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ISP1521

Hi-Speed Universal Serial Bus hub controller

Rev. 03 — 24 November 2004 Product data

1. General description

The ISP1521 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 ISP1521 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 ISP1521 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 ISP1521 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 ISP1521 has seven downstream facing ports. If not used, ports 3 to 7 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 I

C-bus™ EEPROM or a

microcontroller.

The ISP1521 is suitable for self-powered hub designs.

An analog overcurrent detection circuitry is built into the ISP1521, 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 ISP1521 are monitor hubs, docking stations for notebooks,

internal USB hub for motherboards, hub for extending Intel

Easy PCs, hub boxes,

and so on.

Summary of content (54 pages)

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ISP1521 Hi-Speed Universal Serial Bus hub controller Rev. 03 — 24 November 2004 Product data 1. General description The ISP1521 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 7. Pinning information 61 GRN4_N 62 AMB4_N 63 GRN3_N 64 AMB3_N 65 GRN7_N 66 AMB7_N 67 GRN2_N REF(5V0) CC3 68 AMB2_N 69 V 70 V 71 GND 72 GRN1_N 73 AMB1_N 74 GRN6_N 75 AMB6_N 76 GRN5_N 77 AMB5_N 78 HUBGL_N 79 SCL 80 SDA 7.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 2: Pin description[1]…continued Symbol[2] Pin Type Description DP0 4 AI/O upstream facing port 0 D+ connection (analog) RPU 5 AI pull-up resistor connection; connect this pin through a resistor of 1.5 kΩ ± 5 % to 3.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 2: Pin description[1]…continued Symbol[2] Pin Type Description OC4_N 32 AI/I overcurrent sense input for downstream facing port 4 (analog/digital) PSW4_N 33 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 34 AI/I overcurrent sense input for downstream facing port 3 (analog/digital)
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 2: Pin description[1]…continued Symbol[2] Pin Type Description DP3 55 AI/O downstream facing port 3 D+ connection (analog)[3] VCC2 56 - transceiver supply voltage 2 (3.3 V) GND 57 - ground supply DM4 58 AI/O downstream facing port 4 D− connection (analog)[3] DP4 59 AI/O downstream facing port 4 D+ connection (analog)[3] NOOC 60 I no overcurrent protection selection input; connect this pin to HIGH (3.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 2: Pin description[1]…continued Symbol[2] Pin Type Description GND 71 - ground supply GRN1_N 72 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 73 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 GRN6_N 74 I/O outp
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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: • • • • • • • • 8.2.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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 ISP1521: 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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. POR VCC 2.03 V ≤ 683 µs 0V t1 004aaa388 At t1: clock is running and available. Fig 3. Power-on reset timing. POR EXTERNAL CLOCK 004aaa365 A Stable external clock is to be available at A. Fig 4. External clock with respect to power-on reset.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 9. Configuration selections The ISP1521 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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 (7); see Table 4. The sum of physical ports configured is reflected in the bNbrPorts field.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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. The PCB resistance may cause a drop of 25 mV, which leaves 75 mV for the power switch and overcurrent sense device. 5V + POWER SUPPLY ± 3 % regulated − voltage drop 75 mV 4.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 6: Overcurrent protection mode pin configuration Power switching mode NOOC PSW1_N PSW2_N PSW3_N PSW4_N PSW5_N PSW6_N PSW7_N None HIGH ground ground ground ground ground ground ground Global LOW internal pull-up ground ground ground ground ground ground Individual LOW internal pull-up internal pull-up internal pull-up internal pull-up internal pull-up internal pull-up internal pull-up Both analog and digital o
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 9.2.2 Architecture of configurable hub descriptors MICROCONTROLLER SERIAL EEPROM I2C-bus signature match MASTER/SLAVE I2C-BUS INTERFACE RAM (256 bytes) HUB CORE DESCRIPTOR GENERATOR INTERFACE MUX ROM (256 bytes) MLD711 The I2C-bus cannot be shared between the EEPROM and the external microcontroller. Fig 7. Configurable hub descriptors. The configurable hub descriptors can be masked in the internal ROM memory; see Figure 7.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 9.2.3 ROM or EEPROM map 00H Signature 02H Device Descriptor 0AH Language ID 10H String Descriptor (first Language ID): iManufacturer string iProduct string iSerial Number string 7FH 80H FFH String Descriptor (second Language ID): iManufacturer string iProduct string iSerial Number string MLD714 Fig 8. 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 12: ROM or EEPROM detailed map…continued Address Content (hex) Default Example Comment (hex) (hex) 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
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 12: ROM or EEPROM detailed map…continued Address Content (hex) Default Example Comment (hex) (hex) 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 -
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 12: ROM or EEPROM detailed map…continued Address Content (hex) Default Example Comment (hex) (hex) 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 bS
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 12: ROM or EEPROM detailed map…continued Address Content (hex) Default Example Comment (hex) (hex) 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 [1] [2] [3] If this string descriptor is not supported, this bLength field must be programmed with the value 02H.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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).
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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 7 Port n Status Change 0 no change in the status of port n (n = 1 to 7) 1 change in the status of port n (n = 1 to 7) 11.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 16: Device_qualifier descriptor Offset (bytes) Field name Value (hex) 0 bLength 0A 0A descriptor length = 10 bytes 1 bDescriptorType 06 06 type = DeviceQualifierType 2 bcdUSB 00 00 see USB specification Rev. 2.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 19: Offset (bytes) Interface descriptor Field name Value (hex) Full-speed Comments High-speed 0 bLength 09 09 descriptor length = 9 bytes 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 bInterfaceP
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 22: wHubCharacteristics bit description Bit Function Value D0, D1 logical power switching mode 00 D2 compound hub selection D3, D4 overcurrent protection mode Description ganged 01 individual and multiple ganged 10 none 11 - 0 non-compound 1 compound 00 global 01 individual and multiple ganged 10 none 11 - D5 - - - D6 - - - D7 port indicator 0 global feature 1 - 12.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 23: Standard USB requests…continued bmRequestType byte 0 (bits 7 to 0) bRequest wValue byte 1 bytes 2, 3 (hex) (hex) wIndex bytes 4, 5 (hex) wLength bytes 6, 7 (hex) Data response 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 En
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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 GetTTState 1010 0011 10 TT-flags 01, 00 -[1] TT state StopTT 0010 0011 11 00, 00 01, 00 00, 00 none 0010 0011 03 15, 00 port[4], 01 00, 00 none 15, 00 port[4], 02 00, 00 none 15, 00 port[4], 03 00, 00 none Test modes Test_J Test_
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 26: 12.3.2 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 - Get device status This request returns two bytes of data; see Table 27. Table 27: Bit Function Value Description 0 self-powered 1 self-powered 1 remote wake-up 0 disabled 1 enabled 0 - 2 to 15 12.3.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 30: Bit Function Value Description 17 overcurrent indicator change 0 no change in overcurrent 1 overcurrent status has changed 0 - 18 to 31 12.3.6 Get hub status response…continued reserved 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).
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 32: Get port status change response (wPortChange)…continued Bit Function Value Description 2 suspend change 0 no change 1 resume complete 0 no change in the overcurrent indicator 1 change in the overcurrent indicator 0 no change 1 reset complete 0 - 3 overcurrent indicator change 4 reset change 5 to 15 reserved 12.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 13. Limiting values Table 34: Absolute maximum ratings In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter VCC supply voltage 3.3 V VREF(5V0) input reference voltage 5.0 V Conditions VI(5V0) input voltage on 5 V buffers 3.0 V < VCC < 3.6 V VI(3V3) input voltage on 3.3 V buffers 3.0 V < VCC < 3.6 V VO(3V3) output voltage on 3.3 V buffers Ilu latch-up current Max Unit −0.5 +4.6 V −0.5 +6.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 15. Static characteristics Table 36: Static characteristics: supply pins VCC = 3.0 V to 3.6 V; Tamb = −40 °C to +70 °C; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Full-speed IREF(5V0) ICC(tot) supply current 5 V total supply current 3.3 V - 0.5 - mA ICC(tot) = ICC1 + ICC2 + ICC3 + ICC4 [1] - 91 - mA suspend mode; internal clock stopped [2] - 0.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 38: Static characteristics: I2C-bus interface block VCC = 3.0 V to 3.6 V; Tamb = −40 °C to +70 °C; unless otherwise specified. Symbol Parameter Input pin SCL and input/output pin Conditions Min Typ Max Unit 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 39: Static characteristics: USB interface block (DP0 to DP7 and DM0 to DM7)…continued VCC = 3.0 V to 3.6 V; Tamb = −40 °C to +70 °C; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit 10 - - MΩ 3.0 - 3.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 16. Dynamic characteristics 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 43: Dynamic characteristics: high-speed source electrical characteristics VCC = 3.0 V to 3.6 V; Tamb = −40 °C to +70 °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 479.76 - 480.24 Mbit/s Clock timing tHSDRAT data rate tHSFRAM microframe interval 124.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 44: Dynamic characteristics: full-speed source electrical characteristics…continued VCC = 3.0 V to 3.6 V; Tamb = −40 °C to +70 °C; test circuit Figure 22; unless otherwise specified.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller TPERIOD +3.3 V crossover point extended crossover point differential data lines 0V differential data to SE0/EOP skew N × TPERIOD + t DEOP source EOP width: t EOPT receiver EOP width: t EOPR mgr776 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. TPERIOD +3.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller +3.3 V upstream differential data lines crossover point crossover point downstream differential data 0V hub delay downstream t HDD hub delay upstream t HDD +3.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Table 46: Dynamic characteristics: I2C-bus (pins SDA and SCL) VCC and Tamb within recommended operating range; VDD = 5 V; VSS = VGND ; VIL and VIH between VSS and VDD. Symbol Parameter Conditions Min Typ Max Unit 0 93.75 100 kHz 4.7 - - µs 4.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 17. Application information 17.1 Descriptor configuration selection upstream facing port GoodLink I2C-bus ROM ISP1521 external microcontroller acting as I2C-bus master green and amber LEDs, port 1 . . green and amber LEDs, port 7(1) EEPROM USB function 004aaa302 7 USB downstream facing ports The I2C-bus cannot be shared between the EEPROM and the external microcontroller; see Table 11.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 17.3 Self-powered hub configurations + 5V±3% POWER SUPPLY − +4.85 V (min) 3.3 V LDO VOLTAGE REGULATOR downstream port connector T1 VCC VREF(5V0) PSW1_N GND ferrite bead 120 µF 0.1 µF 47 kΩ V +4.75 V BUS (min) D+ D− 1 GND SHIELD OC1_N PSW2_N TEST_LOW OC2_N PSW3_N OC3_N TEST_HIGH port 2 to port 6 PSW4_N ISP1521 3.3 V or 5.0 V OC4_N ADOC PSW5_N OC5_N PSW6_N OC6_N T7 PSW7_N 0.1 µF 47 kΩ ferrite bead 120 µF V +4.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 5.1 V ± 3 % + POWER SUPPLY − (kick-up) +4.95 V (min) low-ohmic sense resistor for overcurrent detection 3.3 V LDO VOLTAGE REGULATOR downstream port connector VCC T1 OC1_N VREF(5V0) GND PSW1_N 0.1 µF 47 kΩ ferrite bead 120 µF V +4.75 V BUS (min) D+ D− 1 GND SHIELD PSW2_N PSW3_N TEST_LOW PSW4_N PSW5_N ISP1521 port 2 to port 6 PSW6_N PSW7_N TEST_HIGH OC2_N OC3_N +5V ferrite bead OC4_N 3.3 V or 5.0 V ADOC OC5_N 120 µF V +4.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 18. Test information VCC DPn 15.8 Ω DMn 15.8 Ω 50 Ω coax D+ (1) DUT 50 Ω coax D− GND mdb273 143 Ω 143 Ω (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. 3.3 V 1.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 19. Package outline LQFP80: plastic low profile quad flat package; 80 leads; body 12 x 12 x 1.4 mm SOT315-1 c y X A 60 41 40 Z E 61 e E HE A A2 (A 3) A1 w M θ bp Lp L pin 1 index 80 21 1 detail X 20 ZD e v M A w M bp D B HD v M B 0 5 10 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e mm 1.6 0.16 0.04 1.5 1.3 0.25 0.27 0.13 0.18 0.12 12.1 11.9 12.1 11.9 0.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller • 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller [3] [4] [5] [6] [7] [8] [9] 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.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller 22. Data sheet status 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 sheet contains data from the preliminary specification.
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ISP1521 Philips Semiconductors Hi-Speed USB hub controller Contents 1 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.2.1 8.2.2 8.2.3 8.2.4 8.2.5 8.2.6 8.2.7 8.3 8.4 8.5 8.6 8.7 9 9.1 9.1.1 9.1.2 9.1.3 9.1.4 9.1.5 9.2 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Ordering information . . .
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