬁguration string descriptor

7 bmAttributes E0 E0 self-powered

8 bMaxPower[1] 00 00 self-powered

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 25 of 51

[1] Value in units of 2 ms.

Table 19: Interface descriptor

Offset

(bytes) Field name Value (Hex) Comments

Full-speed High-speed

0 bLength 09 09 descriptor length=9bytes

1 bDescriptorType 04 04 type = INTERFACE

2 bInterfaceNumber 00 00 -

3 bAlternateSetting 00 00 no alternate setting

4 bNumEndpoints 01 01 status change (interrupt) endpoint

5 bInterfaceClass 09 09 HUB_CLASSCODE

6 bInterfaceSubClass 00 00 HubSubClassCode

7 bInterfaceProtocol 00 00 -

8 bInterface 00 00 no interface string descriptor

Table 20: Endpoint descriptor

Offset

(bytes) Field name Value (Hex) Comments

Full-speed High-speed

0 bLength 07 07 descriptor length=7bytes

1 bDescriptorType 05 05 type = ENDPOINT

2 bEndpointAddress 81 81 endpoint 1 at the address number 1

3 bmAttributes 03 03 interrupt endpoint

4 wMaxPacketSize 01 01 packet size = 1 byte

50000

6 bInterval FF 0C polling interval

Table 21: Hub descriptor

Offset

(bytes) Field name Value (Hex) Comments

Full-speed High-speed

0 bDescLength 09 09 descriptor length=9bytes

1 bDescriptorType 29 29 type = HUB

2 bNbrPorts 04 04 number of enabled downstream facing ports; selectable by

DP/DM strapping

03 03

02 02

3 wHubCharacteristics A9 A9 see Table 22

40000

5 bPwrOn2PwrGood[1] 32 32 ganged or individual mode = 100 ms

6 bHubContrCurrent 64 64 -

7 DeviceRemovable 00 00 four downstream facing ports, no embedded port

8 PortPwrCtrlMask FF FF -

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 26 of 51

12. Hub requests

The hub must react to a variety of requests initiated by the host. Some requests are

standard and are implemented by any USB device whereas others are hub-class

speciﬁc requests.

12.1 Standard USB requests

Table 23 shows the supported standard USB requests.

Table 22: wHubCharacteristics bit description

Bit Function Value Description

D0, D1 logical power switching mode 00 ganged

01 individual and multiple ganged

11 -

D2 compound hub selection 0 non-compound

1 compound

D3, D4 overcurrent protection mode 00 global

01 individual and multiple ganged

10 none

11 -

D5 - - -

D6 - - -

D7 port indicator 0 global feature

Table 23: Standard USB requests

Request bmRequestType

byte 0

(bits 7 to 0)

bRequest

byte 1

(hex)

wValue

bytes 2, 3

(hex)

wIndex

bytes 4, 5

(hex)

wLength

bytes 6, 7

(hex) Data response

Address

Set Address 0000 0000 05 device

address[1] 00, 00 00, 00 none

Conﬁguration

Get Conﬁguration 1000 0000 08 00, 00 00, 00 01, 00 conﬁguration value

Set Conﬁguration (0) 0000 0000 09 00, 00 00, 00 00, 00 none

Set Conﬁguration (1) 0000 0000 09 01, 00 00, 00 00, 00 none

Descriptors

Get Conﬁguration

Descriptor 1000 0000 06 00, 02 00, 00 length[2] conﬁguration interface

and endpoint descriptors

Get Device Descriptor 1000 0000 06 00, 01 00, 00 length[2] device descriptor

Get String Descriptor (0) 1000 0000 06 03, 00 00, 00 length[2] language ID descriptor

Get String Descriptor (1) 1000 0000 06 03, 01 00, 00 length[2] manufacturer string

Get String Descriptor (2) 1000 0000 06 03, 02 00, 00 length[2] product string

Get String Descriptor (3) 1000 0000 06 03, 03 00, 00 length[2] serial number string

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 27 of 51

[1] Device address: 0 to 127.

[2] Returned value in bytes.

[3] MSB speciﬁes endpoint direction: 0 = OUT, 1 = IN. The ISP1520 accepts either value.

12.2 Hub class requests

Table 24 shows the hub class requests.

Feature

Clear Device Feature

(Remote_ Wakeup) 0000 0000 01 01, 00 00, 00 00, 00 none

Clear Endpoint (1)

Feature (Halt/Stall) 0000 0010 01 00, 00 81, 00 00, 00 none

Set Device Feature

(Remote_ Wakeup) 0000 0000 03 01, 00 00, 00 00, 00 none

Set Endpoint (1)

Feature (Halt/Stall) 0000 0010 03 00, 00 81, 00 00, 00 none

Status

Get Device Status 1000 0000 00 00, 00 00, 00 02, 00 device status

Get Interface Status 1000 0001 00 00, 00 00, 00 02, 00 zero

Get Endpoint (0) Status 1000 0010 00 00, 00 00/80, 00[3] 02, 00 endpoint 0 status

Get Endpoint (1) Status 1000 0010 00 00, 00 81, 00 02, 00 endpoint 1 status

Table 23: Standard USB requests

…continued

Request bmRequestType

byte 0

(bits 7 to 0)

bRequest

byte 1

(hex)

wValue

bytes 2, 3

(hex)

wIndex

bytes 4, 5

(hex)

wLength

bytes 6, 7

(hex) Data response

Table 24: Hub class requests

Request bmRequestType

byte 0

(bits 7 to 0)

bRequest

byte 1

(hex)

wValue

bytes 2, 3

(hex)

wIndex

bytes 4, 5

(hex)

wLength

bytes 6, 7

(hex) Data

Descriptor

Get Hub Descriptor 1010 0000 06 descriptortype

and index 00, 00 length[2] descriptor

Feature

Clear Hub Feature

(C_LOCAL_POWER) 0010 0000 01 00, 00 00, 00 00, 00 none

Clear Port Feature 0010 0011 01 feature[3], 00 port[4], 00 00, 00 none

Set Port Feature 0010 0011 03 feature[3], 00 port[4], 00 00, 00 none

Status

Get Hub Status 1010 0000 00 00, 00 00, 00 04, 00 hub status and

change status

Get Port Status 1010 0011 00 00, 00 port[4], 00 04, 00 port status and

change status

ClearTTBuffer 0010 0011 08 Dev_Addr,

EP_nr 01, 00 00, 00 none

ResetTT 0010 0000 09 00, 00 01, 00 00, 00 none

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 28 of 51

[1] Returns vendor-speciﬁc data.

[2] Returned value in bytes.

[3] Feature selector value; see Table 25.

[4] Downstream port identiﬁer: 1 to N with N is number of enabled ports (2 to 4).

12.3 Detailed responses to hub requests

12.3.1 Get conﬁguration

This request returns the conﬁguration value of the device. This request returns one

byte of data; see Table 26.

GetTTState 1010 0011 10 TT-ﬂags 01, 00 -[1] TT state

StopTT 0010 0011 11 00, 00 01, 00 00, 00 none

Test modes

Test_J 0010 0011 03 15, 00 port[4], 01 00, 00 none

Test_K 0010 0011 03 15, 00 port[4], 02 00, 00 none

Test_SE0_NAK 0010 0011 03 15, 00 port[4], 03 00, 00 none

Test_Packet 0010 0011 03 15, 00 port[4], 04 00, 00 none

Test_Force_Enable 0010 0011 03 15, 00 port[4], 05 00, 00 none

Table 24: Hub class requests

…continued

Request bmRequestType

byte 0

(bits 7 to 0)

bRequest

byte 1

(hex)

wValue

bytes 2, 3

(hex)

wIndex

bytes 4, 5

(hex)

wLength

bytes 6, 7

(hex) Data

Table 25: Hub class feature selector

Feature selector name Recipient Value

C_HUB_LOCAL_POWER hub 00

C_HUB_OVER_CURRENT hub 01

PORT_CONNECTION port 00

PORT_ENABLE port 01

PORT_SUSPEND port 02

PORT_OVER_CURRENT port 03

PORT_RESET port 04

PORT_POWER port 08

PORT_LOW_SPEED port 09

C_PORT_CONNECTION port 16

C_PORT_ENABLE port 17

C_PORT_SUSPEND port 18

C_PORT_OVER_CURRENT port 19

C_PORT_RESET port 20

PORT_TEST port 21

PORT_INDICATOR port 22

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 29 of 51

12.3.2 Get device status

This request returns two bytes of data; see Table 27.

12.3.3 Get interface status

The request returns two bytes of data; see Table 28.

12.3.4 Get endpoint status

The request returns two bytes of data; see Table 29.

12.3.5 Get hub status

The request returns four bytes of data; see Table 30.

Table 26: Get hub conﬁguration response

Bit Function Value Description

0 conﬁguration value 0 device is not conﬁgured

1 device is conﬁgured

1 to 7 reserved 0 -

Table 27: Get device status response

Bit Function Value Description

0 self-powered 1 self-powered

1 remote wake-up 0 disabled

1 enabled

2 to 15 reserved 0 -

Table 28: Get interface status response

Bit Function Value Description

0 to 15 reserved 0 -

Table 29: Get endpoint status response

Bit Function Value Description

0 halt 0 endpoint is not halted

1 endpoint is halted

1 to 15 reserved 0 -

Table 30: Get hub status response

Bit Function Value Description

0 local power source 0 local power supply good

1 local power supply lost (inactive)

1 overcurrent indicator 0 no overcurrent condition currently exists

1 a hub overcurrent condition exists

2 to 15 reserved 0 -

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 30 of 51

12.3.6 Get port status

This request returns four bytes of data. The ﬁrst word contains the port status bits

(wPortStatus), and the next word contains the port status change bits

(wPortChange). The contents of wPortStatus is given in Table 31, and the contents of

wPortChange is given in Table 32.

16 local power status change 0 no change in the local power status

1 local power status has changed

17 overcurrent indicator change 0 no change in overcurrent

1 overcurrent status has changed

18 to 31 reserved 0 -

Table 30: Get hub status response

…continued

Bit Function Value Description

Table 31: Get port status response (wPortStatus)

Bit Function Value Description

0 current connect status 0 no device is present

1 a device is present on this port

1 port enabled or disabled 0 port is disabled

1 port is enabled

2 suspend 0 port is not suspended

1 port is suspended

3 overcurrent indicator 0 no overcurrent condition exists

1 an overcurrent condition exists

4 reset 0 reset signaling is not asserted

1 reset signaling is asserted

5 to 7 reserved 0 -

8 port power 0 port is in the powered-off state

1 port is not in the powered-off state

9 low-speed device attached 0 full-speed or high-speed device is

attached

1 low-speed device is attached

10 high-speed device attached 0 full-speed device is attached

1 high-speed device is attached

11 port test mode 0 not in the port test mode

1 in the port test mode

12 port indicator control 0 displays default colors

1 displays software controlled color

13 to 15 reserved 0 -

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 31 of 51

12.4 Various get descriptors

bmRequestType — 10000000B

bmRequest — GET_DESCRIPTOR = 6

Table 32: Get port status change response (wPortChange)

Bit Function Value Description

0 connect status change 0 no change in the current connect status

1 change in the current connect status

1 port enable or disable change 0 port is enabled

1 port is disabled

2 suspend change 0 no change

1 resume complete

3 overcurrent indicator change 0 no change in the overcurrent indicator

1 change in the overcurrent indicator

4 reset change 0 no change

1 reset complete

5 to 15 reserved 0 -

Table 33: Get descriptor request

Request name wValue wIndex Data

Descriptor index Descriptor type Zero/Language ID

Get device

descriptor 00 01 0 device descriptor

Get conﬁguration

descriptor 00 02 0 conﬁguration interface and

endpoint descriptors

Get language ID

string descriptor 00 03 0 language ID support string

Get manufacturer

string descriptor 01 03 n manufacturer string in LANGID n

Get product string

descriptor 02 03 n product string in LANGID n

Get serial number

string descriptor 03 03 n serial number string in LANGID n

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 32 of 51

13. Limiting values

[1] Valid only when supply voltage is present.

[2] Test method available on request.

[3] Equivalent to discharging a 100 pF capacitor via a 1.5 kΩ resistor (Human Body Model).

14. Recommended operating conditions

[1] All internal pull-up resistors are connected to this voltage.

Table 34: Absolute maximum ratings

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol Parameter Conditions Min Max Unit

VCC supply voltage 3.3 V −0.5 +4.6 V

VREF(5V0) input reference voltage 5.0 V −0.5 +5.25 V

VI(5V0) input voltage on 5 V buffers 3.0 V < VCC < 3.6 V [1] −0.5 +6.0 V

VI(3V3) input voltage on 3.3 V buffers 3.0 V < VCC < 3.6 V −0.5 +4.6 V

VO(3V3) output voltage on 3.3 V buffers −0.5 +4.6 V

Ilu latch-up current VI< 0 or VI>V

CC - 100 mA

Vesd electrostatic discharge voltage on pins DM1 to DM4, DP1 to DP4,

OC1_N to OC4_N, and all

VREF(5V0) and GND pins; ILI <1µA

[2][3] −4000 +4000 V

on all other pins; ILI <1µA[2][3] −2000 +2000 V

Tstg storage temperature −40 +125 °C

Table 35: Recommended operating ranges

Symbol Parameter Min Typ Max Unit

VCC supply voltage 3.3 V 3.0 3.3 3.6 V

VREF(5V0) input reference voltage 5 V [1] 4.5 5.0 5.25 V

VI(3V3) input voltage on 3.3 V pins 0 - VCC V

VI(5V0) input voltage on 5 V tolerant pins 0 - VREF(5V0) V

Tamb operating temperature 0 - 70 °C

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 33 of 51

15. Static characteristics

[1] Irrespective of the number of devices connected, the value of ICC is always 91 mA in full-speed.

[2] Including Rpu drop current.

[1] All pins are 5 V tolerant.

Table 36: Static characteristics: supply pins

= 3.0 V to 3.6 V; T

amb

Cto70

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Full-speed

IREF(5V0) supply current 5 V - 0.5 - mA

ICC(tot) total supply current 3.3 V ICC(tot) =I

CC1 +I

CC2 +I

CC3 +I

CC4 [1] -91-mA

High-speed

ICC(tot) total supply current 3.3 V suspend mode; internal clock stopped [2] - 0.5 - mA

no device connected - 136.3 - mA

1 active device connected - 180 - mA

2 active devices connected - 221 - mA

3 active devices connected - 256 - mA

4 active devices connected - 288 - mA

Table 37: Static characteristics: digital input and outputs[1]

= 3.0 V to 3.6 V; T

amb

Cto70

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Digital input pins

VIL LOW-level input voltage - - 0.8 V

VIH HIGH-level input voltage 2.0 - - V

ILI input leakage current −1- +1µA

Schmitt-trigger input pins

Vth(LH) positive-going threshold voltage 1.4 - 1.9 V

Vth(HL) negative-going threshold voltage 0.9 - 1.5 V

Vhys hysteresis voltage 0.4 - 0.7 V

Overcurrent detection pins OC1_N to OC4_N

∆Vtrip overcurrent detection trip voltage ∆V=V

CC −VOCn_N -84-mV

Digital output pins

VOL LOW-level output voltage - - 0.4 V

VOH HIGH-level output voltage 2.4 - - V

Open-drain output pins

IOZ OFF-state output current −1- +1µA

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 34 of 51

[1] All pins are 5 V tolerant.

[2] The bus capacitance (Cb) is speciﬁed in pF. To meet the speciﬁcation for VOL and the maximum rise time (300 ns), use an external

pull-up resistor with Rmax = 850/CbkΩ and Rmin =(V

CC −0.4)/3 kΩ.

Table 38: Static characteristics: I2C-bus interface block

= 3.0 V to 3.6 V; T

amb

Cto70

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Input pin SCL and input/output pin SDA[1]

VIL LOW-level input voltage - - 0.9 V

VIH HIGH-level input voltage 2.1 - - V

Vhys hysteresis voltage 0.15 - - V

VOL LOW-level output voltage - - 0.4 V

tfoutput fall time VIH to VIL 10<C

b=10pFto400pF [2] - 0 250 ns

Table 39: Static characteristics: USB interface block (DP0 to DP4 and DM0 to DM4)

= 3.0 V to 3.6 V; T

amb

Cto70

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Input levels for high-speed

VHSSQ squelch detection threshold

(differential signal amplitude) squelch detected - - 100 mV

no squelch detected 150 - - mV

VHSCM data signaling common-mode

voltage range −50 - +500 mV

Output levels for high-speed

VHSOI idle state −10 - +10 mV

VHSOH data signaling HIGH 360 - 440 mV

VHSOL data signaling LOW −10 - +10 mV

VCHIRPJ chirp J level (differential voltage) [1] 700 - 1100 mV

VCHIRPK chirp K level (differential voltage) [1] −900 - −500 mV

Input levels for full-speed and low-speed

VIL LOW-level input voltage - - 0.8 V

VIH HIGH-level input voltage (drive) 2.0 - - V

VIHZ HIGH-level input voltage (ﬂoating) 2.7 - 3.6 V

VDI differential input sensitivity |DP −DM|0.2 - - V

VCM differential common-mode range 0.8 - 2.5 V

Output levels for full-speed and low-speed

VOL LOW-level output voltage 0 - 0.3 V

VOH HIGH-level output voltage 2.8 - 3.6 V

VCRS output signal crossover point

voltage [2] 1.3 - 2.0 V

Leakage current

ILZ OFF-state leakage current −1- +1µA

Capacitance

CIN transceiver capacitance pin to GND - - 20 pF

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 35 of 51

[1] For minimum value, the HS termination resistor is disabled and the pull-up resistor is connected. Only during reset, when both the hub

and the device are capable of high-speed operation.

[2] Characterized only, not tested. Limits guaranteed by design.

[3] In the suspend mode, the minimum voltage is 2.7 V.

Resistance

ZINP input impedance 10 - - MΩ

Termination

VTERM termination voltage for pull-up

resistor on pin RPU [3] 3.0 - 3.6 V

Table 39: Static characteristics: USB interface block (DP0 to DP4 and DM0 to DM4)

…continued

= 3.0 V to 3.6 V; T

amb

Cto70

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 36 of 51

16. Dynamic characteristics

[1] Recommended accuracy of the clock frequency is 500 ppm for the crystal.

[2] Suggested values for external capacitors when using a crystal are 22 to 27 pF.

[1] All pins are 5 V tolerant.

Table 40: Dynamic characteristics: system clock timing

Symbol Parameter Conditions Min Typ Max Unit

Reset

tW(POR) internal power-on reset pulse

width 0.2 - 1 µs

tW(RESET_N) pulse width on pin RESET_N 0.2 - - µs

Crystal oscillator

fclk clock frequency crystal [1][2] - 12 - MHz

External clock input

δclock duty cycle - 50 - %

Table 41: Dynamic characteristics: overcurrent sense timing

= 3.0 V to 3.6 V; T

amb

Cto70

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Overcurrent sense pins OC1_N to OC4_N

ttrip overcurrent trip response time from

OCn_N LOW to PSWn_N HIGH see Figure 9 --15ms

Overcurrent input: pins OCn_N; power switch output: pins PSWn_N.

Fig 9. Overcurrent trip response timing.

mbl032

0 V

overcurrent

input

0 V

power switch

output

trip

∆V

trip

Table 42: Dynamic characteristics: digital pins[1]

= 3.0 V to 3.6 V; T

amb

Cto70

C; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

tt(HL),

tt(LH)

output transition time 4 - 15 ns

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 37 of 51

Table 43: Dynamic characteristics: high-speed source electrical characteristics

= 3.0 V to 3.6 V; T

amb

Cto70

C; test circuit Figure 21; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Driver characteristics

tHSR rise time 10 % to 90 % 500 - - ps

tHSF fall time 90 % to 10 % 500 - - ps

Clock timing

tHSDRAT data rate 479.76 - 480.24 Mbit/s

tHSFRAM microframe interval 124.9375 - 125.0625 µs

tHSRFI consecutive microframe interval

difference 1 - four high-speed

bit times ns

Table 44: Dynamic characteristics: full-speed source electrical characteristics

= 3.0 V to 3.6 V; T

amb

Cto70

C; test circuit Figure 22; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Driver characteristics

tFR rise time CL= 50 pF; 10 % to 90 % of

|VOH −VOL|4 - 20 ns

tFF fall time CL= 50 pF; 90 % to 10 % of

|VOH −VOL|4 - 20 ns

tFRFM differential rise and fall time

matching [1] 90 - 111.1 %

ZDRV driver output resistance for the driver that is not

high-speed capable 28 - 44 Ω

VCRS output signal crossover voltage [1][2] 1.3 - 2.0 V

Data source timing[2]

tDJ1 source differential jitter for

consecutive transitions see Figure 10 [1] −3.5 - +3.5 ns

tDJ2 source differential jitter for paired

transitions see Figure 10 [1] −4- +4ns

tFEOPT source SE0 interval of EOP see Figure 11 160 - 175 ns

tFDEOP source differential data-to-EOP

transition skew see Figure 11 −2- +5ns

Receiver timing[2]

tJR1 receiver data jitter tolerance for

consecutive transitions see Figure 12 −18.5 - +18.5 ns

tJR2 receiver data jitter tolerance for

paired transitions see Figure 12 −9- +9ns

tFEOPR receiver SE0 width accepted as EOP; see

Figure 11 82--ns

tFST width of SE0 interval during

differential transaction rejected as EOP; see Figure 13 --14ns

Hub timing (downstream ports conﬁgured as full-speed)[2]

tFHDD hub differential data delay (without

cable) see Figure 14; CL=0pF --44ns

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 38 of 51

[1] Excluding the ﬁrst transition from Idle state.

[2] Characterized only, not tested. Limits guaranteed by design.

[1] Excluding the ﬁrst transition from Idle state.

[2] Characterized only, not tested. Limits guaranteed by design.

tFSOP data bit width distortion after SOP see Figure 14 −5- +5ns

tFEOPD hub EOP delay relative to tHDD see Figure 15 0 - 15 ns

tFHESK hub EOP output width skew see Figure 15 −15 - +15 ns

Table 44: Dynamic characteristics: full-speed source electrical characteristics

…continued

= 3.0 V to 3.6 V; T

amb

Cto70

C; test circuit Figure 22; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Table 45: Dynamic characteristics: low-speed source electrical characteristics

= 3.0 V to 3.6 V; T

amb

Cto70

C; test circuit Figure 22; unless otherwise speciﬁed.

Symbol Parameter Conditions Min Typ Max Unit

Driver characteristics

tLR rise time 75 - 300 ns

tLF fall time 75 - 300 ns

tLRFM differential rise and fall time

matching [1] 80 - 125 %

VCRS output signal crossover voltage [1][2] 1.3 - 2.0 V

Hub timing (downstream ports conﬁgured as full-speed)

tLHDD hub differential data delay see Figure 14 - - 300 ns

tLSOP data bit width distortion after SOP see Figure 14 [2] −60 - +60 ns

tLEOPD hub EOP delay relative to tHDD see Figure 15 [2] 0 - 200 ns

tLHESK hub EOP output width skew see Figure 15 [2] −300 - +300 ns

TPERIOD is the bit duration corresponding with the USB data rate.

Fig 10. Source differential data jitter.

mgr870

PERIOD

differential

data lines

crossover point crossover point crossover point

consecutive

transitions

N × T

PERIOD

+ t

DJ1

paired

transitions

N × T

PERIOD

+ t

DJ2

+3.3 V

0 V

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 39 of 51

TPERIOD is the bit duration corresponding with the USB data rate.

Full-speed timing symbols have a subscript preﬁx ‘F’, low-speed timing a preﬁx ‘L’.

Fig 11. Source differential data-to-EOP transition skew and EOP width.

mgr776

PERIOD

differential

data lines

crossover point

differential data to

SE0/ EOP skew

N × T

PERIOD

+ t

DEOP

source EOP width: t

EOPT

receiver EOP width: t

EOPR

crossover point

extended

+3.3 V

0 V

TPERIOD is the bit duration corresponding with the USB data rate.

tJR is the jitter reference point.

Fig 12. Receiver differential data jitter.

mgr871

PERIOD

differential

data lines

+3.3 V

0 V t

JR1

JR2

consecutive

transitions

N × T

PERIOD

+ t

JR1

paired

transitions

N × T

PERIOD

+ t

JR2

Fig 13. Receiver SE0 width tolerance.

mgr872

differential

data lines

+3.3 V

0 V

FST

IH(min)

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 40 of 51

Full-speed timing symbols have a subscript preﬁx ‘F’, low-speed timing a preﬁx ‘L’.

Fig 14. Hub differential data delay and SOP distortion.

mgr777

SOP distortion:

tSOP = tHDD (next J) − tHDD(SOP)

(A) downstream hub delay (B) upstream hub delay

upstream

differential

data lines

hub delay

downstream

tHDD

hub delay

upstream

tHDD

downstream

differential

data lines

downstream

differential

data

upstream

differential

data

crossover

point crossover

point

crossover

point

crossover

point

+3.3 V

0 V

+3.3 V

0 V

Full-speed timing symbols have a subscript preﬁx ‘F’, low-speed timing a preﬁx ‘L’.

Fig 15. Hub EOP delay and EOP skew.

mgr778

EOP+

EOP−

EOP+

EOP−

crossover

point

extended

crossover

point

extended

EOP delay:

EOP

= max (t

EOP−

, t

EOP+

)

EOP delay relative to t

HDD

EOPD

= t

EOP

− t

HDD

EOP skew:

HESK

= t

EOP+

− t

EOP−

(A) downstream EOP delay (B) upstream EOP delay

upstream

differential

data lines downstream

port

crossover

point

extended

crossover

point

extended

upstream

end of cable

downstream

differential

data lines

+3.3 V

0 V

+3.3 V

0 V

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 41 of 51

[1] fSCL =1⁄64 ×fXTAL.

[2] Rise time is determined by Cb and pull-up resistor value Rp (typical 4.7 kΩ).

Table 46: Dynamic characteristics: I2C-bus (pins SDA and SCL)

and T

amb

within recommended operating range; V

+5 V; V

GND

; V

and V

between V

and V

Symbol Parameter Conditions Min Typ Max Unit

Clock frequency

fSCL SCL clock frequency fXTAL =12MHz [1] 0 93.75 100 kHz

General timing

tLOW SCL LOW time 4.7 - - µs

tHIGH SCL HIGH time 4.0 - - µs

trSCL and SDA rise time [2] - - 1000 ns

tfSCL and SDA fall time - - 300 ns

Cbcapacitive load for each bus line - - 400 pF

SDA timing

tBUF bus free time 4.7 - - µs

tSU;STA set-up time for (repeated) START

condition 4.7 - - µs

tHD;STA hold time (repeated) START condition 4.0 - - µs

tSU;DAT data set-up time 250 - - ns

tHD;DAT data hold time 0 - - µs

tSU;STO set-up time for STOP condition 4.0 - - µs

Additional I2C-bus timing

tVD;DAT SCL LOW to data-out valid time - - 0.4 µs

Fig 16. I2C-bus timing.

PS Sr P

004aaa485

tHD;STA

tBUF

tSU;STA

tSU;DAT

tHIGH tLOW tSU;STO

tHD;DAT

SDA

SCL

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 42 of 51

17. Application information

17.1 Descriptor conﬁguration selection

17.2 Overcurrent detection limit adjustment

For an overcurrent limit of 500 mA per port, a PMOS with RDSON of approximately

100 mΩ is required. If a PMOS with a lower RDSON is used, analog overcurrent

detection can be adjusted by using a series resistor; see Figure 18.

∆VPMOS =∆Vtrip =∆Vtrip(intrinsic) −(IOC(nom) ×Rtd), where:

∆VPMOS = voltage drop on PMOS

IOC(nom) = 0.6 µA.

The I2C-bus cannot be shared between the EEPROM and the external microcontroller; see Table 11.

(1) The function on port 4, which is a non-removable port, is optional.

Fig 17. Descriptors conﬁguration selection application diagram.

004aaa303

ISP1520

ROM

external microcontroller

acting as I

C-bus master

USB function

EEPROM

C-bus

4 USB downstream facing ports

green and

amber LEDs,

port 1

green and

amber LEDs,

port 2

green and

amber LEDs,

port 3

green and

amber LEDs,

port 4(1)

upstream

facing port GoodLink

(1) Rtd is optional.

Fig 18. Adjusting analog overcurrent detection limit (optional).

004aaa259

VREF(5V0)

Rtd(1)

5 V

ISP1520

OCn_N

PSWn_N

IOC

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 43 of 51

17.3 Self-powered hub conﬁgurations

Fig 19. Self-powered hub; individual port power switching; individual overcurrent

detection.

PSW1_N

PSW2_N

SP/BP_N

OC1_N

OC2_N

PSW4_N

OC4_N

5 V ± 3 %

POWER SUPPLY −

VBUS

D+

D−

GND

port 2

port 3

SHIELD

+4.75 V

(min)

+4.85 V (min)

VREF(5V0)

GND

ISP1520

120 µF

ferrite bead

downstream

port connector

0.1 µF

47 kΩ

004aaa305

3.3 V LDO

VOLTAGE

REGULATOR

VCC

ADOC

VBUS

D+

D−

GND

SHIELD

+4.75 V

(min)

120 µF

ferrite bead

0.1 µF

47 kΩ

PSW3_N

OC3_N

3.3 V

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 44 of 51

Fig 20. Self-powered hub; ganged port power switching; global overcurrent

detection.

PSW1_N

SP/BP_N

OC1_N

5.1 V ± 3 %

POWER SUPPLY

(kick-up)

−

VBUS

D+

D−

GND

port 2

port 3

SHIELD

+4.75 V

(min)

+4.95 V (min)

VREF(5V0)

GND

ISP1520

120 µF

ferrite bead

downstream

port connector

0.1 µF

47 kΩ

004aaa307

VCC

ADOC 4

VBUS

D+

D−

GND

SHIELD

+4.75 V

(min)

120 µF

ferrite bead

low-ohmic

sense resistor

for overcurrent

detection

OC2_N

OC3_N

OC4_N

+ 5 V

PSW3_N

PSW2_N

PSW4_N

3.3 V LDO

VOLTAGE

REGULATOR

3.3 V

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 45 of 51

18. Test information

(1) Transmitter: connected to 50 Ω inputs of a high-speed differential oscilloscope.

Receiver: connected to 50 Ω outputs of a high-speed differential data generator.

Fig 21. High-speed transmitter and receiver test circuit.

(1) CL= 50 pF for full-speed.

Fig 22. Full-speed test circuit.

mdb273

DMn

DPn

50 Ω coax

DUT

GND

143 Ω

15.8 Ω

143 Ω

(1)

D−

D+

L(1)

(1)

15 kΩ

DPn

DMn

RPU

3.3 V

1.5 kΩ ± 5%

DUT

mdb274

L(1) 15 kΩ

test point

full-

speed

test point

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 46 of 51

19. Package outline

Fig 23. LQFP64 package outline.

UNIT A

max. A1A2A3bpcE

(1) eH

ELL

pZywv θ

REFERENCES

OUTLINE

VERSION EUROPEAN

PROJECTION ISSUE DATE

IEC JEDEC JEITA

mm 1.6 0.20

0.05 1.45

1.35 0.25 0.27

0.17 0.18

0.12 10.1

9.9 0.5 12.15

11.85 1.45

1.05 7

0.12 0.11 0.2

DIMENSIONS (mm are the original dimensions)

Note

1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.

0.75

0.45

SOT314-2 MS-026136E10 00-01-19

03-02-25

D(1) (1)(1)

10.1

9.9

12.15

11.85

1.45

1.05

EA1

detail X

(A )

HA2

vMB

vMA

48 33

pin 1 index

0 2.5 5 mm

scale

LQFP64: plastic low profile quad flat package; 64 leads; body 10 x 10 x 1.4 mm SOT314-2

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 47 of 51

20. Soldering

20.1 Introduction to soldering surface mount packages

This text gives a very brief insight to a complex technology. A more in-depth account

of soldering ICs can be found in our

Data Handbook IC26; Integrated Circuit

Packages

(document order number 9398 652 90011).

There is no soldering method that is ideal for all surface mount IC packages. Wave

soldering can still be used for certain surface mount ICs, but it is not suitable for ﬁne

pitch SMDs. In these situations reﬂow soldering is recommended. In these situations

reﬂow soldering is recommended.

20.2 Reﬂow soldering

Reﬂow soldering requires solder paste (a suspension of ﬁne solder particles, ﬂux and

binding agent) to be applied to the printed-circuit board by screen printing, stencilling

or pressure-syringe dispensing before package placement. Driven by legislation and

environmental forces the worldwide use of lead-free solder pastes is increasing.

Several methods exist for reﬂowing; for example, convection or convection/infrared

heating in a conveyor type oven. Throughput times (preheating, soldering and

cooling) vary between 100 and 200 seconds depending on heating method.

Typical reﬂow peak temperatures range from 215 to 270 °C depending on solder

paste material. The top-surface temperature of the packages should preferably be

kept:

•below 225 °C (SnPb process) or below 245 °C (Pb-free process)

–for all BGA, HTSSON..T and SSOP..T packages

–for packages with a thickness ≥2.5 mm

–for packages with a thickness < 2.5 mm and a volume ≥350 mm3 so called

thick/large packages.

•below 240 °C (SnPb process) or below 260 °C (Pb-free process) for packages with

a thickness < 2.5 mm and a volume < 350 mm3 so called small/thin packages.

Moisture sensitivity precautions, as indicated on packing, must be respected at all

times.

20.3 Wave soldering

Conventional single wave soldering is not recommended for surface mount devices

(SMDs) or printed-circuit boards with a high component density, as solder bridging

and non-wetting can present major problems.

To overcome these problems the double-wave soldering method was speciﬁcally

developed.

If wave soldering is used the following conditions must be observed for optimal

results:

•Use a double-wave soldering method comprising a turbulent wave with high

upward pressure followed by a smooth laminar wave.

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 48 of 51

•For packages with leads on two sides and a pitch (e):

–larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be

parallel to the transport direction of the printed-circuit board;

–smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the

transport direction of the printed-circuit board.

The footprint must incorporate solder thieves at the downstream end.

•For packages with leads on four sides, the footprint must be placed at a 45° angle

to the transport direction of the printed-circuit board. The footprint must

incorporate solder thieves downstream and at the side corners.

During placement and before soldering, the package must be ﬁxed with a droplet of

adhesive. The adhesive can be applied by screen printing, pin transfer or syringe

dispensing. The package can be soldered after the adhesive is cured.

Typical dwell time of the leads in the wave ranges from 3 to 4 seconds at 250 °C or

265 °C, depending on solder material applied, SnPb or Pb-free respectively.

A mildly-activated ﬂux will eliminate the need for removal of corrosive residues in

most applications.

20.4 Manual soldering

Fix the component by ﬁrst soldering two diagonally-opposite end leads. Use a low

voltage (24 V or less) soldering iron applied to the ﬂat part of the lead. Contact time

must be limited to 10 seconds at up to 300 °C.

When using a dedicated tool, all other leads can be soldered in one operation within

2 to 5 seconds between 270 and 320 °C.

20.5 Package related soldering information

[1] For more detailed information on the BGA packages refer to the

(LF)BGA Application Note

(AN01026); order a copy from your Philips Semiconductors sales ofﬁce.

[2] All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the

maximum temperature (with respect to time) and body size of the package, there is a risk that internal

or external package cracks may occur due to vaporization of the moisture in them (the so called

popcorn effect). For details, refer to the Drypack information in the

Data Handbook IC26; Integrated

Circuit Packages; Section: Packing Methods

Table 47: Suitability of surface mount IC packages for wave and reﬂow soldering

methods

Package[1] Soldering method

Wave Reﬂow[2]

BGA, HTSSON..T[3], LBGA, LFBGA, SQFP,

SSOP..T[3], TFBGA, USON, VFBGA not suitable suitable

DHVQFN, HBCC, HBGA, HLQFP, HSO, HSOP,

HSQFP, HSSON, HTQFP, HTSSOP, HVQFN,

HVSON, SMS

not suitable[4] suitable

PLCC[5], SO, SOJ suitable suitable

LQFP, QFP, TQFP not recommended[5][6] suitable

SSOP, TSSOP, VSO, VSSOP not recommended[7] suitable

CWQCCN..L[8], PMFP[9], WQCCN..L[8] not suitable not suitable

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 49 of 51

[3] These transparent plastic packages are extremely sensitive to reﬂow soldering conditions and must

on no account be processed through more than one soldering cycle or subjected to infrared reﬂow

soldering with peak temperature exceeding 217 °C±10 °C measured in the atmosphere of the reﬂow

oven. The package body peak temperature must be kept as low as possible.

[4] These packages are not suitable for wave soldering. On versions with the heatsink on the bottom

side, the solder cannot penetrate between the printed-circuit board and the heatsink. On versions with

the heatsink on the top side, the solder might be deposited on the heatsink surface.

[5] If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave

direction. The package footprint must incorporate solder thieves downstream and at the side corners.

[6] Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it

is deﬁnitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.

[7] Wave soldering is suitable for SSOP, TSSOP, VSO and VSOP packages with a pitch (e) equal to or

larger than 0.65 mm; it is deﬁnitely not suitable for packages with a pitch (e) equal to or smaller than

0.5 mm.

[8] Image sensor packages in principle should not be soldered. They are mounted in sockets or delivered

pre-mounted on ﬂex foil. However, the image sensor package can be mounted by the client on a ﬂex

foil by using a hot bar soldering process. The appropriate soldering proﬁle can be provided on

request.

[9] Hot bar soldering or manual soldering is suitable for PMFP packages.

21. Revision history

Table 48: Revision history

Rev Date CPCN Description

02 20040504 - Product data (9397 750 11689)

Modiﬁcations:

•Removed information on bus-power and hybrid-power

•Changed active LOW pin symbol representation from overscore (for example, NAME) to

underscore N (NAME_N)

•Globally changed VCC(5V0) to VREF(5V0)

•Table 2: updated

•Updated Section 9.1.3

•Updated Table 7

•Table 34 and Table 35: changed the value of VREF(5V0)

•Globally changed the value of Tamb

•Table 36: removed ICC(5V0)

•Updated Figure 16

•Updated Figure 19 and Figure 20.

01 20030625 - Preliminary data (9397 750 10689)

9397 750 11689

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

Product data Rev. 02 — 04 May 2004 50 of 51

Contact information

For additional information, please visit http://www.semiconductors.philips.com.

For sales ofﬁce addresses, send e-mail to: sales.addresses@www.semiconductors.philips.com.Fax: +31 40 27 24825

22. Data sheet status

[1] Please consult the most recently issued data sheet before initiating or completing a design.

[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at

URL http://www.semiconductors.philips.com.

[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.

23. Deﬁnitions

Short-form speciﬁcation — The data in a short-form speciﬁcation is

extracted from a full data sheet with the same type number and title. For

detailed information see the relevant data sheet or data handbook.

Limiting values deﬁnition — Limiting values given are in accordance with

the Absolute Maximum Rating System (IEC 60134). Stress above one or

more of the limiting values may cause permanent damage to the device.

These are stress ratings only and operation of the device at these or at any

other conditions above those given in the Characteristics sections of the

speciﬁcation is not implied. Exposure to limiting values for extended periods

may affect device reliability.

Application information — Applications that are described herein for any

of these products are for illustrative purposes only. Philips Semiconductors

make no representation or warranty that such applications will be suitable for

the speciﬁed use without further testing or modiﬁcation.

24. Disclaimers

Life support — These products are not designed for use in life support

appliances, devices, or systems where malfunction of these products can

reasonably be expected to result in personal injury. Philips Semiconductors

customers using or selling these products for use in such applications do so

at their own risk and agree to fully indemnify Philips Semiconductors for any

damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to

make changes in the products - including circuits, standard cells, and/or

software - described or contained herein in order to improve design and/or

performance. When the product is in full production (status ‘Production’),

relevant changes will be communicated via a Customer Product/Process

Change Notiﬁcation (CPCN). Philips Semiconductors assumes no

responsibility or liability for the use of any of these products, conveys no

licence or title under any patent, copyright, or mask work right to these

products, and makes no representations or warranties that these products are

free from patent, copyright, or mask work right infringement, unless otherwise

speciﬁed.

25. Licenses

26. Trademarks

ACPI — is an open industry speciﬁcation for PC power management,

co-developed by Intel Corp., Microsoft Corp. and Toshiba.

GoodLink — is a trademark of Koninklijke Philips Electronics N.V.

I2C-bus — is a trademark of Koninklijke Philips Electronics N.V.

OnNow — is a trademark of Microsoft Corporation.

Intel — is a registered trademark of Intel Corporation.

Level Data sheet status[1] Product status[2][3] Deﬁnition

I Objective data Development This data sheet contains data from the objective speciﬁcation for product development. Philips

Semiconductors reserves the right to change the speciﬁcation in any manner without notice.

II Preliminary data Qualiﬁcation This data sheetcontains data from the preliminary speciﬁcation. Supplementary data will be published

at a later date. Philips Semiconductors reserves the right to change the speciﬁcation without notice, in

order to improve the design and supply the best possible product.

III Product data Production This data sheet contains data from the product speciﬁcation. Philips Semiconductors reserves the

right to make changes at any time in order to improve the design, manufacturing and supply. Relevant

changes will be communicated via a Customer Product/Process Change Notiﬁcation (CPCN).

Purchase of Philips I2C components

Purchase of Philips I2C components conveys a license

under the Philips’ I2C patent to use the components in the

I2C system provided the system conforms to the I2C

speciﬁcation deﬁned by Philips. This speciﬁcation can be

ordered using the code 9398 393 40011.

Printed in The Netherlands

All rights are reserved. Reproduction in whole or in part is prohibited without the prior

written consent of the copyright owner.

The information presented in this document does not form part of any quotation or

contract, is believed to be accurate and reliable and may be changed without notice. No

liability will be accepted by the publisher for any consequence of its use. Publication

thereof does not convey nor imply any license under patent- or other industrial or

intellectual property rights.

Date of release: 04 May 2004 Document order number: 9397 750 11689

Contents

Philips Semiconductors ISP1520

Hi-Speed USB hub controller

1 General description. . . . . . . . . . . . . . . . . . . . . . 1

2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

4 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . 3

5 Ordering information. . . . . . . . . . . . . . . . . . . . . 3

6 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4

7 Pinning information. . . . . . . . . . . . . . . . . . . . . . 5

7.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

7.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5

8 Functional description . . . . . . . . . . . . . . . . . . . 9

8.1 Analog transceivers . . . . . . . . . . . . . . . . . . . . . 9

8.2 Hub controller core . . . . . . . . . . . . . . . . . . . . . . 9

8.2.1 Philips serial interface engine. . . . . . . . . . . . . . 9

8.2.2 Routing logic. . . . . . . . . . . . . . . . . . . . . . . . . . . 9

8.2.3 Transaction translator . . . . . . . . . . . . . . . . . . . . 9

8.2.4 Mini-host controller . . . . . . . . . . . . . . . . . . . . . . 9

8.2.5 Hub repeater. . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.2.6 Hub and port controllers. . . . . . . . . . . . . . . . . 10

8.2.7 Bit clock recovery . . . . . . . . . . . . . . . . . . . . . . 10

8.3 Phase-locked loop clock multiplier . . . . . . . . . 10

8.4 I2C-bus controller . . . . . . . . . . . . . . . . . . . . . . 10

8.5 Overcurrent detection circuit. . . . . . . . . . . . . . 10

8.6 GoodLink . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

8.7 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 11

9 Conﬁguration selections. . . . . . . . . . . . . . . . . 12

9.1 Conﬁguration through I/O pins . . . . . . . . . . . . 12

9.1.1 Number of downstream facing ports. . . . . . . . 12

9.1.2 Power switching . . . . . . . . . . . . . . . . . . . . . . . 13

9.1.3 Overcurrent protection mode . . . . . . . . . . . . . 14

9.1.4 Non-removable port . . . . . . . . . . . . . . . . . . . . 14

9.1.5 Port indicator support . . . . . . . . . . . . . . . . . . . 15

9.2 Device descriptors and string descriptors

settings using I2C-bus . . . . . . . . . . . . . . . . . . 15

9.2.1 Background information on I2C-bus . . . . . . . . 15

9.2.2 Architecture of conﬁgurable hub descriptors . 16

9.2.3 ROM or EEPROM map. . . . . . . . . . . . . . . . . . 17

9.2.4 ROM or EEPROM detailed map. . . . . . . . . . . 17

10 Hub controller description . . . . . . . . . . . . . . . 22

10.1 Endpoint 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10.2 Endpoint 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

11 Descriptors. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

12 Hub requests . . . . . . . . . . . . . . . . . . . . . . . . . . 26

12.1 Standard USB requests . . . . . . . . . . . . . . . . . 26

12.2 Hub class requests. . . . . . . . . . . . . . . . . . . . . 27

12.3 Detailed responses to hub requests. . . . . . . . 28

12.3.1 Get conﬁguration . . . . . . . . . . . . . . . . . . . . . . 28

12.3.2 Get device status . . . . . . . . . . . . . . . . . . . . . . 29

12.3.3 Get interface status. . . . . . . . . . . . . . . . . . . . . 29

12.3.4 Get endpoint status . . . . . . . . . . . . . . . . . . . . 29

12.3.5 Get hub status . . . . . . . . . . . . . . . . . . . . . . . . 29

12.3.6 Get port status . . . . . . . . . . . . . . . . . . . . . . . . 30

12.4 Various get descriptors. . . . . . . . . . . . . . . . . . 31

13 Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 32

14 Recommended operating conditions . . . . . . 32

15 Static characteristics . . . . . . . . . . . . . . . . . . . 33

16 Dynamic characteristics. . . . . . . . . . . . . . . . . 36

17 Application information . . . . . . . . . . . . . . . . . 42

17.1 Descriptor conﬁguration selection . . . . . . . . . 42

17.2 Overcurrent detection limit adjustment. . . . . . 42

17.3 Self-powered hub conﬁgurations . . . . . . . . . . 43

18 Test information. . . . . . . . . . . . . . . . . . . . . . . . 45

19 Package outline. . . . . . . . . . . . . . . . . . . . . . . . 46

20 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

20.1 Introduction to soldering surface mount

packages. . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

20.2 Reﬂow soldering. . . . . . . . . . . . . . . . . . . . . . . 47

20.3 Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 47

20.4 Manual soldering . . . . . . . . . . . . . . . . . . . . . . 48

20.5 Package related soldering information. . . . . . 48

21 Revision history . . . . . . . . . . . . . . . . . . . . . . . 49

22 Data sheet status. . . . . . . . . . . . . . . . . . . . . . . 50

23 Deﬁnitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

24 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

25 Licenses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

26 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 50