EVB-USB2524 SMSC, EVB-USB2524 Datasheet - Page 12

• Manufacturer Part Number: EVB-USB2524
• Description: BOARD EVAL USB2524 SHARE/SWITCH
• Manufacturer: SMSC
• Series: MultiSwitch™r

Specifications of EVB-USB2524

• Main Purpose: Interface, USB 2.0 Hub
• Embedded: No
• Utilized Ic / Part: USB2524
• Primary Attributes: Quad Port Hub, High Speed (480Mbps), SMBus
• Secondary Attributes: Overcurrent Protection, Port Power Switching, Multi-TT Enabled
• Interface Type: USB
• Operating Supply Voltage: 5 V
• Product: Interface Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: USB2524
• Other names: 638-1044

Chapter 4 Switching Hub Pin Descriptions
Revision 1.91 (08-22-07)
strapping option 0
strapping option 1
Detect Upstream
High-Speed USB
Port 4:3 Green
USB Bus Data
VBUS Power
Port Disable
Port Disable
USB Power
Enable
NAME
Data
LED
&
USBUP_DM[2:1]
USBDN_DM[4:1]
USBDN_DP[4:1]
USBUP_DP[2:1]
VBUS_DET[2:1]
LED_A[4:3]_N/
PRTPWR[4:1]
PRT_DIS[1:0]
PRT_DIS1
SYMBOL
Table 4.1 Switching Hub Pin Descriptions
4-PORT USB 2.0 HUB INTERFACE
UPSTREAM USB 2.0 INTERFACE
TYPE
I/O12
I/O12
IO-U
IO-U
I/O
O
DATASHEET
These pins connect to the upstream USB bus data signals.
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).
When designing a detachable hub, this pin must be
connected to the VBUS power pin of the USB port that is
upstream of the hub. (Use of a weak pull-down resistor is
recommended.)
For self-powered applications with a permanently attached
host, this pin must be pulled-up to either 3.3V or 5.0V
(typically VDD33).
These pins connect to the downstream USB peripheral
devices attached to the Hub’s ports.
Enables power to USB peripheral devices (downstream).
The active signal level of the PRTPWR[4] pin is determined
by the Power Polarity Strapping function of the
PRTPWR_POL pin.
Green indicator LED for ports 4 and 3. Will be active low
when LED support is enabled via EEPROM or SMBus. See
PRT_DIS1 function description if the hub is configured by
the internal default configuration.
If the hub is configured by the internal default configuration,
PRT_DIS[1:0] will be sampled at RESET_N negation to
determine if ports [4:2] will be permanently disabled. Also,
the active state of LED_A3_N will be determined as follows:
PRT_DIS[1:0] = '00', All ports are enabled,
LED_A4_N is active high,
LED_A3_N is active high.
PRT_DIS[1:0] = '01', Port 4 is disabled,
LED_A4_N is active high,
LED_A3_N is active low.
PRT_DIS[1:0] = '10', Ports 4 & 3 are disabled,
LED_A4_N is active low,
LED_A3_N is active high.
PRT_DIS[1:0] = '11', Ports 4, 3 & 2 are disabled,
LED_A4_N is active low,
LED_A3_N is active low.
12
FUNCTION
USB MultiSwitch
SMSC USB2524
Datasheet
TM
Hub