USB2514 datasheet(10/46 Pages) SMSC

10 / 46 page

USB 2.0 High-Speed 4-Port Hub Controller

Datasheet

Revision 1.92 (05-08-07)

SMSC USB2514

DATASHEET

LED_A[4:1]_N/

PRT_SWP[4:1]

n/a

I/O12

Port LED Indicators & Port Swap strapping option

Indicator LED for ports 1-4. Will be active low when LED

support is enabled via EEPROM or SMBus.

If this strap is enabled by package and configuration

settings (see Table 3.2), this pin will be sampled at

RESET_N negation to determine the electrical

connection polarity of the downstream USB Port pins

(USB_DP and USB_DM).

Also, the active state of the LED will be determined as

follows:

‘0’ = Port Polarity is normal, and the LED is active high.

‘1’ = Port Polarity (for USB_DP and USB_DM) is

swapped, and the LED is active low.

LED_B4_N

n/a

I/O12

Enhanced Port 4 LED

Enhanced Indicator LED for port 4. Will be active low

when LED support is enabled via EEPROM or SMBus.

LED_B3_N/

GANG_EN

n/a

I/O12

Enhanced Port 3 LED & Gang Power and Overcurrent

Strap Option

Enhanced Indicator LED for port 3. Will be active low

when LED support is enabled via EEPROM or SMBus.

GANG_EN: Selects between Gang or Individual Port

power and Over Current sensing.

If this strap is enabled by package and configuration

settings (see Table 3.2), this pin will be sampled at

RESET_N negation to determine the mode as follows:

‘0’ = Individual sensing & switching, and LED_B3_N is

active high.

‘1’ = Ganged sensing & switching, and LED_B3_N is

active low.

LED_B[2:1]_N/

BOOST[1:0]

n/a

I/O12

Enhanced Port [2:1] LED & Phy Boost strapping option

Enhanced Indicator LED for ports 1 & 2. Will be active

low when LED support is enabled via EEPROM or

SMBus.

Table 3.1 USB2514 Pin Descriptions (continued)

SYMBOL

36 QFN

48 QFN

BUFFER

TYPE

DESCRIPTION

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