USB2524 SMSC Corporation, USB2524 Datasheet

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USB2524

Manufacturer Part Number
USB2524
Description
USB MultiSwitch Hub
Manufacturer
SMSC Corporation
Datasheet

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PRODUCT FEATURES
SMSC USB2524
USB2.0 Compatible 4-Port Hub with two upstream
Downstream ports can be disabled or defined as non-
Switching hub can be configured as compound
Multiple LED modes for maximum implementation
host port connections
— Provides electronic reconfiguration and re-assignment
— Allows multiple USB hosts to share peripherals and
— Each host has a dedicated Single Transaction
removable
device for support of ‘embedded’ USB peripherals
flexibility
— USB Mode - 1 Single-color LED for each downstream
— Host Ownership Mode - 8 Single-Color LED’s indicate
— Host Ownership & Port Speed Mode - 8 Dual-Color
of any of its 4 downstream ports to either of two
upstream host ports (“on-the-fly”).
enables a user to dynamically assign host ownership.
Translator (Single-TT) for supporting FS/LS devices, or
can also operate in Multi-TT mode where each
downstream port has a dedicated Transaction
Translator.
port (total of 8 LED’s).
which upstream host each of the downstream ports are
assigned to.
LED’s are used to indicate which upstream host each
of the downstream ports are assigned to, while
simultaneously indicating downstream port connection
speed.
– Embedded Mode - 8 (predefined, OEM
– Peripheral Mode - Dedicated select pin for
programmable) configurations for port
assignment are selectable via three external
control signals.
every downstream port (total of 4), selectable
edge or level triggered in order to support a
wide range of possible switch configurations
and styles.
DATASHEET
Enhanced configuration options available through
Hardware Strapping options allow for configuration
Complete USB Specification 2.0 Compatibility
On-Board 24MHz Crystal Driver Circuit or 24 MHz
Internal PLL for 480MHz USB2.0 Sampling
Internal 1.8V Linear Voltage Regulator
Integrated USB termination and Pull-up/Pull-down
Internal Short Circuit protection of USB differential
1.8 Volt Low Power Core Operation
3.3 Volt I/O with 5V Input Tolerance
56-Pin QFN Green, Lead-free Package
either a Single Serial I
Port
— VID/PID/DID
— Port Configuration
— String Descriptors (each can support a maximum length
— Assignment of downstream ports to upstream hosts
— Switching mechanism selection
without an external EEPROM or SMBus Host
— Default VID/PID/DID, allows functionality when
— Includes USB2.0 Hi-Speed Transceivers
— High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and
— Full power management with choice of Individual or
external clock driver
resistors
signal pins
USB MultiSwitch
USB2524
of 31 characters)
configuration EEPROM is absent
Low-Speed (1.5Mbits/s) compatible
Ganged power control
– Custom Manufacturer String
– Custom Product String
– Custom Serial String
2
C EEPROM, or SMBus Slave
Revision 1.2 (07-17-06)
TM
Datasheet
Hub

Related parts for USB2524

USB2524 Summary of contents

Page 1

... Host Ownership & Port Speed Mode - 8 Dual-Color LED’s are used to indicate which upstream host each of the downstream ports are assigned to, while simultaneously indicating downstream port connection speed. SMSC USB2524 USB2524 USB MultiSwitch Enhanced configuration options available through either a Single Serial I Port — ...

Page 2

... USB2524-ABZJ FOR 56-PIN QFN PACKAGE (GREEN, LEAD-FREE) 80 Arkay Drive Hauppauge, NY 11788 (631) 435-6000 FAX (631) 273-3123 Copyright © 2006 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given ...

Page 3

... Register 15h: Serial String Length (Reset = 0x00 7.1.4.23 Register 16h-53h: Manufacturer String (Reset = 0x00 7.1.4.24 Register 54h-91h: Product String (Reset = 0x00 7.1.4.25 Register 92h-CFh: Serial String (Reset = 0x00 7.1.4.26 Register D0h: Port Interface Delay Timer (Reset = 0x00 7.1.4.27 Register D1h: Port Assign Interface Configuration 0A (Reset = 0x00 SMSC USB2524 3 DATASHEET Revision 1.2 (07-17-06) ...

Page 4

... SMBus Slave Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.3.1 Bus Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.3.1.1 Block Read/Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 7.3.2 Invalid Protocol Response Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 7.3.3 General Call Address Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 7.3.4 Slave Device Time-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 7.3.5 Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 7.3.6 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 7.3.7 Bus Reset Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 7.3.8 SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 7.3.8.1 Undefined Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 7.3.8.2 Reserved Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Revision 1.2 (07-17-06) 4 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 5

... RESET_N for Strapping Option Configuration 9.1.1.2 RESET_N for EEPROM Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 9.1.1.3 RESET_N for SMBus Slave Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 9.1.2 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Chapter 10 XNOR Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Chapter 11 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 11.1 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 11.1.1 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Chapter 12 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 12.1 Oscillator/Clock 12.1.1 SMBus Interface 12.1.2 I2C EEPROM 12.1.3 USB2 Chapter 13 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 SMSC USB2524 5 DATASHEET Revision 1.2 (07-17-06) ...

Page 6

... Figure 7.1 LED Strapping Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Figure 8.1 Dual Color LED Implementation Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Figure 9.1 Reset_N Timing for Default/Strap Option Mode Figure 9.2 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Figure 9.3 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Figure 13.1 USB2524 56-Pin QFN Package Outline and Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Revision 1.2 (07-17-06) 6 DATASHEET TM USB MultiSwitch ...

Page 7

... TM USB MultiSwitch Hub Datasheet List of Tables Table 3.1 USB2524 56-PIN QFN Pin Configuration Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 5.1 Switching Hub Pin Descriptions Table 5.2 SMBus or EEPROM Interface Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 5.3 Miscellaneous Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 5.4 Power, Ground, and No Connect Table 5.5 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 6.1 Port Assign Interface (Embedded Mode Table 7.1 Internal EEPROM & ...

Page 8

... Hub ports support Low-Speed, Full-Speed, and High-Speed (if operating as a High-Speed Hub) downstream devices on all of the enabled downstream ports. A USB peripheral or USB Hub that is attached to one of the downstream USB2524 ports will be available to one or the other of the upstream USB host controllers, but can never be simultaneously shared with both host controllers ...

Page 9

... Strapping option pins make it possible to modify a limited sub-set of the configuration options. The USB2524 may also be configured by an external EEPROM or a microcontroller. When using the microcontroller interface, the Hub appears as an SMBus slave device. If the Hub is pin-strapped for external EEPROM configuration but no external EEPROM is present, then a value of ‘ ...

Page 10

Chapter 2 Switching Hub Block Diagram stre tre ...

Page 11

... TM USB MultiSwitch Hub Datasheet Chapter 3 Pin Layout Table 3.1 USB2524 56-PIN QFN Pin Configuration Table UPSTREAM USB2.0 INTERFACES (6 PINS) USBUP_DP1 VBUS_DET1 DOWNSTREAM 4-PORT USB2.0 INTERFACE (30 PINS) USBDN_DP1 USBDN_DP3 LED_A1_N/NON_REM0 LED_A2_N/NON_REM1 LED_B1_N PRTPWR1 OCS1_N RBIAS PRTPWR_POL PRT_ASSIGN2 PRT_ASSIGN3 SDA/SMBDATA XTAL1/CLKIN TEST VDDPLL18(1) DIGITAL POWER, GROUND & NO CONNECT (6 PINS) ...

Page 12

... VDDA33 47 USBUP_DP2 48 USBUP_DM2 49 VDDCR18 50 XTAL2 51 XTAL1/CLKIN 52 VDDPLL18 53 VDD33 RBIAS 56 Revision 1.2 (07-17-06) SMSC USB2524 (Top View QFN-56) thermal slug connects to VSS 12 DATASHEET TM USB MultiSwitch Hub Datasheet 28 LED_A2_N/NON_REM1 27 PRTPWR1 26 OCS1_N 25 OCS2_N 24 PRTPWR2 23 PRTPWR3 22 OCS3_N 21 OCS4_N 20 PRTPWR4 19 PRTPWR_POL 18 TEST 17 VDD33 16 VDDCR18 15 LED_B3_N SMSC USB2524 ...

Page 13

... Enable Port 4:3 Green LED_A[4:3]_N/ LED PRT_DIS[1:0] & Port Disable strapping option SMSC USB2524 Table 5.1 Switching Hub Pin Descriptions TYPE UPSTREAM USB2.0 INTERFACE IO-U These pins connect to the upstream USB bus data signals. I/O Detects state of Upstream VBUS power. The SMSC Hub monitors VBUS_DET to determine when to assert the internal D+ pull-up resistor (signalling a connect event) ...

Page 14

... Care should be taken when designing with active low components! IPU Input from external current monitor indicating an over- current condition. {Note: Contains internal pull-up to 3.3V supply} A 12.0kΩ (+/− 1%) resistor is attached from ground to this I-R pin to set the transceiver’s internal bias settings. 14 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 15

... NAME SYMBOL CFG_SEL2 CFG_SEL1 SMSC USB2524 TYPE I Port Assign Interface: Operates in either a 3-wire mode, or 4-wire mode. See Chapter 6, Assigning Ports details. SERIAL PORT INTERFACE IOSD12 (Serial Data)/(SMB Data) signal. IOSD12 (Serial Clock)/(SMB Clock) signal. CFG_SEL0: The logic state of this multifunction pin is ...

Page 16

... Used for testing the chip. User must treat as a no- connect or connect to ground. TYPE +1.8V core power. pin 20 must have a 4.7 Ω) <0.1 capacitor to VSS +3.3V Power Supply for the Digital I/O. 16 DATASHEET TM USB MultiSwitch Hub Datasheet FUNCTION FUNCTION for the required logic voltage FUNCTION μ F (or greater) ±20% (ESR SMSC USB2524 ...

Page 17

... Defined in USB Specification. Note: Meets USB 1.1 requirements when operating as a 1.1-compliant device and meets USB2.0 requirements when operating as a 2.0-compliant device. AIO Analog Input/output. Per PHY test requirements. SMSC USB2524 TYPE +1.8V Filtered analog power for internal PLL. This pin must have a 4.7 Ω) <0.1 capacitor to VSS +3 ...

Page 18

... PRT_ASSIGN interface. The PRT_ASSIGN interface has three operating modes. One is called the Embedded Mode, and the other is Peripheral Mode (with two different electrical “sub” modes; (level triggered or edge triggered). Note: Any change in PRT_ASSIGN pins will be ignored until the USB2524 is out of reset 6.1.1 Embedded Mode: ...

Page 19

... In this mode, the SMBus interface remains “live” during operation of the switching hub and is used to switch/assign ports “on-the-fly” through SMBus commands. This is accomplished through register direct writes to the Port Assignment registers (see the USB_ATTACH description under Status/Command (Reset = 0x00) on page SMSC USB2524 Register D0h: Port Interface Delay Timer (Reset = 39). 19 ...

Page 20

... Config Data Byte 1 Config Data Byte 2 Config Data Byte 3 Non-Removable Devices 20 DATASHEET TM USB MultiSwitch Hub Datasheet DEFAULT ABBR ROM VIDL 24h VIDM 04h PIDL 24h PIDM 25h DIDL 00h DIDM 00h CFG1 9Bh CFG2 10h CFG3 00h NRD 00h SMSC USB2524 ...

Page 21

... F1h R/W F2h R/W F3h R/W F4h R/W F5h R/W F6h-FEh R/W FFh R/W SMSC USB2524 REGISTER NAME Port Disable (Self) Port Disable (Bus) Max Power (Self) Max Power (Bus) Hub Controller Max Current (Self) Hub Controller Max Current (bus) Power-on Time LANG_ID_H LANG_ID_L MFR_STR_LEN PRD_STR_LEN SER_STR_LEN MFR_STR ...

Page 22

... BCD format (assigned by OEM). This field is set by the OEM using either the SMBus or EEPROM interface options. DESCRIPTION Most Significant Byte of the Device ID. This is a 16-bit device release number in BCD format (assigned by OEM). This field is set by the OEM using either the SMBus or EEPROM interface options. 22 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 23

... EOP_DISABLE 2:1 CURRENT_SNS 0 PORT_PWR SMSC USB2524 DESCRIPTION Self or Bus Power: Selects between Self- and Bus-Powered operation. The Hub is either Self-Powered (draws less than 2mA of upstream bus power) or Bus-Powered (limited to a 100mA maximum of upstream power prior to being configured by the host controller). When configured as a Bus-Powered device, the SMSC Hub consumes less than 100mA of current prior to being configured ...

Page 24

... Port Assign Interface is configured for Direct Port Control. (4-Wire), edge Sensitive, and Unassigned state is not supported. ‘11’ = Port Assign Interface is configured for Direct Port Control. (4-Wire), edge Sensitive, and the Unassigned state is supported. 24 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 25

... STRING_EN 7.1.4.10 Register 09h: Non-Removable Device (Reset = 0x00) BIT NUMBER BIT NAME 7:0 NR_DEVICE SMSC USB2524 DESCRIPTION ‘0’ = Port assignment is controlled by hardware interface pins ‘1’ = Port assignment is controlled by: PORT_ASSIGN_12 PORT_ASSIGN_34 PORT_ASSIGN_56 PORT_ASSIGN_7 Reserved LED Mode Selection: The LED_A[4:1]_N and LED_B[4:1]_N pins support several different modes of operation (depending upon OEM implementation of the LED circuit) ...

Page 26

... VBUS) of all associated circuitry on the board. This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device, and the embedded peripheral reports 0mA in its descriptors. Note: The USB2.0 Specification does not permit this value to exceed 100mA 26 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 27

... BIT NUMBER BIT NAME 7:0 LANG_ID_L SMSC USB2524 DESCRIPTION Max Power Bus_Powered: Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when operating as a bus-powered hub. This value includes the hub silicon along with the combined power consumption (from VBUS) of all associated circuitry on the board. This value also includes ...

Page 28

... LSB, MSB manner). Some EEPROM programmers may transpose the MSB and LSB, thus reversing the Byte order. Please pay careful attention to the Byte ordering or your selected programming tools. 28 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 29

... Register D1h: Port Assign Interface Configuration 0A (Reset = 0x00) BIT NUMBER BIT NAME 7:0 PORT_INT_0A SMSC USB2524 DESCRIPTION Serial String, UNICODE UTF-16LE per USB 2.0 Specification Maximum string length is 31 characters (62 Bytes) Note: The String consists of individual 16 Bit UNICODE UTF-16LE characters. The Characters will be stored starting with the LSB at the ...

Page 30

... Reserved, will default to ‘0001’ value to ‘1111’ Bit [3:0] = ‘0000’ Port 1 is unassigned ‘0001’ Port 1 owned by UP1 ‘0010’ Port 1 owned by UP2 ‘0011’ Reserved, will default to ‘0001’ value to ‘1111’ 30 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 31

... Register D9h: Port Assign Interface Configuration 2A (Reset = 0x00) BIT NUMBER BIT NAME 7:0 PORT_INT_2A SMSC USB2524 DESCRIPTION Port Assign Interface 1B: Determines the configuration of the hardware interface configuration for the assignment of ports 3 & upstream hosts. Bit [7:4] = ‘0000’ Port 4 is unassigned ‘0001’ Port 4 owned by UP1 ‘ ...

Page 32

... Reserved, will default to ‘0001’ value to ‘1111’ Bit [3:0] = ‘0000’ Port 1 is unassigned ‘0001’ Port 1 owned by UP1 ‘0010’ Port 1 owned by UP2 ‘0011’ Reserved, will default to ‘0001’ value to ‘1111’ 32 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 33

... Register E1h: Port Assign Interface Configuration 4A (Reset = 0x00) BIT NUMBER BIT NAME 7:0 PORT_INT_4A SMSC USB2524 DESCRIPTION Port Assign Interface 3B: Determines the configuration of the hardware interface configuration for the assignment of ports 3 & upstream hosts. Bit [7:4] = ‘0000’ Port 4 is unassigned ‘0001’ Port 4 owned by UP1 ‘ ...

Page 34

... Reserved, will default to ‘0001’ value to ‘1111’ Bit [3:0] = ‘0000’ Port 1 is unassigned ‘0001’ Port 1 owned by UP1 ‘0010’ Port 1 owned by UP2 ‘0011’ Reserved, will default to ‘0001’ value to ‘1111’ 34 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 35

... Register E9h: Port Assign Interface Configuration 6A (Reset = 0x00) BIT NUMBER BIT NAME 7:0 PORT_INT_6A SMSC USB2524 DESCRIPTION Port Assign Interface 5B: Determines the configuration of the hardware interface configuration for the assignment of ports 3 & upstream hosts. Bit [7:4] = ‘0000’ Port 4 is unassigned ‘0001’ Port 4 owned by UP1 ‘ ...

Page 36

... Reserved, will default to ‘0001’ value to ‘1111’ Bit [3:0] = ‘0000’ Port 1 is unassigned ‘0001’ Port 1 owned by UP1 ‘0010’ Port 1 owned by UP2 ‘0011’ Reserved, will default to ‘0001’ value to ‘1111’ 36 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 37

... NUMBER BIT NAME 7:0 PORT_ASSIGN_12 Port 1 & 2 Assignment to upstream host port. Determines which upstream port SMSC USB2524 DESCRIPTION Port Assign Interface 7B: Determines the configuration of the hardware interface configuration for the assignment of ports 3 & upstream hosts. Bit [7:4] = ‘0000’ Port 4 is unassigned ‘ ...

Page 38

... Bit 7= Reserved Bit 6= Reserved Bit 5= Reserved Bit 4= 1; Port 4 is locked. Bit 3= 1; Port 3 is locked. Bit 2= 1; Port 2 is locked. Bit 1= 1; Port 1 is locked. Bit 0 is Reserved, always = ‘0’ 38 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 39

... Reserved 2 INTF_PW_DN 1 RESET 0 USB_ATTACH SMSC USB2524 DESCRIPTION Reserved. {Note: Software must never write a ‘1’ to these bits} SMBus Interface Power Down 0 = Interface is active 1 = Interface power down after ACK has completed. {Note: This bit is write once and is only cleared by assertion of the external RESET_N pin ...

Page 40

... Master Specification (Please refer to the 2 C-Bus Specification for details Specification are not supported. 40 DATASHEET TM USB MultiSwitch Hub Datasheet Table 5.2, "SMBus bus protocols). The Hub’ EEPROM, and it conforms to the SMSC USB2524 ...

Page 41

... The byte count may not Block Read or Write is allowed to transfer a maximum of 32 data bytes. For the following SMBus tables: Denotes Master-to-Slave SMSC USB2524 Invalid Protocol Response Behavior on page Denotes Slave-to-Master Table 7.2 SMBus Block Write ...

Page 42

... SCLK. 7.3.6 SMBus Timing The SMBus Slave Interface complies with the SMBus AC Timing Specification. See the SMBus timing in the “Timing Diagram” section. Revision 1.2 (07-17-06) Table 7.3 SMBus Block Read ). TIMEOUT, MAX 42 DATASHEET TM USB MultiSwitch Hub Datasheet Devices that TIMEOUT, MIN SMSC USB2524 ...

Page 43

... Default Strapping Option The USB2524 can be configured via a combination of internal default values and pin strap options. The strapping option pins only cover a limited sub-set of the configuration options. The internal default values will be used for the bits & registers that are not controlled by a strapping option pin. ...

Page 44

... Chapter 8 LED Interface Description The USB2524 supports 3 different (mutually exclusive) LED modes. USB Mode provides 8 LEDS, which conform to the USB 2.0 specification functional requirements for Green and Amber LED’s. Basic Host Owner LED Indication mode uses 8 Single color LED’s to provide user indication of upstream host ownership of the 4 downstream ports. Host Owner and Downstream Port Speed LED Indication mode uses 8 Dual Color LED’ ...

Page 45

... LED circuit will be implemented. The Circuit will need to be replicated for each of the 8 LED pins on the USB2524. In this circuit, when the LED pin is driven to a logic low state, the Green LED will Light up. When the LED pin is driven to a Logic High state the Red LED will Light up. When a 1KHz square wave is driven out on the LED pin, the Green and Red LED’ ...

Page 46

... HS, and FS/LS will remain FS/LS) What will change is the 3rd color which represents an assigned port with no connection, when in suspend the corresponding LED will be off (giving the same indication as unassigned, while the hub is suspended). This disables the 1khz toggle while the hub is suspended. Revision 1.2 (07-17-06) 46 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 47

... The external crystal oscillator is halted. The PLL is halted. LED indicators are disabled. The Hub is “operational” 500μs after RESET_N is negated. Once operational, the Hub immediately reads OEM-specific data from the external EEPROM (if the SMBus option is not disabled) or the internal ROM. SMSC USB2524 47 DATASHEET Revision 1.2 (07-17-06) ...

Page 48

... Upstream levels Driven by Hub if strap is an output. Don’t Care MIN 1 16.7 16.7 100 undefined 48 DATASHEET TM USB MultiSwitch Hub Datasheet Start completion Idle request response t7 t8 TYP MAX UNITS μsec nsec 1400 nsec μsec 1.5 2.0 100 msec msec msec 5 msec SMSC USB2524 ...

Page 49

... Completion time for requests (with or without data stage). Note 9.2 When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t4+t5+t6+t7. SMSC USB2524 Read EEPROM Attach USB Reset + USB Set Options ...

Page 50

... Hub PHY USB Reset USB Load Stabilization Upstream MIN 1 Note 9.3) 100 50 DATASHEET USB MultiSwitch Datasheet Start completion Idle recovery request response TYP MAX UNITS μsec μsec 500 250 300 msec 100 msec msec Undefined msec 5 msec SMSC USB2524 TM Hub ...

Page 51

... TM USB MultiSwitch Hub Datasheet Complies with Section 11.10 of the USB 2.0 Specification for behavior after completion of the reset sequence. The Host then configures the Hub and the Hub’s downstream port devices in accordance with the USB Specification. SMSC USB2524 51 DATASHEET Revision 1.2 (07-17-06) ...

Page 52

... RBIAS, TEST, Power, and Ground). This functionality is enabled by driving TEST and CFG_SEL[1] high, driving SCLK low and transition of RESET_N from low to high. The output from the XNOR chain is driven to LED_A2_N. For each pin tested for continuity LED_A2_N should toggle. Revision 1.2 (07-17-06) 52 DATASHEET TM USB MultiSwitch Hub Datasheet SMSC USB2524 ...

Page 53

... High Input Level V Input Leakage Hysteresis (‘IS’ Only) V Input Buffer with Pull-Up (IPU) Low Input Level V High Input Level V Low Input Leakage I High Input Leakage I SMSC USB2524 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +4. +3.3 V tolerance -5% to ±10 DDA33 Table 11.1 DC Electrical Characteristics MIN TYP MAX 0.8 ILI 2.0 IHI I -10 ...

Page 54

... Upstream Port the process of being mA enumerated by an external Host controller (all downstream ports assigned to the Upstream port under enumeration). Note: Both Upstream Ports are in the process of being enumerated by mA external Host mA controllers. Total from all supplies SMSC USB2524 TM Hub ...

Page 55

... Capacitance Input Capacitance C IN Output Capacitance C OUT Power Sequencing There are no power supply sequence restrictions for the Hub. The order in which power supplies power-up and power-down is implementation dependent. SMSC USB2524 MIN TYP MAX 182 182 182 182 272 73 = 25° 1MHz ...

Page 56

... Frequency is fixed at 58.6 KHz ± 20%. 12.1.3 USB2.0 The Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the USB2.0 Specification which is available at the Specification for more information. Revision 1.2 (07-17-06) www.usb.org web site. Please refer to the USB 56 DATASHEET TM USB MultiSwitch Hub Datasheet Section 7.3, SMSC USB2524 ...

Page 57

... TM USB MultiSwitch Hub Datasheet Chapter 13 Package Outline Figure 13.1 USB2524 56-Pin QFN Package Outline and Parameters SMSC USB2524 57 DATASHEET Revision 1.2 (07-17-06) ...

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